Looking for the best whey protein powder for building muscle is pretty subjective because the word "best" differs based on opinion, taste or feeling but for me, the best whey powder would be a protein which meets some or all of these criterias:

Doesn't have artificial sweeteners and flavors. Artificial sweeteners like sucralose and acesulfame potassium are the most common fake sugars in supplements nowadays and are 600 times and 200 times sweeter than table sugar respectively. These sweeteners are questionable for health as to their long term usage and the majority of people who consume them are prone to side effects like migraines, headaches and dizziness. If you want to bypass those, you have to look for a natural whey protein. A natural whey protein doesn't have any sweetener at all or use natural sweeteners like stevia, luo han guo or cane sugar.

Doesn't have garbage fillers, instead they should be a pure whey protein isolate or whey protein concentrate or a mixture of both. More and more ingredients in a supplement doesn't mean you're getting the best, on the contrary, a lot of these are just additives. The natural whey protein doesn't have a lot of ingredients as its main focus is on health, for example if you find only whey protein isolates or concentrates in a product, you will know it's natural and is a quality supplement.

Has been cold pressed, hence they have not been denatured as no heating was done to the whey protein during the manufacturing process. If you see something like cross-flow microfiltered(CFM) whey protein on a supplement, you can vouch it's of high-quality. This type of protein has been cold processed and ultrafiltered using acid and bleach-free processing environment.

Below is my list of the 29 best whey protein powder for building muscle. There is a mixture of both whey protein isolate and whey protein concentrate or a whey concentrate/isolate blend and all of them are 100% natural.


(1) ProMix Nutrition Grass-Fed Vanilla Whey Protein, 10 Pound Bulk

ProMix Nutrition Grass-Fed Vanilla Whey Protein, 10 Pound Bulk

(2) Raw Grass Fed Whey 5LB - Happy Healthy Cows, COLD PROCESSED Undenatured 100% Grass Fed Whey Protein Powder, GMO-Free (5 LB)

Raw Grass Fed Whey 5LB - Happy Healthy Cows, COLD PROCESSED Undenatured 100% Grass Fed Whey Protein Powder, GMO-Free (5 LB)

(3) Raw Organic Whey - USDA Certified Organic Whey Protein Powder, Happy Healthy Cows, COLD PROCESSED Undenatured 100% Grass Fed Organic Whey Protein Powder, NON-GMO (5 LB)

Raw Organic Whey - USDA Certified Organic Whey Protein Powder, Happy Healthy Cows, COLD PROCESSED Undenatured 100% Grass Fed Organic Whey Protein Powder, NON-GMO (5 LB)

(4) swiig Daily Whey Matrix Chocolate - 20lb by Performance Food Centers

swiig Daily Whey Matrix Chocolate - 20lb by Performance Food Centers

(5) Nature's Best Isopure Natural Whey Protein Isolate Powder Natural Chocolate -- 7.5 lbs

Nature's Best Isopure Natural Whey Protein Isolate Powder Natural Chocolate -- 7.5 lbs

(6) PROMIX Undenatured Cold Processed Grass Fed Whey Protein Isolate 5 Lbs

PROMIX:Undenatured Grass Fed Whey Isolate.Cold Processed with Multi-stage Micro-filtration.30G Protein/6.9G BCAA/.5G Fat/2G Carbs/Lactose<1g/serving.Easy to Mix.(5 lb bulk).69 Servings.Unflavored

(7) Muscle Feast Cappuccino Whey Protein Isolate - 5lbs

Muscle Feast Cappuccino Whey Protein Isolate - 5lbs

(8) Integrated Supplements CFM Whey Protein Isolate 2 Lbs

Integrated Supplements CFM Whey Protein Isolate Diet Supplement, Dutch Chocolate, 2 Pound

(9) Now Foods 100% Pure Whey Protein Isolate 5 Lbs

NOW Foods Whey Protein Isolate, 100% Pure 5Lb (Packaging May Vary)

(10) ALLMAX Nutrition Whey Protein Isolate Unflavored -- 5 lbs

ALLMAX Nutrition Whey Protein Isolate Unflavored -- 5 lbs

(11) Whey Protein Isolate Original Bluebonnet 2.2 Lbs Powder

Whey Protein Isolate Original Bluebonnet 2.2 Lbs Powder

(12) SDC Nutrition About Time Whey Protein Isolate, Chocolate, 2 Pound

SDC Nutrition About Time Whey Protein Isolate, Chocolate, 2 Pound

(13) Bodylogix Natural Whey Protein Nutrition Shake, Isolate Dark Chocolate, 1.85 Pound

Bodylogix Natural Whey Protein Nutrition Shake, Isolate Dark Chocolate, 1.85 Pound

