Is Whey Protein Dairy? Best Whey & Dairy Free Protein Picks
Posted by Leonard Shemtob on Sep 03, 2025
Whey protein is a milk-derived protein made during cheese production, when milk separates into curds (solids) and whey (liquid).
This liquid whey is then processed to become the protein powder many people use to help build muscles and stay healthy. Since whey protein comes from milk, it is considered a dairy product.
However, whether it will affect those with lactose intolerance or a milk allergy is a different story. Let's clear up the confusion so you can make an informed choice.
[Related] Does Whey Protein Make You Fat? The Real Truth Revealed
Quick Summary
- What is Whey Protein? Whey protein is a high-quality protein that comes from milk during cheese-making and contains all nine essential amino acids needed by the body.
- Lactose Content is Often Low: While it's dairy, most high-quality whey protein isolates and hydrolysates contain very little lactose, making them suitable for many people with lactose intolerance.
- Not Safe for Milk Allergies: Whey protein contains milk proteins (casein and whey), which can trigger allergic reactions.
- Digestive Enzymes are Key: Many modern whey proteins include digestive enzymes like lactase to further break down lactose and minimize potential stomach upset.
- Not All Whey is Equal for Digestion: While all whey is dairy, the amount of lactose can vary. Whey protein isolate is a more refined form with most of the lactose removed, making it easier for some people with lactose sensitivities to digest compared to whey protein concentrate.
- Dairy-Free Alternatives Exist: For those who need to avoid dairy completely, excellent plant-based proteins (like pea, brown rice, or hemp protein) provide a complete amino acid profile.
- Our Top Supplement Picks: For a premium whey protein, we recommend Farm Fed 100% Whey by Axe & Sledge. Its clean formula from grass-fed cows includes digestive enzymes for smoother digestion. For those looking for a dairy-free protein source, our top choice is Select Vegan Plant-Based Protein, which provides a complete amino acid profile to effectively support your muscle-building goals.
What is Whey Protein?
Whey protein is a type of protein that is made from milk. The process of making whey protein starts with cheese production. When milk is used to make cheese or yogurt, it separates into milk solid parts called curds and liquid parts called whey.
Whey is the watery liquid left after the curds form. This liquid whey contains water, lactose (milk sugar), minerals, and important proteins. The liquid whey comes from heated milk, which is pasteurized to remove harmful bacteria.
To make whey protein powder, the liquid whey is collected and cleaned by removing fat, lactose, carbohydrates, and other non-protein parts. This is done using processes like filtration and drying.
The result is a high-protein powder (about 70–80% for concentrates; about 90% for isolates/hydrolysates). There are different types of whey protein based on how much they are processed: concentrate, isolate, and hydrolysate, each with different protein levels and digestion speeds.
This powder can be mixed into a drink or used in baked goods like protein pancakes. In short, think of it this way: whey protein is to cheese as flour is to bread. It's the core ingredient that is separated and refined to create a new, powerful product.
Whey protein is popular because it is a “complete protein.” This means it contains all nine essential amino acids, which are the building blocks necessary for muscle repair and growth. It is also digested quickly, making it a favorite choice for athletes and people who exercise regularly.
Types of Whey Protein
Whey protein supplements are not all the same. The main difference comes from how much processing they go through and how much lactose, fat, and protein they contain. The three most common types are:
1. Whey Protein Concentrate (WPC)
Think of Whey Protein Concentrate as the least processed and most whole-food form of whey powder. It goes through basic filtering to remove a portion of the water, lactose, and fat, but it still retains much of the beneficial nutrients found naturally in whey.
- Protein Content: Typically contains 70-80% protein by weight.
- Lactose & Fat: Contains some lactose (milk sugar) and fat. This gives it a richer, creamier taste.
- Best For: Most people who don’t have significant issues with lactose. It’s the most popular type due to its great value, good nutrient profile, and better flavor.
