营销话术证据 B · meta 分析
16:8 间歇性断食加速代谢
真相
限时进食减重约等于同等热量的普通节食，不提高基础代谢；对孕妇和有进食障碍史的人反而有害。
这话术为什么会流行
限时进食靠畅销书和网红前后对比图走红；“加速代谢”比“不过是给热量限制加了个时钟”更有传播力。
机制速览
不吃东西时身体不会停机，只是换了个油箱：先用肝里存的糖，糖越用越少，就越来越多地拆身上的脂肪。各种断食方法说到底都在决定一件事——你每天有多长时间待在拆脂肪那一侧。常见的有五种：
来源（3）
- Liu, D., Huang, Y., Huang, C., Yang, S., Wei, X., Zhang, P., et al. (2022). Calorie restriction with or without time-restricted eating in weight loss. New England Journal of Medicine, 386(16), 1495-1504. 139 adults with obesity, 12 months, all on calorie restriction (1500-1800 kcal men, 1200-1500 kcal women), with or without eating only 08:00-16:00. Weight loss -8.0 vs -6.3 kg; net difference -1.8 kg (-4.0 to 0.4), P = 0.11, not significant; other outcomes consistent (abstract, PMID 35443107).
- Trepanowski, J. F., Kroeger, C. M., Barnosky, A., Klempel, M. C., Bhutani, S., Hoddy, K. K., et al. (2017). Effect of alternate-day fasting on weight loss, weight maintenance, and cardioprotection among metabolically healthy obese adults. JAMA Internal Medicine, 177(7), 930-938.
- Mejías-Peña, Y., Estébanez, B., Rodriguez-Miguelez, P., Fernandez-Gonzalo, R., Almar, M., de Paz, J. A., González-Gallego, J., & Cuevas, M. J. (2017). Impact of resistance training on the autophagy-inflammation-apoptosis crosstalk in elderly subjects. Aging, 9(2), 408-418.