(14) Naked Nutrition 100% Grass-Fed Whey Protein Concentrate Powder - 5lb Bulk

NAKED WHEY - 100% Grass-Fed Whey Protein Powder - 5lb Bulk

(15) Ascent Native Fuel Whey Protein Powder - Vanilla Bean - 4 lbs

Ascent Native Fuel Whey Protein Powder - Vanilla Bean - 4 lbs -Promote Muscle Repair and Recovery - Made with Native Whey - Zero Artificial Ingredients - Gluten Free

(16) Mike's Mix All-Natural, Unflavored Whey Protein Concentrate - 4lb Bulk Bag

Mike's Mix All-Natural, Unflavored Whey Protein Concentrate-4 lbs

(17) Glacier Nutrition Pure Vanilla Whey Protein Isolate Powder – 840 g – No Dairy, Gluten, Soy, or Preservatives

Glacier Nutrition Pure Vanilla Whey Protein Isolate Powder - 840 g - No Dairy, Gluten, Soy, or Preservatives

(18) Hormone Free Grass Fed Unflavored Whey Protein Isolate 5lb

Hormone Free Grass Fed Unflavored Whey Protein Isolate 5lb

(19) Protein Factory Whey Isolate 5 lbs. Plain

Protein Factory Whey Isolate 5 lbs. Plain

(20) Muscle Feast 100% Whey Vanilla - 5lbs

Muscle Feast 100% Whey Vanilla - 5lbs

(21) NutraBio Natural 100% Whey Protein Isolate - Sweetened with Stevia - 2 pounds Vanilla – NO Soy, NO Whey Concentrate, NO Amino Acid Spiking just 100% Pure WPI.

NutraBio Natural 100% Whey Protein Isolate - Sweetened with Stevia - 2 pounds Vanilla - NO Soy, NO Whey Concentrate, NO Amino Acid Spiking just 100% Pure WPI.

(22) Hormone Free Grass Fed Chocolate Whey Protein Concentrate 5lb

Hormone Free Grass Fed Chocolate Whey Protein Concentrate 5lb

(23) JOHN'S KILLER PROTEIN - PREMIUM WHEY PROTEIN. Our 100% Natural & Unadulterated Whey. GMO Free, Gluten Free, Soy Free, Lecithin Free, Growth Hormones Free Sweeteners and Artificial Additives Free.

JOHN'S KILLER PROTEIN - PREMIUM WHEY PROTEIN. Our 100% Natural & Unadulterated Whey. GMO Free, Gluten Free, Soy Free, Lecithin Free, Growth Hormones Free Sweeteners and Artificial Additives Free.

(24) TGS All Natural 100% Whey Protein Powder - Unflavored, Undenatured, Unsweetened - Low Carb, Soy Free, Gluten Free, GMO Free - 2lb

TGS All Natural 100% Whey Protein Powder - Unflavored, Undenatured, Unsweetened - Low Carb, Soy Free, Gluten Free, GMO Free - 2lb

(25) Grass Fed Whey Protein - 100% Pure, Natural & Raw – 24g High Protein - 1.34lb/16 Servings - COLD PROCESSED Undenatured - Non-GMO, rBGH, Gluten & Soy Free - Highest Quality Wisconsin USA - Unflavored

Grass Fed Whey Protein - 100% Pure, Natural & Raw – 24g High Protein - 1.34lb/16 Servings - COLD PROCESSED Undenatured - Non-GMO, rBGH, Gluten & Soy Free - Highest Quality Wisconsin USA - Unflavored

(26) BioTrust Platinum1 Premium Grass Fed Whey Protein, Ultra-Pure, Ultra-Clean, 100% Hydrolyzed Whey Protein Isolate - Chocolate Ice Cream

BioTrust Platinum1 Premium Grass Fed Whey Protein, Ultra-Pure, Ultra-Clean, 100% Hydrolyzed Whey Protein Isolate - Chocolate Ice Cream

(27) Whey Fantastic 5LB 100% Premium Grass Fed Whey Protein | Gluten & Soy Free, Non-GMO, Undenatured, Paleo Friendly | Stimulate Muscle Growth & Recovery | Unflavored Bulk - 75 Servings

Whey Fantastic 5LB 100% Premium Grass Fed Whey Protein | Gluten & Soy Free, Non-GMO, Undenatured, Paleo Friendly | Stimulate Muscle Growth & Recovery | Unflavored Bulk - 75 Servings

(28) Flexatarian 100% Whey Protein, Chocolate, 5 Pound

Flexatarian 100% Whey Protein, Chocolate, 5 Pound

(29) 100% Grass Fed Whey Protein - Hormone Free | Stacked with Isolate, Concentrate and Hydrolyzed Whey Protein | 4.5g of BCAA's Per Serving (5lb, Chocolate)

100% Grass Fed Whey Protein - Hormone Free | Stacked with Isolate, Concentrate and Hydrolyzed Whey Protein | 4.5g of BCAA's Per Serving (5lb, Chocolate)