Protein powders: ingredients, testing, and who each type is for
Protein powder is primarily a convenient way to help meet total protein needs. This guide separates total intake, protein quality, product testing, and marketing claims.
Protein powder is convenience, not magic. Total daily protein and resistance training matter more than branding. Choose a product you tolerate with a transparent label and credible product-specific testing when that matters to you.
Do you need a powder at all?
No. Protein powder is mainly a convenience tool. If you can consistently meet your protein needs with foods you tolerate and enjoy, a powder is optional.
Total intake matters more than branding
Protein supplementation can modestly improve gains in muscle mass and strength when paired with resistance training, especially when it helps raise otherwise inadequate total protein intake. The supplement works inside the larger context of training and total diet.
Whey, casein, plant proteins, and collagen
Whey and casein are complete dairy proteins. Plant products can work well too, especially when total essential amino acids and leucine are adequate. Collagen has a different amino-acid profile and should not automatically be treated as interchangeable with a complete protein source for meeting all daily protein needs.
Quality signals worth caring about
Look for a transparent ingredient panel, a protein amount that matches the label, and credible third-party certification when contamination risk matters. Certification is product-specific, so BOTH does not extend a brand-level testing claim to every SKU.
Affiliate disclosure
Some protein and amino-acid products linked by BOTH may generate affiliate revenue. That commercial relationship does not change whether a product is founder tested, third-party verified, or supported by product-specific evidence.
This guide discusses protein and protein supplementation at the category level. Product links do not mean BOTH has personally tested every SKU. Momentous Whey and BodyHealth PerfectAmino may have commercial relationships with BOTH; evidence, firsthand testing, and affiliate status are tracked separately.
Pros
- Convenient way to close a protein-intake gap
- Protein supplementation can modestly augment resistance-training gains when total intake benefits
- Many complete-protein options are easy to compare by label and certification
Cons
- A powder cannot compensate for poor overall nutrition or inconsistent training
- Product quality and third-party certification vary by SKU
- Marketing around timing and specialty blends can overstate differences that matter less than total intake
Who it's for
People who struggle to meet protein needs consistently through food alone or want a portable, predictable protein option.
Who should skip it
Anyone already meeting protein needs comfortably through food and who does not value the convenience of a powder.
Products
Momentous Whey Protein Isolate
Grass-fed whey protein isolate—a convenience option when whole-food protein is impractical.
Dietary protein supports muscle protein synthesis when intake is adequate. Whey is a complete protein source—that category evidence does not prove this isolate outperforms other adequate protein sources.
NSF Certified for Sport is reported by the manufacturer. BOTH has not independently verified batch testing for this product.
- • Whey protein isolate
- • NSF Certified for Sport (manufacturer-reported)
- • Dairy-free requirements
- • Budget-only shoppers
Included on the protein guide as a whey isolate option for readers comparing formats. Protein adequacy from food remains the baseline; BOTH has not tested this SKU.
PerfectAmino
Essential amino acid supplement—a different format from whey powder when comparing amino acid intake options.
Essential amino acids are building blocks of protein. Research on EAAs and muscle protein synthesis is distinct from claims about this specific PerfectAmino formulation.
- • Essential amino acid format
- • Lower-calorie amino acid option vs full protein serving
- • Travel-friendly format
- • Replacing adequate daily protein from food
- • Expecting creatine-like strength evidence
- • Anyone with relevant medical contraindications without clinician guidance
Contextual for protein and amino acid format decisions. EAAs are not interchangeable with complete protein for muscle protein synthesis goals. BOTH has not tested this SKU.
BOTH may earn a commission from some links on this page. That never changes our evidence standard or what we say about a product. Read our affiliate disclosure.
Sources
- Morton RW et al. British Journal of Sports Medicine (2018)—systematic review and meta-analysis of protein supplementation with resistance training
- Zhou H-H et al. International Journal of Sport Nutrition and Exercise Metabolism (2024)—network meta-analysis of protein supplementation with resistance training
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