- Good to know: This is the form you'll find in many mainstream "blends" and is a fantastic everyday option.
2. Whey Protein Isolate (WPI)
Whey Protein Isolate is processed further to strip away almost all of the fat and lactose. What you’re left with is a powder that is almost pure protein. It’s a more refined product.
- Protein Content: 90% or higher protein by weight. You get more protein per scoop.
- Lactose & Fat: Contains very little to no lactose and fat. This makes it a much clearer choice for those with lactose intolerance.
- Best For: Individuals who are limiting their carb/sugar intake, those who are lactose intolerant, and anyone looking for a pure protein hit with minimal extra calories from carbs or fat.
- Good to know: Isolates are often a bit more expensive than concentrates due to the extra processing.
3. Whey Protein Hydrolysate (WPH)
Hydrolysate is the most processed form of whey. It undergoes a method called hydrolysis, where enzymes or acids are used to partially break down (digest) the protein into smaller pieces called peptides.
- Protein Content: Similar to Isolate (very high).
- Lactose & Fat: Very low, similar to isolate.
- Best For: This type is designed for rapid absorption by the body. It may also be a good option for people with very sensitive stomachs, as their body has to do less work to break it down.
- Good to know: The hydrolysis process can give it a slightly bitter taste, which is why it's less common in consumer products.
So, Is Whey Protein Dairy?
The short and simple answer is: yes, whey protein is a dairy product. It comes from cow’s milk during cheese-making and contains milk proteins like whey and casein, which are among the most common food allergens.
Think of it like this: Just as apple juice is still a fruit product, whey protein is still a dairy product, even though it’s processed into a powder. Its origin in milk is what defines it.
Can You Use Whey Protein Powder If You Are Lactose Intolerant?
This is one of the biggest questions surrounding whey protein, and the answer isn't a simple yes or no. For many people with lactose intolerance, yes, you can likely still enjoy whey protein—but you must choose the right type.
Let's break down exactly how it works.
First, Remember What Lactose Intolerance Is
Lactose intolerance means your body doesn't produce enough of the enzyme lactase, which is needed to break down lactose (the sugar found in milk). When undigested lactose sits in your gut, it can cause uncomfortable symptoms like:
- Bloating
- Gas
- Stomach cramps
- Diarrhea
Since whey is a dairy product, it contains lactose. But how much lactose it contains makes all the difference.
Not All Whey Protein is Created Equal
Your ability to tolerate whey protein depends almost entirely on which of the three types you choose. The level of processing determines how much lactose is removed.
Here’s a more in-depth guide:
1. Whey Protein Concentrate (WPC): PROCEED WITH CAUTION
- This form undergoes the least processing and retains the most lactose and fat.
- Likely to cause symptoms: If you are lactose intolerant, Whey Protein Concentrate has a high chance of triggering bloating, gas, and stomach discomfort.
- Recommendation: Many with lactose intolerance experience symptoms with WPC; most do better choosing an isolate.
2. Whey Protein Isolate (WPI): EASY ON DIGESTION
- This is the best choice for most people with lactose intolerance.
- Why? It undergoes additional processing to strip away almost all the fat and lactose. The result is a product that is typically over 90% pure protein.
- Lactose content is typically very low (often around or under 1%), so many people with lactose intolerance tolerate it well.
- Recommendation: This is the safest whey option for lactose-intolerant users. Look for "Isolate" on the label.
3. Whey Protein Hydrolysate (WPH): THE SAFEST BET
- This type is "predigested" and contains the least amount of lactose, similar to Isolate.
- It is processed further to break down the protein into smaller pieces, which makes it absorb faster and can be even easier on the stomach.
- Recommendation: An excellent choice, though often more expensive and less common.
A Special Note: Look for Added Enzymes
Many modern protein powders, including some whey isolates, now add digestive enzymes like lactase (the enzyme you're missing) directly into their formula.
- Seeing "lactase" or "digestive enzymes" on the ingredient list is a great sign.
