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Longevity

廉价复合维生素略升 DHA ——但未改变衰老时钟

Dr. Synapse · · 1 min read

廉价复合维生素略升 DHA ——但未改变衰老时钟

每日服用的复合维生素是美国最常见的膳食补充剂之一,但我们对其在分子层面的作用仍知之甚少。COSMOS 随机对照试验的最新分析评估了连续两年服用 Centrum Silver 对老年人血液代谢组的影响,发现了一些有趣的变化,同时也提醒我们标题常常忽略的关键警示。

该研究由 Li 等人 主导,已发表在 GeroScience(DOI: 10.1007/s11357-026-02197-9;PubMed)。

试验设计:测试了什么

COSMOS(COcoa Supplement and Multivitamin Outcomes Study)是一项 2 × 2 因子设计、安慰剂对照、双盲 的随机试验,针对美国老年人开展。本文聚焦于复合维生素‑矿物质(MVM)组,比较 Centrum Silver® 与安慰剂的差异。

  • 代谢组学子样本:399 名受试者(平均年龄 70.3 ± 5.7 岁;女性占 50.1%)
  • 采血时间点:基线、1 年和 2 年,使用 Nightingale Health NMR 平台检测
  • 主要分析项目:
    • 168 项单一代谢物
    • 7 条代谢年龄时钟(衡量生物学年龄)
    • 24 项代谢风险评分(MRS),对应慢性疾病

发生变化的代谢物

与安慰剂相比,连续两年每日服用 MVM 可观察到以下变化(均为 Cohen d 效应量):

  • DHA(二十二碳六烯酸) ↑,Cohen d = 0.212(95% 置信区间:0.02–0.404)
  • 总 omega‑3 脂肪酸 ↑,Cohen d = 0.193(0.003–0.382)
  • 血清肌酐上升幅度 ↓,Cohen d = -0.222(-0.424–-0.019)

这些效应均属小幅度,置信区间几乎贴近零。肌酐常被用作肾功能指标,研究仅指出 MVM 组的常规上升趋势被削弱,未对临床意义作进一步解释。

疾病风险评分

MVM 还使 16 种慢性疾病 的代谢风险评分出现下降,Cohen d 范围在 -0.206 至 -0.277 之间。摘要列出的疾病包括:

  • 重大心血管事件
  • 肾脏疾病
  • 全因痴呆
  • 哮喘
  • 白内障
  • 青光眼
  • 肝病
  • 非黑色素瘤皮肤癌
  • 前列腺癌

这些评分基于代谢物模式的统计估计,并非临床诊断或真实的疾病结局。因此,评分下降并不等同于试验中有人实际避免了这些疾病的发生。

衰老时钟:轻微下降而非逆转

最诱人的标题往往是“复合维生素让生物年龄倒回”。事实并非如此。MVM 在全部七条代谢年龄时钟上均呈 非显著 的下降,幅度介于 0.496 至 1.054 年。方向虽统一,但统计检验未达显著水平。

不能忽视的关键点

  • 所有效应仅在 名义显著(p < 0.05)层面达标,**未通过多重检验校正**(FDR > 0.05)。当同时检验 168 种代谢物、7 条时钟和 24 项风险评分时,偶然出现 “显著” 结果是必然的。作者将这些发现描述为 初步证据,称每日 MVM “可能轻度改善老年人的代谢特征”,并强调样本量仍有限。
  • 摘要未说明这些代谢变化是否转化为真实的健康改善。作者指出,需要在 COSMOS 项目内部进一步研究,以确认这些改变是否真的有助于健康老龄化。

实际意义

  • 剂量:本试验使用的是每日一片、专为老年人设计的 Centrum Silver 复合维生素‑矿物质。摘要未披露完整配方或单片含量,若想了解细节请查阅产品标签或完整论文。
  • 服用时机:摘要未提及最佳服用时间或是否需随餐。唯一可参考的是,效应是在连续 1‑2 年每天服用 的前提下观察到的。
  • 适用人群:受试者为美国老年人,平均约 70 岁。结论最直接适用于同龄人群,不能直接外推至年轻人或营养状态不同的群体。
  • 需谨慎或避免的情形:
    • 寻求已证实的抗衰老效果的人群——年龄时钟的变化并不显著。
    • 期待明确疾病预防的人群——本研究只测量了血液风险评分,未追踪真实的疾病发病率。
    • 有肾功能问题、正在服用处方药或其他补剂的人——虽然本研究未针对这些人群进行分析,但实际使用前仍建议咨询医生,尤其是研究中出现了肌酐相关的变化。
  • 核心结论:两年服用常规复合维生素与 DHA、omega‑3、肌酐趋势以及疾病风险评分的轻微、方向性有利变化相关。这些信号更像是产生假设的线索,而非确凿证据。仅凭此结果,复合维生素仍不能被视作经验证的长寿利器,仍需更大规模的后续研究来检验这些信号是否稳固。

来源:Li 等人,GeroScience,COSMOS 随机临床试验两年结果。试验注册号:NCT02422745。

Original study

Read the original research on pubmed.ncbi.nlm.nih.gov →

This article summarizes published research for general information. It is not medical advice.

DS

Written by

Dr. Synapse

Dr. Synapse writes for Biocracked: biohacking science, longevity & human performance.

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