2026 Clinical Sports Nutrition Directory • FTC 16 CFR § 255
Athletes prioritizing clean macronutrient sources benefit from pasture-raised, hormone-free dairy yielding naturally higher immunoglobulins and lactoferrin. Here are the top third-party verified grass-fed isolates evaluated for protein purity.
| Supplement & Score | Price / Serving | 30-Day Supply | Macros (P / C / F) | Formula Highlights | Verified Offer |
|---|---|---|---|---|---|
| Top Protein Density |
$1.95
per serving
|
$58.50/mo
$1.74 / 25g P
| Protein: 28g Carbs: 0g Fats: 0g |
| Check Price → |
|
$1.85
per serving
|
$55.50/mo
$1.65 / 25g P
| Protein: 28g Carbs: 1g Fats: 0.5g |
| Check Price → | |
| Best Overall Value |
$1.35
per serving
|
$40.50/mo
$1.41 / 25g P
| Protein: 24g Carbs: 3g Fats: 1.5g |
| Check Price → |
Take our interactive Smart Stack Quiz to calculate your tailored 3-supplement stack based on budget, stimulant tolerance, and dietary restrictions.
Compute your exact Basal Metabolic Rate, daily macronutrient targets, hydration needs, and goal-matched lab-verified supplementation stack.
Optimum Nutrition Gold Standard 100% Whey offers the lowest cost per serving in our comparison at $1.35 per serving, featuring Primary source Whey Protein Isolate with concentrate blend.
Transparent Labs 100% Grass-Fed Isolate leads our lab comparison with 100% Grass-fed, hormone-free New Zealand dairy cows, Zero artificial sweeteners, food dyes, or unnecessary fillers, 93% protein-by-weight purity ratio — optimal for cutting diets at $1.95 per serving.
Transparent Labs 100% Grass-Fed Isolate provides 28g protein, 0g carbohydrates, and 0g fat per serving.
Compare hydrolyzed and CFM whey protein isolates audited for lactose removal, digestive enzymes, and gastric comfort with zero stomach distress.
Discover the highest protein-to-calorie whey isolates with zero fillers, tested for macro accuracy during a caloric deficit.
Compare hydrolyzed collagen peptides and UC-II collagen for connective tissue remodeling, tendon tensile strength, and heavy load tolerance.
Compare top creatine monohydrate powders: audited for Creapure purity, ATP resynthesis speed, solubility, and price per 5g serving.