- These enzymes help your body break down the tiny amount of remaining lactose, making the product even gentler on your stomach.
Practical Tips for Trying Whey Protein
If you're lactose intolerant but want to try whey protein, follow these steps:
- Start with Isolate: Only consider Whey Protein Isolate. Do not start with Concentrate.
- Read the Label: Check the nutritional facts. Look for brands that specify "low lactose" or mention added digestive enzymes.
- Start with a Small Serving: For your first time, try a half-scoop instead of a full one. See how your body reacts over the next few hours. You can even add a small amount to a single meal, like oatmeal, to test your tolerance.
- Have it with Food: Consuming your protein shake with a meal can sometimes help slow digestion and reduce potential symptoms.
- Listen to Your Body: Everyone's tolerance level is different. If even an isolate causes discomfort, it may be a sign that your sensitivity is very high, and a plant-based protein would be a better fit.
Can You Use Whey Protein if You Have a Dairy Allergy?
No! If you have a real dairy allergy, you should avoid whey protein completely.
Research data has shown that even trace amounts can cause a reaction in sensitive individuals. It is not safe for you.
Let's break down why.
Allergy vs. Intolerance: A Big Difference
It's important to know that a dairy allergy is very different from lactose intolerance.
- Lactose Intolerance: Is a problem with digesting sugar (lactose). It causes a stomachache but is not deadly.
- Milk Allergy: It is a problem with your immune system. Your body mistakes the protein in milk for a dangerous attacker.
Since whey protein is one of those milk proteins, your body will see it as an enemy and react.
Why Whey Protein is Dangerous
A dairy allergy means you are allergic to the proteins in milk. The two main proteins are:
- Casein
- Whey
Whey protein powder is made from whey protein. So, if you are allergic to milk, you are allergic to the main ingredient in this powder.
It does not matter what type it is:
- Concentrate
- Isolate
- Hydrolysate
All of them contain the whey protein that your body reacts to. Even "lactose-free" whey protein is not "milk-protein-free." It is still dangerous.
What Could Happen?
An allergic reaction can be serious. Symptoms can start quickly and include:
- Hives or a skin rash
- Swelling of the lips, tongue, or throat
- Trouble breathing
- Stomach pain, vomiting, or diarrhea
- Dizziness
In the worst cases, it can cause a life-threatening reaction called anaphylaxis.
What Should You Use Instead?
The best choice for people with a dairy allergy is to use plant-based protein powders, such as pea, soy, rice, or hemp protein. These options do not come from milk and are safe for those who cannot have dairy.
Our Best Picks for the Best Whey Protein Supplements
- Farm Fed 100% Whey By Axe & Sledge: Clean Formula Made From Grass-Fed Cows
- Huge Whey By Huge Supplements: Gluten-Free Whey Protein Option
- ISO 100 By Dymatize: Fast-Digesting Pure Whey Isolate
- Bio Active Whey By iSatori: Blend Of Concentrate, Isolate, And Hydrolysate With Added Bioactive Peptides
- AfterShock Critical Mass By Myogenix: High-Calorie Mass Gainer With Creatine And Glutamine
1. Farm Fed 100% Whey (Axe & Sledge)
Farm Fed is a premium, grass-fed whey protein isolate designed for individuals who demand a clean and effective supplement. Sourced from 100% grass-fed cows, it is a cold-processed and micro-filtered whey protein isolate, which ensures the protein remains in its purest form.
Each serving delivers 25g of protein and includes 100mg of DigeSEB™ digestive enzymes, making it a clean, gently processed formula. It’s low in carbs, fat, and sugar, non-GMO, and cold-processed to maintain a meal-like flavor without sacrificing nutritional integrity.
Key Ingredients
- Whey Protein Isolate: Pure protein source with minimal lactose and fat.
- Peanut Flour Powder: Adds flavor and minor nutritional value.
- Natural Flavors: Derived from real ingredients to enhance taste.
