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Raspberry Ketones
A fragrance compound from raspberries marketed for fat loss. The honest verdict: there are NO human efficacy trials — weight-loss claims rest entirely on animal/cell studies and high-dose multi-ingredient products. Essentially unproven in people.
What the evidence says
Most Raspberry Ketones studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from medium-quality studies published 2015–2023.
Based on 3 studies
Confidence
Very lowBy outcome
Raspberry Ketones has an evidence score of 2/10 — emerging evidence based on 3 indexed studies. A fragrance compound from raspberries marketed for fat loss. The honest verdict: there are NO human efficacy trials — weight-loss claims rest entirely on animal/cell studies and high-dose multi-ingredient products. Essentially unproven in people. Representative study: PMID 26160596.
The commonly studied dose of Raspberry Ketones is Marketed at 100-1400mg daily — but no efficacy is established in humans. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
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Last reviewed June 2026 · evidence from 3 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Raspberry ketone (rheosmin) is the aroma compound of red raspberries, popularized as a 'fat-burner' after rodent studies and TV promotion. The honest reality: there are NO published human efficacy trials for weight loss. The marketing rests on animal and cell studies (where it altered fat metabolism at doses far beyond any dietary amount) and on multi-ingredient 'fat-burner' products where any effect can't be attributed to raspberry ketone. Human safety data are also limited. It is, in short, clinically unproven.
Increased fat breakdown in cell/animal models at high doses — not shown in humans.
Proposed norepinephrine-mediated fat metabolism — unconfirmed in people.
How Raspberry Ketones works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Marketed at 100-1400mg daily — but no efficacy is established in humans
Take with food
| Form | Type |
|---|---|
| 💊Not recommended (no human efficacy evidence) | Recommended |
Clinically unproven.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: No proven benefit/dose.
Dose-response data unavailable. The current published research for Raspberry Ketones does not provide sufficient dose-specific outcome data to generate reliable dose-response curves.
Refer to the Dosage & Timing section above for recommended dose ranges based on available evidence.
No human trials support weight loss.
Fat-metabolism effects only in animals/cells at high doses.
Avoid — no data.
Raspberry ketone is often combined with caffeine/stimulants — assess the whole product.
Tip: Use conservatively if at all
The best time to take Raspberry Ketones is with meals. Take it with food. Note: no human-trial-validated dose or benefit exists.
Raspberry Ketones is generally safe at recommended doses, with a few precautions worth noting. The most commonly reported side effects are limited human safety data. Use caution if any of these apply to you: Pregnancy/breastfeeding (no data); Often sold in stimulant 'fat-burner' blends — check other ingredients.
Activates AMPK to regulate blood sugar, improve insulin sensitivity, and support lipid metabolism — comparable to metformin in some trials.
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