By goal
Evidence-Backed Supplements for Weight Loss and Fat Burning
No supplement melts fat on its own, and the research here ranges from modest, real effects to outright debunked. We've graded each option by what controlled trials actually show, so you can see which ones offer small metabolic or appetite benefits alongside diet and exercise, and which popular fat burners are marketing rather than medicine.
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Best-supported here: Caffeine (Strong), Psyllium (Fiber) (Strong), Alpha-Lipoic Acid (Mixed), Apple (Moderate) — each graded below by the weight of human evidence.
| Supplement | Evidence for this goal | Typical dose | Key caution | Studies |
|---|---|---|---|---|
| Caffeine | Strong for this goal | 3–6 mg/kg pre-exercise for ergogenic effect; ≤400 mg/day generally safe… | Safe ≤400 mg/day for most adults. | 20 |
| Psyllium (Fiber) | Strong | For cholesterol/heart health: ~7 g/day of soluble fiber (about 10.2 g o… | Generally safe and well tolerated; the most common side effects are bloating, flatulence, a… | 10 |
| Alpha-Lipoic Acid | Moderate for this goal | Oral: 300-600 mg/day (commonly 600 mg, often divided and taken on an em… | Generally well tolerated; the most common side effects are mild gastrointestinal upset (nau… | 19 |
| Apple | Moderate | One medium apple (~182 g) per day, eaten whole with skin where most pol… | Generally very safe. | 9 |
| Ashwagandha | Moderate | 300–600 mg/day of root extract (standardized to 5% withanolides), often… | Avoid in pregnancy (traditionally abortifacient) and while breastfeeding. | 18 |
| Avocado | Moderate | Roughly half to one whole avocado per day (about 100-150 g); cohort ben… | Generally very safe as a whole food. | 9 |
| Banana | Moderate | 1 medium banana (about 118 g edible) provides roughly 105 kcal and 422… | Generally very safe. | 9 |
| Berberine | Moderate for this goal | 500 mg, 2–3× daily with meals (1,000–1,500 mg/day total). | Common GI upset and cramping. | 18 |
| Blackberry | Moderate | A common serving is 1 cup (about 144 g, ~62 kcal). Dietary patterns and… | Generally very safe as a whole food. | 11 |
| Blackcurrant | Moderate | About 1 cup fresh berries (110-150 g); ergogenic/eye-health trials use… | Generally safe as food. | 10 |
| Blueberry | Moderate | A typical serving is 1 cup (148 g) of fresh berries; trials showing vas… | Generally very safe as a food. | 8 |
| Cantaloupe Melon | Moderate | 1 cup diced (~160 g) to half a medium melon; ~150-300 g typical serving | Generally very safe as a food. | 9 |
| Cranberry | Moderate | A standard culinary serving is about 1 cup (100 g) of fresh raw berries… | Generally safe as a food. | 8 |
| Ginger | Moderate | 1–1.5 g/day of dried ginger powder in divided doses (typically 250 mg,… | Generally well tolerated at culinary and supplemental doses; the most common side effects a… | 18 |
| Grapefruit | Moderate | A typical serving is half a medium grapefruit (~123 g) or one whole fru… | Clinically important: grapefruit furanocoumarins irreversibly inhibit intestinal CYP3A4, ra… | 7 |
| Green Tea Extract (EGCG) | Moderate for this goal | Commonly 250-500 mg/day of standardized extract providing roughly 100-3… | Concentrated green tea EXTRACTS (unlike ordinary brewed tea) carry a rare but documented ri… | 19 |
| Guava | Moderate | One to two whole fruits daily (about 55-165 g) as part of a varied diet… | Generally safe as a food. | 6 |
| Inositol (Myo-Inositol) | Moderate | PCOS: typically 2 g myo-inositol twice daily (4 g/day), often with 400… | Generally well tolerated; the most common side effects are mild, dose-related gastrointesti… | 14 |
| L-Theanine | Moderate | 100–200 mg; often paired 1:2 with caffeine (e.g. 100mg theanine + 50mg… | Very safe, no known serious side effects. | 16 |
| Papaya | Moderate | A typical serving is 1 cup of cubes (about 145 g) or roughly half a sma… | Papaya can trigger allergy in latex-sensitised individuals (latex-fruit syndrome) via cross… | 11 |
| Pear | Moderate | One medium pear (~178 g) provides ~5.5 g fibre, roughly a fifth of the… | Generally very safe. | 8 |
| Spirulina | Moderate for this goal | Commonly 1-8 g/day (some trials up to ~10 g/day) of dried Arthrospira,… | Generally well tolerated short-term; mild GI upset, headache, or allergic-type reactions ca… | 16 |
