Ma Huang
Ma huang (Ephedra) contains stimulant alkaloids that can modestly boost metabolism and suppress appetite, but safety concerns and regulatory bans mean it is not recommended as a weight-loss supplement.
Safe Diet Pills
Herbal and stimulant-based diet pills can cause modest short-term effects but carry real risks. Ephedra was banned in the U.S. in 2004; modern products often use other stimulants. Read labels, limit total caffeine, and consult a clinician before use.