ChatGPT SearchSep 28, 2026
If your main goals are more workout energy + help with fat loss, I’d focus on a caffeine-based pre-workout rather than a traditional “fat burner.” The evidence for weight-loss supplements overall is limited, while caffeine has much better evidence for reducing fatigue and improving exercise performance.
What I’d look for
- Caffeine: roughly 2–3 mg/kg (about 1–1.4 mg/lb) 30–60 minutes before training is a reasonable starting point. Research commonly uses 2–6 mg/kg, but higher doses increase side effects without necessarily providing more benefit.
- Creatine monohydrate: 3–5 g daily. It isn't a fat burner, but it has strong evidence for improving strength, power, and high-intensity training capacity.
- Avoid proprietary “fat-burning blends” with lots of stimulants or undisclosed caffeine amounts. Combining stimulants can increase adverse effects.
- Green tea extract: I wouldn't make it a priority; any weight-loss effect appears small, and concentrated extracts have been associated with liver problems in some people.
For a healthy adult, the FDA considers up to 400 mg caffeine/day generally safe, although individual tolerance varies and caffeine can interfere with sleep.
If you tell me your weight, whether you lift/cardio/both, what time you work out, and how much caffeine you normally drink, I can narrow this down to a specific supplement/dose and look at currently available products.
