营销话术证据 B · meta 分析
南非醉茄 = 睾酮助推器
真相
随机对照试验的汇总显示，睾酮只升了约 14-15%，仍在正常的生理波动范围内。
这话术为什么会流行
蹭“天然睾酮”和生物黑客的热度；几项小研究被补剂营销放大成一句笼统的承诺。
机制速览
南非醉茄（ashwagandha）是一种植物的根，印度传统医学用了约三千年，今天在货架上主打抗压和助眠。在压力大的成年人里，几项小型随机对照试验（RCT，随机分组、和安慰剂比）看到：连吃约两个月后，压力评分和清晨抽血测的皮质醇，都比吃安慰剂的人降得多。试验人数少、多在印度做，还需要更大的试验复制。
来源（1）
- Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of Ashwagandha root in reducing stress and anxiety in adults. Indian Journal of Psychological Medicine, 34(3), 255–262. 64 adults with chronic stress, single-centre, randomized double-blind: 300 mg high-concentration full-spectrum root extract twice daily or placebo for 60 days. Scores on all stress scales fell significantly more than on placebo (P < 0.0001); serum cortisol fell 27.9% from baseline vs 7.9% on placebo, a significant difference; adverse effects were mild and comparable in both groups (abstract, PMID 23439798; full text, PMC3573577).