- Gum Blend (Acacia, Guar, Xanthan Gum): Thickeners for smooth texture.
- Sunflower Lecithin: Emulsifier that improves mixability.
- Sodium Chloride: Enhances flavor.
- Sucralose: Zero-calorie sweetener.
- Medium Chain Triglycerides (MCT) 70% on Acacia: Provides light, healthy fats for energy.
- DigeSEB Enzyme Blend (Amylases, Lactase, Proteases, Lipase, Cellulase): Helps break down carbs, lactose, proteins, fats, and fibers for better digestion and absorption.
Key Benefits
- Delivers 25 grams of clean, fast-absorbing protein per serving.
- Supports muscle growth, repair, and recovery.
- The protein is sourced from grass-fed cows, appealing to consumers concerned about quality and sourcing practices.
- Contains digestive enzymes to reduce bloating and gastrointestinal discomfort.
- Low in fats, sugars, and lactose, making it easier for sensitive individuals to consume.
- Made from antibiotic-free, non-GMO, grass-fed cows, ensuring high-quality sourcing.
Customer Reviews
Best Tasting Whey
“The Chocolate Cookies & Cream flavor is probably one of the best tasting whey protein proteins I've had to date. I use it as coffee creamer with a little milk and also make protein oats with it. I would definitely recommend trying this protein powder out if you haven't!”
-Josh
2. Huge Whey by Huge Supplements
Huge Whey by Huge Supplements is a whey protein concentrate-based powder designed to offer a budget-friendly yet effective option for muscle building and recovery. Each serving delivers 23.5–25 grams of protein (depending on flavor) with a macro profile tailored to support lean mass gains without excessive calories.
The product is manufactured in a GMP-compliant facility in the USA and has gained popularity for its dessert-inspired flavors, such as Chocolate Brownie and Cinnamon Bun. Notably, it includes digestive enzymes (lactase and papain) to aid tolerance, though the brand explicitly cautions those with lactose intolerance to opt for their isolate version instead.
Key Ingredients
- Whey Protein Concentrate: The main protein source, providing high-quality amino acids crucial for muscle repair and growth.
- Lactase: An enzyme that helps digest lactose, reducing potential digestive discomfort in people sensitive to dairy sugars.
- Papain: A proteolytic enzyme extracted from papayas that aids in breaking down protein into smaller peptides and amino acids for faster absorption.
- Natural and Artificial Flavors: Used to create the product's appealing and extensive flavor profiles.
- Xanthan Gum: A thickening agent that gives the shake a smoother, richer texture.
- Sucralose & Acesulfame Potassium: Zero-calorie sweeteners that provide a sweet taste without the added sugar, which helps keep the total calorie count low.
- Salt: Used to enhance the overall flavor.
Key Benefits
- Provides 25 grams of high-quality protein per serving.
- Supports lean muscle growth and improved workout recovery.
- Includes enzymes to aid digestion and reduce bloating.
- Low in carbohydrates and fats.
- Offers diverse flavors for an enjoyable protein shake experience.
- Gluten-free product, suitable for those avoiding gluten.
3. Dymatize ISO 100 Whey Protein Isolate
Dymatize ISO 100 is a premium hydrolyzed whey protein isolate designed for rapid absorption and minimal digestive discomfort. It is a longstanding favorite among athletes and bodybuilders for its low-carb, low-fat, and low-lactose profile, with each serving providing 25 grams of protein and only 120–130 calories.
The protein is pre-hydrolyzed, meaning it undergoes enzymatic predigestion to break down into smaller peptides, facilitating faster uptake into muscles and reducing the risk of gastrointestinal issues.
Key Ingredients
- Hydrolyzed Whey Protein Isolate: The primary protein source, subjected to enzymatic hydrolysis to break down protein chains into smaller peptides. This process reduces antigenicity and allows for rapid absorption, often within 30 minutes of consumption. It contains >90% protein purity with negligible lactose (<1%) and fat.
