Thorne leads this first field because the formula is disclosed, the major actives are present at interpretable amounts and NSF lists the exact product. The score is not an instruction to take it: 200 mg caffeine is material, alpha-GPC evidence is less settled than caffeine, and tolerance varies.
Score breakdown
| Area | Finding | Score |
|---|---|---|
| Formulation | Disclosed, coherent doses across key actives | 24 / 25 |
| Transparency | No proprietary active blend | 20 / 20 |
| Laboratory verification | Exact NSF product listing | 20 / 20 |
| Safety | Clear caffeine amount; still user-sensitive | 13 / 15 |
| Company reliability | External record supports the label | 9 / 10 |
| Value | Premium price for a complex formula | 5 / 10 |
Formula and label
Per two-scoop serving, Thorne lists 5 g L-citrulline, 3,2 g beta-alanine, 600 mg alpha-GPC, 200 mg caffeine and 200 mg L-theanine. Full disclosure is a major strength. Evidence is strongest for caffeine and beta-alanine across repeated use; a single serving does not make every component equally important.
Laboratory and certification trail
NSF Certified for Sport lists the exact Rainbow Sherbet product. That supports identity, label and banned-substance risk management. It does not establish that the combined formula produces a clinically meaningful benefit for every user.
Company accountability
The page exposes each active dose and the external certificate can be independently checked. The score ignores athlete endorsements and “clean energy” language.
Where this fits
This is a serious, higher-cost pre-workout for people who have a reason to want the full formula. Training quality, sleep and total caffeine intake matter more than adding a pre-workout by default.
Limits and update trigger
No taste test, purchased-lot assay or individual safety assessment. Avoid combining with other caffeine without accounting for the total.
Evidence register
Source rule: Manufacturer pages establish the current label and company claims. Independent directories establish only the certification, product, region and batches they actually list. Popularity, awards and affiliate economics add zero points.
Official product page
No retailer or affiliate relationship is active on this page. Price, formula, serving size and certification can differ by country and variant.
Check the manufacturer page ↗