Protein Powder

Optimum Nutrition Gold Standard 100% Casein

• 82/100 science score
• $40 price

Overview

This product excels in effectiveness with 24g micellar casein aligning precisely with ISSN-recommended 20-40g doses for MPS, backed by position stands synthesizing 100+ RCTs on protein supplementation showing 5-20% gains in muscle mass/strength. Safety is robust with no product-specific adverse events in FDA databases and clean safety profile in milk protein trials (e.g., 53 RCTs in 2025 meta-analysis). Quality is strong via Informed Choice certification ensuring purity, though lacks NSF gold-st

Key strengths

• Informed Choice certified with recent batches tested (e.g., exp. 2027)
• Exact 24g micellar casein meets ISSN 20-40g MPS dose
• $1.71/serving (4lb tub, 53 servings) matches category average $1-2

Our analysis

Optimum Nutrition Gold Standard 100% Casein is an excellent slow-digesting protein delivering 24g micellar casein at the ISSN-proven 20-40g dose for overnight MPS. Informed Choice certification ensures purity with no FDA safety issues. Strong value at $1.71/serving comparable to peers.

Frequently asked questions

Is Optimum Nutrition Gold Standard 100% Casein worth buying?

Optimum Nutrition Gold Standard 100% Casein has a Verify Influencers trust score of 82/100 based on ingredient quality, clinical evidence, and third-party testing.

What is the trust score for Optimum Nutrition Gold Standard 100% Casein?

Optimum Nutrition Gold Standard 100% Casein scored 82 out of 100 in our science-backed analysis, which evaluates ingredient dosages against clinical literature and manufacturing transparency.

Browse all scored products · How products are scored