蛋白质:生命的基石

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把蛋白质想象成生命的基石。它是继氧气和水之后,人体最重要的营养素。你身体里的每个细胞都在不断更新,如果没有足够的蛋白质,身体就缺乏重建这些细胞的原材料。

如果蛋白质不足,你的身体会分解肌肉来补偿。随着年龄增长,这种肌肉流失会变得更明显——这在许多亚洲文化中是常见问题,因为传统饮食往往高碳水、低蛋白。经过几十年蛋白质摄入不足,肌肉质量下降,导致老年人变得虚弱。这解释了为什么许多老年人在走路或站起来这样的基本活动中都很吃力。同样,这对处于生长阶段的人也是如此。

你需要多少蛋白质?

推荐的蛋白质摄入量因肌肉质量、身高、年龄、性别和活动水平等因素而异。但简单的指导原则是:

每公斤体重1克蛋白质用于基本维持

如果你训练增肌,每公斤体重1.2-1.4克蛋白质

例如,一位50公斤的女性每天需要约50克蛋白质来维持基本需求,而一位75公斤的男性需要约75克。如果你比较活跃,目标可以更高。

蛋白质和肌肉质量:简单等式

以下是蛋白质摄入如何影响你的身体:

缺乏蛋白质 = 肌肉质量流失

足够蛋白质 + 睡眠 = 维持肌肉质量

足够蛋白质 + 运动 = 增加肌肉质量

运动不一定意味着重型健身房锻炼。简单的活动如站立、走路和四处活动都有助于维持肌肉——只要你不是懒散度日。抗阻训练能加速肌肉发展,但即使是轻微运动配合足够的蛋白质摄入也能带来巨大差异。

如果你摄入过多或过少蛋白质会怎样?

除非你有预先存在的肾脏问题,否则过量的蛋白质不会伤害你的身体。你的肾脏会更努力地通过尿液排出多余部分。你还需要更多纤维——可溶性和不可溶性的——来帮助消化。但对于健康人来说,几乎没有风险。

我每天都看到这种情况,尤其是在马来西亚。无论是因为不喜欢某些肉类,某种饮食计划,还是为了省钱,缺乏细胞再生的基本构建模块,简单来说,就意味着你会开始慢慢失去肌肉(取决于你饮食的营养不良程度)。这种影响在几十年不良饮食习惯后会大大加剧。

增重与减脂的蛋白质摄入

从个人经验来看:

增重:饭后喝蛋白质奶昔。这会增加你的卡路里摄入,而不会让你感觉太饱。

减脂:饭前喝蛋白质奶昔。它会让你感觉更饱,减少碳水和油脂的摄入。你也会发现自己不太想吃零食。

关于身体目标,追踪肌肉质量或腰围比追踪体重更有意义。肌肉比減肥更密集更重,所以体重秤可能无法准确反映你的进步。水分重量也会根据水分摄入、盐分摄入和荷尔蒙变化每天波动。这种临时的体重增减与減肥或肌肉关系不大,使其成为不可靠的进步指标。

常见食物中的蛋白质含量

达到每日蛋白质目标可能出人意料地具有挑战性。以下是常见食物中的蛋白质含量,给你一个大致概念:

食物每100克蛋白质
鸡胸肉30克
豆腐8克
鸡蛋(1个)6克
金枪鱼(罐头)25克
全麦面包9克
牛奶(200毫升)6克

现在,考虑一下典型的马来西亚饮食:受欢迎的菜肴如椰浆饭、炒粿条、虾面和炒面。这些饭菜钠含量高,碳水化合物和油脂多,但蛋白质极低。

例如,个体A早餐吃印度煎饼配豆酱(~8克),午餐吃鸡饭(~27克),晚餐吃炒面(~15克)。他达到了约50克的蛋白质摄入。

而个体B早餐只喝咖啡,午餐吃炒粿条加1个鸡蛋(~8克),晚餐吃炒饭(~10克)。他那天只达到了约18克的蛋白质摄入。

最后,个体C早餐吃2个半熟鸡蛋配吐司(~14克),午餐吃金枪鱼三明治(~15克),晚餐吃鸡排(~35克)。他那天达到了约64克蛋白质。

如果你体重50公斤,不管你的体重目标如何,你都应该每天摄入50克蛋白质。你肌肉流失的速度,真的取决于你蛋白质缺乏的程度(当然还有其他因素如睡眠/水分摄入,但我们只关注这次讨论的蛋白质摄入)。