- Cocoa Powder (Processed with Alkali): Adds chocolate flavor.
- Sucralose: A calorie-free sweetener to provide sweetness without added sugars.
- Salt: Contributes to flavor and electrolyte balance.
Key Benefits
- Delivers 25 grams of fast-digesting hydrolyzed whey protein isolate per serving.
- Supports rapid muscle repair and recovery.
- Very low in carbs, fats, and lactose, ideal for sensitive stomachs.
- Third-party tested for quality and purity.
- Available in a variety of flavors to suit different taste preferences.
Customer Reviews
Smooth and good for any occasion.
“So I have tried some of the different proteins on this site over time. While I do like some of the other ones, I do have to say that ISO 100 is probably one of the SMOOTHEST tasting and digesting proteins I have every tried. I do like to take it between meals if I feel my stomach is starting to get "hungry" or "needing something".
Getting it to break for smoothness is not an issue either. It breaks up and mixes very easily. I can not recall a time there was any small chunks that did not break from the shaking and mixing of it.
If you are looking for something that is promised to taste good and break up easily, this is the protein to go to.”
-Dempsey
Solid overall
“I gave this 4 stars because it is a little pricey. Besides that its great. Mixes easy, tastes good, 0g fat and 1 g carbs!”
-clay m.
4. Bio Active Whey by iSatori
Bio Active Whey by iSatori offers a scientifically advanced whey protein formula combining concentrate, isolate, and hydrolysate protein sources. It delivers 25 grams of high-quality protein per serving along with naturally occurring BCAAs and glutamine.
This supplement is fortified with BIO-GRO Bio-Active Peptides, clinically shown to enhance strength, recovery, and lean muscle gains. It contains no amino spiking and uses clean ingredients with gluten-free certification.
Key Ingredients
- Whey Protein Blend: A combination of Whey Protein Concentrate, Whey Protein Isolate, and Whey Protein Hydrolysate. This blend ensures both immediate and sustained protein delivery to the muscles, maximizing the "anabolic window" after a workout.
- BIO-GRO® Bio-Active Peptides: This is the core patented ingredient, a proprietary blend of peptides extracted from micro-concentrated colostrum. The peptides are designed to signal muscle cells to absorb more amino acids and accelerate protein synthesis, which helps to speed up recovery and muscle growth.
- Natural Flavors: Used to create the taste profile of the product.
- Xanthan Gum: A common food additive used as a thickener to improve the texture and mixability of the shake.
- Sucralose: A non-caloric artificial sweetener used to provide sweetness without adding sugar.
- Soy Lecithin: An emulsifier that helps the powder dissolve smoothly in liquid, preventing clumping.
Key Benefits
- 25 grams of premium whey protein per serving to support muscle growth.
- BIO-GRO peptides improve recovery and accelerate strength gains.
- No artificial amino spiking ensures real protein content.
- Gluten-free and great-tasting formula.
- Supports lean muscle development and workout adaptation.
Customer Reviews
Great product!
“Its great tasting, super easy to digest, no bloating, easy to mix, and a great formula! Ive been recommending it to all my friends, thanks!”
-JC
Great taste!
“Tastes good, easy to mix and no bloating.
And the price beats every other product out there with the same level of quality”
-TS
5. AfterShock Critical Mass by Myogenix
AfterShock Critical Mass by Myogenix is a lean mass gainer designed to support calorie surplus goals without the bloating or digestive issues common to traditional weight gainers. It features an ultra-low-lactose protein blend comprising milk protein isolate, whey protein concentrate, and whey protein isolate, delivering 60 grams of protein and 700 calories per serving alongside a complex carbohydrate matrix.
Unlike conventional gainers that use cheap fillers, it incorporates MassFat™ (healthy fats) and WaxyMASS™ (waxymaize carbs) to ensure nutrients are directed toward muscle growth rather than fat storage. The formula is ultra-low glycemic and avoids lactose-related bloating, making it suitable for those with dairy sensitivities.
