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Nutrition

这款零卡路里稀有糖在补水方面胜过运动饮料

Dr. Gymbro · · 1 min read

这款零卡路里稀有糖在补水方面胜过运动饮料

很多人使用的运动饮料并未发挥最佳的补水效果,而答案可能是一种几乎不被身体燃烧的糖。最新的随机、双盲、交叉试验发现,以阿洛酮糖(Allulose)为甜味剂的等渗电解质饮料——一种热量极低的稀有糖——在血浆容积恢复方面明显优于使用蔗糖代糖的对照饮料。结果虽令人惊喜,但研究样本小、周期短且由行业资助。下面我们一起看看它到底说明了什么,以及有哪些局限。

什么是阿洛酮糖,为什么要拿它来测试补水效果?

碳水化合物饮料是运动后补水的常规选择。糖分可以促进肠道对水和钠的吸收,但随之而来的热量和血糖波动对许多运动员和健身爱好者并不友好。零卡路里甜味剂虽然能解决热量问题,却并不能帮助液体的摄取。

阿洛酮糖恰好介于两者之间。它是一种热量极低的稀有糖,被视为有潜力的替代甜味剂。迄今为止,关于它是否真能提升补水效果的人体证据仍然稀缺。本次试验发表在 Food Science and Biotechnology(doi: 10.1007/s10068-026-02329‑z),旨在填补这一空白。

研究设计

  • 设计:随机、双盲、交叉试验
  • 受试者:15 名健康男性
  • 流程:受试者先进行运动诱导的脱水,然后分别饮用两种等渗电解质饮料——一种以阿洛酮糖甜味,另一种以蔗糖代糖甜味(对照组)
  • 测量指标:血浆容积(PV)恢复、液体滞留率、主观口渴感、体内水分分布、尿比重、血糖以及体温

交叉设计让每位受试者既是实验组又是对照组,能够在小样本情况下提升统计效能。双盲则确保受试者和研究人员在试验期间都不知道所饮饮料的种类。

脱颖而出的数据

  • 血浆容积恢复:阿洛酮糖组为 28.16 ± 11.61%,蔗糖代糖组为 4.13 ± 5.34%(p = 0.0001),相差约七倍。
  • 液体滞留率:阿洛酮糖饮料为 91.54 ± 5.18%,蔗糖代糖饮料为 80.55 ± 10.24%(p = 0.0023),说明更少的液体在饮用后直接进入厕所。
  • 口渴感下降:口渴评分分别为 6.47 ± 1.46(阿洛酮糖) 与 4.60 ± 1.12(蔗糖代糖)(p = 0.0012),阿洛酮糖组的受试者感到口渴更快消退。
  • 安全性:整个实验期间血糖和体温均未出现异常,说明该甜味剂在补水时不会带来血糖或体温的额外负担。

需要注意的细节

  • 对照并非传统含糖饮料:本研究的对照是一款零卡路里的甜味饮料,而不是常规的含糖运动饮料。因此结论只能说明阿洛酮糖优于另一种低卡饮料,不能直接推断其胜过普通含糖饮料。
  • 样本规模与人群局限:仅有 15 名健康男性,未涉及女性、老年人、长时间耐力运动员或代谢疾病患者,外推性受限。
  • 行业资助:研究经费和试剂均来自阿洛酮糖生产商 Samyang Corporation,且多位作者为该公司员工。虽然不一定导致数据造假,但构成了明显的利益冲突,独立重复尤为重要。
  • 单一脱水模型:实验在受控实验室环境下进行,实际场景如马拉松、连续多日高温训练或长时间体力劳动的效果仍未知。该论文尚未被 PubMed 收录,获取全文主要依赖 DOI。

对你意味着什么

可能受益的群体

  • 大量出汗者:需要快速恢复血浆容积但又不想摄入过多糖分的人。
  • 避糖的运动爱好者:关注热量、血糖或整体糖摄入量的群体。
  • 已有低卡电解质饮料使用经验者:本研究提示甜味剂的选择可能真的会影响补水效果,而不仅是口感。

仍需观望或慎用的人群

  • 需要能量补给的运动员:高强度训练时,零卡路里饮料无法提供碳水化合物的能量支持。本研究只评估补水,而非运动表现。
  • 期待完全取代传统运动饮料的人:目前缺乏直接比较常规含糖运动饮料的实验数据。
  • 胃肠敏感或有特殊疾病的人:研究未覆盖这些人群,对新甜味剂的耐受性可能因人而异。糖尿病或消化系统疾病患者应先咨询医生。

剂量与使用时机

受试者是在运动后脱水状态下饮用的饮料,所以结论仅适用于运动后补水。原文未明确给出阿洛酮糖的具体剂量、饮用量或摄入间隔,若要照搬实验方案需查阅原文细节并避免自行增加剂量。市面上销售的阿洛酮糖饮料在糖分和电解质配比上可能与本研究使用的配方不同,请以产品标签为准。

结论

这是一项有前景的早期信号:在 15 名男性中,阿洛酮糖甜味的等渗电解质饮料在血浆容积恢复、液体滞留率以及口渴感减轻方面均优于蔗糖代糖对照饮料,且未出现血糖或体温异常。然而,研究样本小、行业资助且对照为非糖饮料,结果更应视为激励进一步独立、大样本、并与传统含糖运动饮料直接比较的探索,而非立即调整补水策略的决定性依据。

Original study

Read the original research on doi.org →

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

DG

Written by

Dr. Gymbro

Dr. Gymbro writes for Dr. Gymbro: science-backed fitness, nutrition & performance.

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