# Raspberry Ketone (Rubus idaeus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/raspberry-ketone
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Fruit
**Also Known As:** 4-(4-hydroxyphenyl)butan-2-one, Rubus idaeus ketone, Red raspberry ketone, RK, Raspberry aromatic compound, 4-(p-hydroxyphenyl)-2-butanone, Rheosmin

## Overview

Raspberry ketone (4-(4-hydroxyphenyl)-2-butanone) is the primary aromatic compound in red raspberries (Rubus idaeus) that has been studied for its potential role in lipid [metabolism](/ingredients/condition/weight-management). Its proposed mechanisms involve activation of peroxisome proliferator-activated receptor alpha (PPAR-α) and suppression of lipogenic enzymes, though evidence remains limited to preclinical models.

## Health Benefits

• May support lipid [metabolism](/ingredients/condition/weight-management) through PPAR-α activation (preliminary rodent evidence only)
• Potential [antioxidant](/ingredients/condition/antioxidant) effects by boosting SOD and lowering MDA/TNF-α (in vitro and animal studies)
• May influence adipogenesis by suppressing lipogenic genes like ACC1, FASN, and SCD1 (3T3-L1 cell studies)
• Possible [hepatoprotective](/ingredients/condition/detox) effects through reduced lipid accumulation (rodent models only)
• May enhance lipolysis via upregulation of ATGL, HSL, and CPT1B (preclinical evidence)

## Mechanism of Action

Raspberry ketone (4-(4-hydroxyphenyl)-2-butanone) is proposed to activate PPAR-α, a nuclear receptor that upregulates fatty acid oxidation genes in hepatic and adipose tissue. In 3T3-L1 adipocyte cell studies, it downregulates lipogenic enzymes acetyl-CoA carboxylase 1 (ACC1), fatty acid synthase (FASN), and stearoyl-CoA desaturase 1 (SCD1), collectively reducing de novo lipogenesis. Additionally, in vitro and animal data suggest it enhances [antioxidant](/ingredients/condition/antioxidant) defense by increasing superoxide dismutase (SOD) activity while reducing malondialdehyde (MDA) and the [pro-inflammatory cytokine](/ingredients/condition/inflammation) TNF-α.

## Clinical Summary

No published human randomized controlled trials have isolated raspberry ketone as a single ingredient to assess efficacy for weight loss or lipid management. Most available evidence derives from rodent studies and in vitro 3T3-L1 adipocyte models, which demonstrated suppression of lipogenic gene expression but cannot be directly extrapolated to human physiology. One small human study included raspberry ketone within a multi-ingredient proprietary blend (RCT, n=70), making it impossible to attribute observed effects to raspberry ketone alone. The overall evidence base is currently insufficient to support definitive clinical claims for any indication in humans.

## Nutritional Profile

Raspberry ketone (4-(4-hydroxyphenyl)-2-butanone) is the primary aromatic compound of red raspberries (Rubus idaeus), present naturally at very low concentrations of approximately 1–4 mg/kg of fresh fruit. As a phenolic compound (molecular weight 164.20 g/mol), it is not a significant source of macronutrients itself. Within the whole fruit context, fresh red raspberries (per 100 g) provide approximately: 52 kcal energy; 1.2 g protein; 0.65 g fat; 11.9 g carbohydrates (of which ~4.4 g sugars); 6.5 g dietary fiber (notably high, including soluble pectin and insoluble cellulose/hemicellulose); Vitamin C ~26.2 mg (29% DV); Vitamin K ~7.8 µg (7% DV); Vitamin E ~0.87 mg (6% DV); Folate ~21 µg (5% DV); Manganese ~0.67 mg (29% DV); Magnesium ~22 mg (5% DV); Potassium ~151 mg (3% DV); Iron ~0.69 mg (4% DV); Phosphorus ~29 mg (3% DV). Key bioactive compounds in whole raspberries include: ellagitannins (primarily ellagic acid conjugates, ~30–80 mg/100 g), anthocyanins (cyanidin-3-sophoroside, cyanidin-3-glucoside, cyanidin-3-rutinoside; total ~20–60 mg/100 g depending on cultivar and ripeness), quercetin glycosides (~1–5 mg/100 g), kaempferol derivatives, tiliroside, and phenolic acids (p-coumaric, ferulic, caffeic acids). Supplemental raspberry ketone products typically deliver 100–500 mg per capsule — vastly exceeding what could be obtained from whole fruit consumption (one would need ~100–500 kg of fresh raspberries to obtain 100–500 mg). Commercially available raspberry ketone supplements are almost exclusively synthetically derived (from p-hydroxybenzaldehyde and acetone via aldol condensation) rather than extracted from fruit. Bioavailability notes: Raspberry ketone is lipophilic and appears to be readily absorbed in animal models, undergoing phase II [metabolism](/ingredients/condition/weight-management) (glucuronidation and sulfation) with metabolites detected in urine. However, human pharmacokinetic data are essentially absent. The natural raspberry ketone in whole fruit is present alongside a complex polyphenol matrix that may influence absorption kinetics. Ellagitannins from whole raspberries are poorly absorbed intact but are converted by gut microbiota to urolithins (urolithin A, B), which have demonstrated bioactivity and improved bioavailability. Anthocyanin bioavailability from raspberries is generally low (estimated <2% absorption), though colonic metabolites (protocatechuic acid, phenylacetic acid derivatives) may contribute to systemic effects.

