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No legitimate or recommended dose — clenbuterol is not approved for human use in the US, is not a dietary supplement, and carries documented cardiac toxicity and a sport ban. We do NOT provide a fat-loss or 'cutting' dosing protocol. For context only, illicit bodybuilding use is reported in the microgram range (commonly cited as ~20–120 mcg/day, escalating), and athlete case reports span 20 mcg to 30 mg — wide, unvalidated, and associated with the toxicity in those very reports. That is not a recommended regimen.

Any time

None — not approved for human use in the US; veterinary/foreign asthma drug misused for fat loss; banned in sport

• Anyone with cardiovascular disease, arrhythmia, hypertension, or hyperthyroidism — clenbuterol causes tachycardia, arrhythmia, and myocardial injury
• Not an approved human medicine in the US and not a regulated dietary supplement — a veterinary/foreign asthma drug misused for fat loss; do not self-source
• Competitive or tested athletes — WADA-prohibited; will trigger an anti-doping violation

• Other stimulants / sympathomimetics (caffeine, ephedrine, amphetamines)
• Potassium-lowering drugs (diuretics, corticosteroids)
• Beta-blockers