蛋白粉:便捷解决方案

蛋白粉简化了这个过程。一杯饮料可提供高达50克蛋白质。但有这么多种类可用,哪种最适合你?以下是各类型的平均蛋白质含量及其优缺点:

类型每100克蛋白质优点缺点
乳清75-80克最完整的氨基酸谱;快速吸收昂贵;可能导致胀气、痤疮,乳糖不耐受者可能有问题
大豆75-85克最便宜选择;植物基吸收较低;过量摄入可能有类雌激素效应
豌豆75-85克富含铁;为活跃人群补充钠略带苦味;钠含量较高,可能影响高血压患者
奶粉16-24克口味好;额外钙质全脂版卡路里更高;可能导致痤疮

虽然大豆蛋白经济实惠且植物基,但值得注意的是,许多人已经每天食用大豆产品——如豆浆、豆饼和豆腐。过量摄入可能导致类似雌激素的效果,特别是如果你的日常蛋白质摄入严重依赖于大豆类食品和补充剂。平衡是避免激素失衡同时仍然享受大豆益处的关键。

我个人的蛋白质混合

自从我之前关于乳清蛋白粉的文章以来,你们很多人问我吃什么。个人而言,我喜欢混合乳清、大豆和豌豆蛋白——平衡每种的优点同时降低成本。我用脱脂或全脂牛奶混合,取决于我当天的目标。通常,我会用1勺奶粉,1勺大豆和0.5勺乳清。我打算也把豌豆蛋白加入我的混合物中(等待促销)。我发现这个品牌的产品是成本与质量比最好的之一。

Hazim Khalim Whey Protein Concentrate
Hazim Khalim 乳清蛋白浓缩物
Hazim Khalim Soy Protein Isolate
Hazim Khalim 大豆蛋白分离物
Hazim Khalim Skim Milk Powder
Hazim Khalim 脱脂奶粉
Farm Fresh Full Cream Milk Powder
Farm Fresh 全脂奶粉

至于口味,我添加Extra Joss、雀巢咖啡、巧克力粉或顺滑花生酱(Ladies Choice),取决于我的心情和计划活动。

为什么混合不同蛋白质?

结合蛋白质给你所有世界的最佳——更完整的氨基酸谱,更好的口味,和成本效益。你可以根据你的偏好和饮食需求调整比例。

采用正确方法,达到你每日蛋白质目标变得更容易——无论你的目标是增肌、减脂,还是只是长期维持健康。市场上也有预混合蛋白质选择。但是,这些混合物中每种蛋白质的确切百分比通常不公开。一些制造商可能只添加少量昂贵的乳清,同时增加更便宜的大豆或豌豆蛋白比例。作为消费者,对此保持警惕并选择提供混合成分透明度的品牌至关重要。

结论

最终,确保足够的蛋白质摄入不仅仅是为了今天建立肌肉——是为你未来健康投资。短期内你可能不会注意到显著变化,但随着时间推移,你的身体会感谢你。随着年龄增长保持肌肉质量意味着保持活动能力、力量和整体健康。

记住,虽然蛋白粉提供了一种方便的方式来达到你的每日目标,但它们并不是为了替代全食物。全食物提供粉末所缺乏的基本宏量营养素、维生素和矿物质。然而,如果你时间紧张或难以准备饭菜,蛋白粉可以成为有用的补充来填补空缺。把它们视为工具——而不是替代品——用于平衡的、富含蛋白质的饮食。

请与你的家人和朋友分享这篇文章。特别是那些你认为对身体营养需求特别无知的人。

免责声明:上面列出的产品链接是联盟性质的,意味着每次购买都会帮助支持这个网站,对你没有额外费用。

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