## Dosage & Preparation

No clinically studied human dosages exist. Rodent studies used 165-500 mg/kg orally. Commercial supplements recommend 100-1400 mg/day, which exceeds the toxicological threshold of concern (1800 μg/day) by up to 56-fold. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Raspberry ketone shares structural similarity with synephrine and capsaicin, raising theoretical concerns about sympathomimetic effects such as elevated heart rate or [blood pressure](/ingredients/condition/heart-health) at high supplemental doses, though this has not been systematically studied in humans. No well-documented drug interactions have been confirmed, but caution is warranted in individuals taking anticoagulants (e.g., warfarin) or stimulant medications, as preclinical data suggest possible platelet and adrenergic activity. Raspberry ketone is not recommended during pregnancy or lactation due to a complete absence of safety data in these populations. Typical supplemental doses range from 100–400 mg/day, far exceeding dietary exposure from whole raspberries, which contain only approximately 1–4 mg/kg of fruit.

## Scientific Research

No human clinical trials, randomized controlled trials (RCTs), or meta-analyses were identified in the available research. Evidence is limited to preclinical in vitro and rodent studies, with one mouse obesity study showing body weight effects at 165-500 mg/kg doses over 10 days, though this also elevated ALT and [blood glucose](/ingredients/condition/weight-management) levels.

## Historical & Cultural Context

No traditional medicinal uses of raspberry ketone are documented in the available sources. Its research interest stems from modern nutraceutical exploration for obesity and metabolic health rather than historical folk medicine applications.

## Synergistic Combinations

Green tea extract, Garcinia cambogia, L-carnitine, Conjugated linoleic acid (CLA), Caffeine

## Frequently Asked Questions

### Does raspberry ketone actually burn fat in humans?

There is currently no credible human clinical trial demonstrating that isolated raspberry ketone burns fat in humans. All fat-loss mechanisms, including PPAR-α activation and ACC1/FASN suppression, have been observed only in rodent models or 3T3-L1 cell cultures, which do not reliably predict human outcomes. Consumers should treat weight-loss claims with significant skepticism until rigorous human RCTs are conducted.

### What is the recommended dosage of raspberry ketone supplements?

Most commercial raspberry ketone supplements provide 100–400 mg per day, with some formulations reaching up to 500 mg, but no human clinical dose-response studies exist to validate these amounts as safe or effective. Whole red raspberries contain only about 1–4 mg of raspberry ketone per kilogram of fruit, meaning supplements deliver doses hundreds of times higher than any dietary exposure. Without established human pharmacokinetic data, an evidence-based optimal dosage cannot currently be recommended.

### How does raspberry ketone differ from ketones produced during ketosis?

Raspberry ketone (4-(4-hydroxyphenyl)-2-butanone) is a phenolic aromatic compound derived from red raspberries and is structurally and metabolically unrelated to endogenous ketone bodies such as beta-hydroxybutyrate (BHB), acetoacetate, and acetone produced during nutritional ketosis or fasting. Consuming raspberry ketone does not raise blood ketone levels or replicate the metabolic state of ketosis. The shared name is a marketing coincidence based on the chemical 'ketone' functional group, not a shared biological function.

### Can raspberry ketone interact with blood thinners like warfarin?

No confirmed human pharmacokinetic studies have documented a direct interaction between raspberry ketone and warfarin, but theoretical concern exists based on raspberry ketone's structural similarity to compounds with mild adrenergic and platelet-modulating properties observed in preclinical models. Individuals taking anticoagulants or antiplatelet drugs should consult a physician before use, as even modest additive effects could alter bleeding risk. Given the absence of interaction data, erring on the side of caution is advised.

### Is raspberry ketone safe during pregnancy?

Raspberry ketone has not been evaluated for safety in pregnant or breastfeeding individuals in any published clinical research, making its risk profile entirely unknown in these populations. Its structural similarity to synephrine raises a theoretical concern about sympathomimetic cardiovascular effects that could be relevant during pregnancy. Until adequate safety data exist, raspberry ketone supplements should be avoided during pregnancy and lactation as a precautionary measure.

### What does scientific research actually show about raspberry ketone's effectiveness in humans?

Most evidence for raspberry ketone comes from laboratory cell studies and animal models, with very limited human clinical trials. The few human studies that exist show minimal or inconsistent fat-loss results, and many effects observed in rodents (such as PPAR-α activation and reduced hepatic lipid accumulation) have not been reliably demonstrated in people. The gap between promising preliminary research and real-world human outcomes is substantial, making it difficult to claim significant health benefits based on current evidence.

### Can I get raspberry ketone from eating raspberries, or do I need a supplement?

Fresh raspberries contain raspberry ketone, but in very small amounts—you would need to consume impractically large quantities (roughly 100 pounds of fresh raspberries) to match a typical supplement dose. This is why nearly all raspberry ketone research relies on isolated or concentrated supplement forms rather than whole fruit consumption. If you want the potential benefits studied in clinical settings, supplementation is the only realistic option.

### Who is most likely to benefit from taking raspberry ketone supplements?

Currently, there is insufficient evidence to definitively recommend raspberry ketone for any specific population, though theoretical candidates might include individuals interested in metabolic support or antioxidant effects. However, claims of weight loss or fat-burning benefits in humans remain largely unproven, so realistic expectations should be set before supplementation. Those with liver conditions, those taking blood thinners, or pregnant/nursing individuals should consult a healthcare provider before use, as safety data in these groups is limited.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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