Key Ingredients
- Critical Mass Carbs™ (Maltodextrin, Oat Bran, Yam): Blend of fast and slow carbs for quick energy and sustained fuel.
- Critical Mass Protein Blend™ (Whey Protein Isolate, Milk Protein Isolate, Ultra-Filtered Whey Concentrate): Mix of proteins with different absorption rates to support recovery and muscle mass.
- Cane Juice Solids: Natural carb source for added energy.
- Mass Fat™ (Creamer, MCT Powder): Provides medium-chain triglycerides and fats to support energy and calorie density.
- Amino Stack™ (Micronized Creatine Monohydrate, MagnaPower® Creatine, L-Glutamine): Supports strength, endurance, recovery, and cell hydration.
- Natural & Artificial Flavors, Sea Salt, Sucralose, Xanthan Gum: For taste, sweetness, and improved mixability.
Key Benefits
- 60g of high-quality protein for muscle building.
- Balanced carb blend fuels workouts and supports glycogen recovery.
- Includes creatine and glutamine to enhance strength and recovery.
- 700 calories per serving make it ideal for individuals needing extra mass support.
Customer Reviews
Outstanding, helps gain some mass back without any fat
“Even at age 54, this product and hard work helped me gain back 10 lbs of muscle, without adding any fat. Also tastes great and mixes easily. Highly recommended.”
-Tim
my phenix after shock
“This product I love it does and what its made for!! Good high quality protein use after each workout , and I feel good. It tastes great too!! I'd recommend this for anyone looking for a tasty and good quality protein.”
-mannie
Highly recommended
“Cookies and Cream, hands down, best tasting protein I've ever had. I bet I have tried at least 20 different kinds. It's the best. Also, some weight gainers upset my stomach, but this one doesn't. It contains chelated creatine (bonds to magnesium) rather than monohydrate (bonds with water). It is argued that this leads to better absorption and less bloating. Now I don't know if that's true, but I do know that this product didn't make my stomach hurt. I WILL take this again.”
-Big L.
Using Dairy-Free Protein Powders
For those who need or prefer to avoid dairy entirely, dairy-free protein powders are a reliable alternative.
These plant-based or non-dairy options offer many of the same benefits as whey without the risk of lactose, casein, or milk proteins triggering digestive discomfort or allergic reactions.
Who Benefits Most from Dairy-Free Protein?
-
People with milk allergies: Since whey and casein come directly from milk, they can be dangerous for anyone with a true dairy allergy. Plant-based proteins are the only safe option.
-
Those with severe lactose intolerance: Even whey isolates and hydrolysates, which are very low in lactose, may still cause symptoms for people who are extremely sensitive.
-
Vegans and dairy-free lifestyles: Anyone avoiding animal products for ethical, environmental, or personal health reasons will find plant proteins the natural choice.
Types of Dairy-Free Protein
-
Pea Protein: High in branched-chain amino acids (BCAAs) and easy to digest.
-
Brown Rice Protein: Complements pea protein by filling in amino acid gaps, helping to create a complete protein profile.
-
Hemp Protein: Provides omega-3 fatty acids along with protein, though typically lower in total protein per serving.
-
Soy Protein: A long-standing dairy-free option that delivers a complete amino acid profile, though some avoid it due to concerns about phytoestrogens or soy sensitivity.
How Dairy-Free Proteins Compare to Whey
While whey is absorbed faster and is naturally high in leucine (key for muscle protein synthesis), plant-based blends can still rival whey in effectiveness when formulated correctly. Many modern vegan proteins now combine multiple sources (like pea + rice) to deliver a complete amino acid spectrum close to that of whey protein.
Another convenient dairy-free option would be Perfect Amino Protein Bars by BodyHealth, which deliver a balanced amino acid profile in a portable protein bar format for those who want protein support without mixing powders.
