AG1 vs Legion Genesis 2026: Honest Ingredient-by-Ingredient Comparison
| Category | Product | Why We Picked It | Price |
|---|---|---|---|
| 🥇 Most clinical trials | AG1 by Athletic Greens (30 servings) | NSF Certified for Sport, 4 RCTs, 83 ingredients | Check Price → |
| 🥈 Best transparency | Legion Genesis Greens Powder | 100% label disclosure, no blends, Labdoor tested | Check Price → |
| 🥉 Best budget greens | Nested Naturals Super Greens Powder | Organic, third-party tested, Amazon #1 best-seller greens | Check Price → |
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Quick answer: Legion Genesis wins on ingredient transparency and value — full label disclosure, no proprietary blends, Labdoor tested, at roughly half the price of AG1. AG1 Next Gen wins on third-party certification (NSF Certified for Sport) and has 4 company-sponsored RCTs vs 0 for Genesis. The choice: tested sport athletes should choose AG1. Everyone else wanting full transparency at a fair price should choose Genesis.
Comparison Table
| Criteria | AG1 Next Gen | Legion Genesis |
|---|---|---|
| Price/serving | ~$2.63 | ~$1.50 ✅ |
| Label transparency | Proprietary blends | 100% disclosed ✅ |
| Third-party testing | NSF Certified for Sport ✅ | Labdoor tested |
| Clinical trials | 4 (company-funded) | 0 |
| Vitamin D per serving | 40 IU | 1,000 IU ✅ |
| Probiotics | 7.2B CFU, 12 strains | 5B CFU, disclosed strains ✅ |
The Transparency Problem with AG1
AG1 uses proprietary blends for most of its 83 ingredients. You cannot verify whether ashwagandha, rhodiola, lion’s mane, or any other adaptogen is at a clinically effective dose. NSF Certified for Sport confirms label accuracy and absence of banned substances — it does not confirm clinical dosing. Legion Genesis discloses every ingredient with exact amounts, so you can verify each one against published research.
The Vitamin D Problem
AG1 Next Gen provides 40 IU vitamin D per serving. Clinical trials showing benefits used 1,000–4,000 IU. At 40 IU, you’re getting approximately 1–4% of a therapeutic dose — present for marketing purposes, not clinical effect. Legion Genesis provides 1,000 IU — still conservative but 25 times more meaningful than AG1.
Who Should Buy Each
- AG1: Tested sport athletes needing NSF certification across all supplements; people paying for a single all-in-one vs multiple separate products; frequent travellers wanting convenient stick packs.
- Legion Genesis: Anyone wanting to verify every ingredient dose against research; buyers unwilling to pay premium without full transparency; anyone not in a tested sport.
- Neither: If you eat a varied diet and already take vitamin D, omega-3s, and magnesium separately — a greens powder adds marginal value for most people at any price.
See our full AG1 review. See our affiliate disclosure.
As an Amazon Associate, Sci-Supplements earns from qualifying purchases. See our affiliate disclosure.
📚 Related articles
AG1 Athletic Greens Review 2026Read →Best Probiotic Supplements 2026Read →Supplement Stacking GuideRead →📚 Clinical research sources
- 1Frugé AD, et al. (2024). Athletic Greens supplementation improves gut microbiome diversity: a randomized, double-blind, placebo-controlled trial. J ISSN, 21(1), 1. View source →PubMed
- 2Holick MF. (2007). Vitamin D deficiency. N Engl J Med, 357(3), 266–281. View source →PubMed
- 3Serban MC, et al. (2016). Spirulina supplementation on plasma lipid concentrations. Clin Nutr, 35(4), 842–851. View source →PubMed
