Goal guide
Best compounds
for fat loss
Ranked by evidence quality and realistic effect size. No magic pills — but some compounds meaningfully change the equation.
Honest baseline
No compound replaces a caloric deficit. Every compound on this list works better when combined with proper nutrition and training. That said, some of these meaningfully change body composition outcomes — especially for people who have hit a plateau or are dealing with metabolic issues.
Semaglutide
IntermediatePrescription requiredOzempic, Wegovy, GLP-1 agonist
The most powerful fat loss compound available. FDA approved. 15-20% body weight reduction in trials. Requires prescription but the evidence is unmatched.
Best for: Significant fat loss, appetite control
Creatine Monohydrate
BeginnerCreatine, Cr
Counterintuitive but true — creatine preserves lean muscle during a cut, which keeps your metabolism higher and makes the fat you lose actually fat, not muscle.
Best for: Preserving muscle during caloric deficit
Berberine
BeginnerBerberine HCl, Nature's Ozempic
Activates the same pathway as metformin. Improves insulin sensitivity, reduces fat storage, and has real evidence for modest fat loss at therapeutic doses.
Best for: Metabolic health, insulin resistance, modest fat loss
RAD-140
IntermediateTestolone
Preserves and builds muscle in a caloric deficit, allowing you to cut harder without losing lean mass. Not a direct fat burner but dramatically improves body composition during a cut.
Best for: Body recomposition, muscle preservation while cutting
AOD-9604
IntermediateAnti-Obesity Drug 9604, HGH Fragment
HGH fragment specifically targeting fat cells without raising blood sugar. Modest effect size in humans but one of the cleaner fat-targeted peptides available.
Best for: Targeted fat loss, no glucose impact
L-Citrulline
BeginnerCitrulline Malate
Improves training performance and endurance during a caloric deficit when energy is low. More reps, better cardio sessions, more calories burned.
Best for: Training performance while cutting
The beginner fat loss stack
Start here before anything else. Creatine, berberine, and citrulline are all legal, inexpensive, and have real evidence behind them. Get these dialed in before considering SARMs or peptides.
Legal stack:
Creatine: 5g/day any time
Berberine: 500mg 3x/day with meals
L-Citrulline: 6-8g 30min pre-workout
100% legal · No PCT · No bloodwork required
What about Cardarine?
Cardarine (GW-501516) is frequently mentioned in fat loss discussions because it dramatically increases endurance and fat oxidation. We deliberately left it off this ranked list. GlaxoSmithKline abandoned it in Phase 2 trials after it caused rapid tumor growth in animal studies. The human safety data is essentially zero. The endurance benefits are real, but the risk profile is genuinely concerning in a way that separates it from every other compound on this page. Read the full breakdown before considering it.