In short, dairy-free proteins have evolved into highly effective supplements that can support muscle growth, recovery, and overall nutrition just as well as traditional whey — making them an excellent choice for those who cannot or choose not to consume dairy.
Best Dairy-Free Protein Option
Select Vegan Protein by PEScience
Select Vegan Protein by PEScience is a premium example of a plant-based protein powder that is specifically designed to overcome the common drawbacks of vegan formulas. It uses a precise blend of pea and brown rice protein to create a protein that closely mirrors the amino acid profile of dairy-based whey, making it a top seller at our store due to its highly effective formula for muscle growth and recovery.
The product is soy-free, gluten-free, lactose-free, and non-GMO, catering to those with food sensitivities, allergies, or dietary preferences. It is also third-party tested for purity and quality assurance, ensuring it is free from contaminants. With only 110 calories per serving and a smooth, easily mixable consistency.
Key Ingredients
- Pea Protein Concentrate: A popular plant-based protein source known for its high protein content and digestibility. It provides a strong amino acid base.
- Brown Rice Protein Concentrate: This protein is used to complement the pea protein. Where pea protein may be weaker in a particular amino acid, brown rice protein is strong, and vice versa.
- Natural Flavors: Used to create the taste, as the brand prides itself on avoiding the "earthy" notes common in many plant proteins.
- Stevia Extract: A natural, zero-calorie sweetener derived from the stevia plant.
- Guar Gum & Salt: A thickening agent to improve texture and sea salt to enhance the overall flavor.
Key Benefits
- Delivers a complete amino acid profile via a thoughtful blend of pea and rice proteins.
- Provides 20 grams of complete plant protein per serving.
- No dairy, soy, gluten, or lactose—ideal for allergy-sensitive and vegan diets.
- Naturally sweetened and third-party tested for purity, with smooth texture and enjoyable flavors.
- Smooth texture and delicious flavors enhance the user experience.
Customer Reviews
My Go to Protein
“I have used this protein for my plant based protein for 3 years now and counting. I enjoy all the flavors especially the cinnamon and peanut butter. It mixes easily and i never get bloated or gassy. It’s a great clean protein with 20gs of protein per one scoop. If you are thinking about it go for it, it’s a great one.”
-Dan
Final Thoughts
Because whey protein originates from milk, its classification as dairy is clear. What matters most is how your body tolerates it. For those with lactose intolerance, specific whey isolates might remain a suitable option due to minimal lactose content.
A confirmed milk allergy makes all whey protein completely unsuitable and potentially dangerous. In that case, plant-based proteins offer a safe and effective alternative for meeting nutritional goals.
If you’re ready to continue your fitness journey without digestive setbacks, choose the protein option that best fits your needs and fuel your progress with confidence.
Strong Supplement Shop keeps the best protein powders and supplements in stock, so you can fuel your goals without ever missing a scoop.
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Written and Sponsored by Leonard Shemtob
Leonard Shemtob is President of Strong Supplements and a published author. Leonard has been in the supplement space for over 20 years, specializing in fitness supplements and nutrition. Leonard appears on many podcasts, written over 100 articles about supplements and has studied nutrition, supplementation and bodybuilding.
Leonard's articles have been published in many top publications around the web. Leonard enjoys weight training, playing basketball and yoga, and also enjoys hiking. In his free time he studies and works on improving himself. For more detailed information, visit his official blog.
Frequently Asked Questions

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- Zhou, S., Wang, M., Xu, C., Fan, J., Du, Q., Bu, D., Fan, R., Jiang, H., Han, R., & Yang, Y. (2025). Physicochemical properties and soluble whey protein composition of local and imported commercial ultra-high-temperature milk in China. Journal of Dairy Science, 108(6), 5558–5569.
- Foegeding, E. A., Davis, J. P., Doucet, D., & McGuffey, M. K. (2002). Advances in modifying and understanding whey protein functionality. Trends in Food Science & Technology, 13(5), 151–159.