| Strawberry | Moderate | A typical serving is about 1 cup (152 g, ~8 medium berries) fresh. Card… | Generally very safe. | 10 |
| Tart Cherry | Moderate | Common food serving is about 1 cup (155 g) of fresh pitted sour cherrie… | Generally safe as a food. | 10 |
| Acai Berry | Preliminary | Commonly eaten as 100 g (about half a 200 g pack) of unsweetened frozen… | Generally well tolerated as a food. | 7 |
| Fig | Preliminary | A typical serving is 2 medium fresh figs (about 100 g) or 3-4 dried fig… | Figs are high in natural sugars (especially dried), so portion-control matters for diabetes… | 10 |
| Honeydew Melon | Preliminary | 1 cup diced (~170 g); a typical wedge is one-eighth of a medium melon | Generally very safe. | 9 |
| Indian Jujube (Ber) | Preliminary | A typical serving is about 3 fresh fruits (~100 g), providing roughly 6… | Generally recognized as safe as a food. | 9 |
| Jackfruit | Preliminary | About 1 cup sliced (165 g) of raw ripe fruit; the clinical glycemic tri… | Generally recognized as safe as a food. | 9 |
| Lychee | Preliminary | About 9 fresh lychees (~100 g edible flesh); Oligonol trials used 100-2… | Generally safe as a food in normal amounts. | 11 |
| Nectarine | Preliminary | A typical serving is 1 medium nectarine (about 140-150 g), eaten fresh… | Nectarines are a stone fruit (Prunus/Rosaceae); people with birch-pollen or oral allergy sy… | 9 |
| Passion Fruit | Preliminary | Pulp of 2-3 fruits (~36-55 g edible) as a whole-food serving. Studied b… | Generally safe as a food. | 9 |
| Persimmon | Preliminary | 1 medium fresh fruit (~168 g); persimmon-extract supplement trials used… | Astringent/unripe persimmons are high in soluble tannins that can polymerize in stomach aci… | 10 |
| Pineapple | Preliminary | A typical serving is 1 cup of fresh chunks (~165 g), delivering most of… | Bromelain can cause oral tingling/irritation and mild GI upset (nausea, diarrhoea); IgE-med… | 10 |
| Pomelo | Preliminary | 1 cup sections (~190 g); a whole medium fruit yields several cups of ed… | Like grapefruit, pomelo contains furanocoumarins that inhibit intestinal CYP3A4 and P-glyco… | 11 |
| Raspberry | Preliminary | A typical serving is 1 cup (~123 g) of fresh or frozen raspberries; cli… | Generally very safe as a food. | 11 |
| Starfruit (Carambola) | Preliminary | 1 medium fruit (~91 g) or ~100 g sliced; avoid entirely in chronic kidn… | CONTRAINDICATED in chronic kidney disease, end-stage renal disease, and dialysis patients—e… | 10 |
| Wax Apple | Preliminary | 1-2 fresh fruits (~85-170 g); eaten raw, skin-on | Generally recognized as safe as a food and well tolerated when eaten fresh. | 8 |
| Apple Cider Vinegar | Mixed for this goal | Commonly studied at 10-30 mL/day (about 1-2 tablespoons) of ~5% liquid… | Always dilute in water and avoid drinking it straight — undiluted vinegar (pH ~3) causes de… | 17 |
| Cinnamon | Mixed | 1–2 g/day of cinnamon powder or standardized extract in divided doses;… | Generally safe as a food/spice. | 19 |
| Guggul | Mixed | ~1,000–1,500 mg/day of standardized extract. | GI upset, headache and skin rash reported. | 14 |
| Peach | Mixed | 1-2 medium fresh peaches (about 150-300 g) as a serving; whole fruit is… | Generally very safe as a whole fruit. | 9 |
| Probiotics | Mixed | Strain-specific; commonly 1–10 billion CFU/day. Match strain to the stu… | Safe for most. | 19 |
| Yohimbe / Yohimbine | Mixed | Highly variable and often mislabeled in supplements; prescription yohim… | ⚠ Raises blood pressure and heart rate; linked to arrhythmia, heart attack, seizures and an… | 16 |
| Detox / 'Teatox' Cleanses | No Evidence | No legitimate use — the body's liver and kidneys handle detoxification. | ⚠ Hidden laxatives/diuretics can cause dehydration, low potassium, electrolyte imbalance, d… | 20 |
| Garcinia Cambogia (HCA) | No Evidence | Not recommended — benefits are negligible and liver-safety concerns exi… | ⚠ Liver injury (hepatotoxicity) has been reported with HCA-containing products, sometimes s… | 13 |
| Raspberry Ketones | No Evidence | No effective dose established in humans; weight-loss claims are unsuppo… | Limited human safety data. | 13 |