Rainbow Light supplements, graded by the human studies
We graded 3 Rainbow Light products against the human studies of their ingredients, the dose on each label and what buyers say in their reviews. Each grade belongs to the product and the goal it was graded for: we do not grade how Rainbow Light makes, tests or sells its products, and we sell no supplements. Educational, not medical advice.
The Rainbow Light products we graded
Members Only3 products, strongest evidence first
What Rainbow Light products were graded for
Each goal links to its page, with every product graded for it
| Goal | Rainbow Light products |
|---|---|
| Digestion and Bloating | 1 |
| Energy | 1 |
| Regularity: Long-Term Relief | 1 |
Read more
Our articles on these goals
- How to Improve Gut Health Naturally: Fiber, Foods and the Probiotic Strains With Human TrialsArticle · Sep 15, 2026
- Best Probiotic for Bloating: The Strains With Human Trials, and How to Choose OneArticle · Oct 27, 2026
- Best Vitamins for Fatigue and the Habits That Matter MoreArticle · Jun 15, 2026
Questions people ask
Members Only
Is Rainbow Light a good brand?
We grade products, not brands, and we sell none. Of the 3 Rainbow Light products we graded, 1 is Tier 3 (Reviewed) and 2 are Tier 4 (Emerging). One is top-ranked for the goal it was graded for. Each product's grade, the studies behind it and its label are on its own page.
Which Rainbow Light products have the strongest evidence?
By our grades: Women's One (Tier 3, graded for energy); Daily Fiber + Probiotic Powder (Organic) Raspberry Lemon Flavor, . (312 g) (Tier 4, graded for regularity: long-term relief); Kids Liquid Probiotic 3 Billion CFU Unflavored (Organic), (Tier 4, graded for digestion and bloating). A product's grade is for the goal it was graded for, at the dose on its label.
How does Reverse Age Lab grade Rainbow Light products?
Each product is graded for a goal on the human studies of its ingredients at the dose on its label, what buyers say in their reviews and what our panel of ten biohackers has said. The grade belongs to the product. We do not grade how Rainbow Light makes, tests or sells its products, and we are not affiliated with Rainbow Light.
Can I take Rainbow Light supplements with my meds?
Some supplements can interact with meds. Members have every product checked against the meds in their Health Profile before it joins their protocol.
Educational, not medical advice. Grades come from human studies on PubMed, the dose on each label, store reviews we read ourselves and our biohacker panel, and are updated as new studies arrive. Rainbow Light is a trademark of its owner; Reverse Age Lab is not affiliated with it and sells no supplements. How we grade →
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