\n\n
需要注意的是,目前国内保健品多为钙剂和维生素 D3 的复合制剂,在补充维生素 D3 的同时,每日钙的最大摄入量为 2500mg(包括饮食和额外的补充),要注意防止钙剂补充过量。
\n\n \n\n维生素 B6 是一种水溶性维生素,遇光或碱易破坏,不耐高温。它是一种常用的辅助药,顾名思义,就是能直接或间接帮助“主力药物”提高疗效、改善预后的一类药物。在帕金森病的治疗中,为改善多巴制剂的治疗效果,有时会添加维生素 B6 作为辅助药同服。
\n\n需要注意的是,小剂量维生素 B6(一日5毫克)与左旋多巴合用,可降低后者的疗效。为什么会这样呢?
\n\n左旋多巴制剂通过胃肠道吸收,进入全身血液,紧接着,存在于血液、其他器官的大部分药物(约 99%)和顺利进入大脑的药物(约 1%),都会转变为多巴胺。其中,脑内的新生多巴胺能帮助控制帕金森症状,而脑外的却可能带来不适。
\n\n维生素 B6 恰恰是这个反应的加速器之一,也就是说,如果在服用左旋多巴的同时也吃了少量维生素 B6(5mg,1 片),会导致左旋多巴在大脑外的分解加速,进入大脑的有效数量就下降了,身体不适的发生率也有所增加。
\n\n幸运的是,现在常用的左旋多巴制剂如“美多芭”(多巴丝肼片)、“息宁”(卡左双多巴控释片)、“达灵复”(恩他卡朋双多巴片),都属于复合药物。除了含有左旋多巴外,还含有能较强抑制左旋多巴在脑外分解的成分。在它们面前,维生素 B6 难有用武之地,只能在脑中继续发挥良性作用,增强左旋多巴药效。
\n\n另外,维生素 B6 必须按推荐剂量服用,不可超量服用,用药 3 周后应停药。若每天服用 200mg,持续 30 天以上,可能产生维生素 B6 依赖综合征。每日应用 2~6g,持续几个月,可引起严重神经感觉异常,进行性步态不稳至足麻木、手不灵活,停药后可缓解,但仍软弱无力。化解的关键在于,理解维生素 B6的性质、日需求量以及推荐剂量。
\n\n维生素 B6 主要靠食物获取,正常饮食即可满足生理需求,其日需求量,成年男性约 2.0mg/天,成年女性约 1.6mg/天。
\n\n由于维生素 B6 是水溶性维生素,人体不吸收部分可以通过肾脏排出,因此,维生素 B6 在肾功能正常时几乎不产生毒性。
\n\n市售的维生素 B6 剂量一般为 10mg/片(可能有少量厂家生产其余剂量,需注意鉴别),每日随多巴制剂量服药 4 次者,日摄入量为 40mg,远未达到说明书的警戒剂量、不良反应案例报道中的使用剂量。
\n\n药品说明书及部分文献中限制维生素B6用药周数的相关内容,是对可能存在的超剂量使用给予限制,以及对可能存在的副反应给予提示,暂不适用于与左旋多巴制剂合用治疗帕金森病的情况,因此可以长期随药服用。
\n\n \n\n有研究证明,帕金森病患者体内的维生素 C 和维生素 E 水平较正常人低一些。而每天补充这两种维生素,对帕金森病患者的康复有益。
\n\n一般来讲,帕金森病患者每天的维生素 C 补充量在 3000毫克左右,而维生素 E 的补充量在 1000微克左右为宜。
\n\n建议先从饮食中合理补充,多吃些新鲜的水果和蔬菜。另外,还可通过维生素补充剂来摄入。
\n\nNADH 是人体从食物获得能量的必需物质,每个细胞中所含有的 NADH 越多,细胞产生的能量也越多。它还是一种很有效的抗氧化物质,保护人体避免污染的有害影响。免疫防御系统也需要它,它还能刺激激素的分泌,以改善人的情绪、机敏性和性欲,甚至还能降低胆固醇和血压。
\n\n另外,NADH 还刺激大脑细胞生成多巴胺和肾上腺素。而多巴胺的缺失正是帕金森病的发病机制之一。对于帕金森病患者来说,补充一定量的 NADH 常有益于健康和康复的。
\n\n需要注意的是,在选购 NADH 类膳食补充剂时,要选择有品牌保障的产品。
\n\n总的来说,各种营养成分、维生素,对帕金森患者的病情是有一定帮助的,但是用法和用量上却有很多讲究,用得不好还会适得其反,所以,保健品、营养补充剂并不能自己随便吃,而要和医生咨询,结合他们的成分和自己服用的药物,来选择最合理的吃法。
\n\n \n\n本文来自复旦大学附属华山医院帕金森团队“帕为患者”APP,更多帕金森健康管理内容可前往阅读。
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