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紫檀芪 - 具有高生物利用度的有益补充剂

紫檀芪是一种天然化合物,存在于蓝莓、葡萄以及由这些水果制成的加工食品和饮料(即葡萄酒或葡萄汁)中。各种临床、随机、双盲研究表明,补充紫檀芪的摄入可能会带来多种健康益处。其分子结构与白藜芦醇相似,均属于植物抗毒素(植物产生的抵御寄生虫和昆虫的化合物)类别。有人可能会认为紫檀芪是两者中更好的补充剂,因为它更有效且生物利用度更高:

 

吸收

相比之下,与白藜芦醇相比,紫檀芪具有更高的疏水性和口服吸收率。与估计值相比 口服生物利用度为白藜芦醇的 20% ,紫檀芪在 56 至 168mg/kg 剂量下口服生物利用度接近 80%。紫檀芪的清除率表明它能有效地在体内生物累积,其双甲氧基使其比补充的白藜芦醇更容易扩散到细胞中。

 

紫檀芪的健康益处

 

降低血压

这项研究表明,紫檀芪可以降低高胆固醇(高胆固醇血症)成人的血压。虽然紫檀芪对胆固醇有一些不利影响,但葡萄籽提取物可以减轻这些影响。这些发现支持了这样的理论:葡萄籽提取物和紫檀芪应该一起补充(就像吃葡萄一样)

 

减少神经炎症(神经系统炎症)

在本研究中,10-30 μM 的紫檀芪被证明可以降低小胶质细胞一氧化氮的产生,而无需直接从一氧化氮自由基中清除。它通过抑制 IκBα 磷酸化来实现这一点。这些影响被证明略微 比白藜芦醇更有效。

 

血糖与糖尿病

多项研究表明紫檀芪可以改善血糖水平:

 

- 通过在患有高胆固醇血症的仓鼠的饮食中添加 25 微克/千克的紫檀芪,血糖水平下降了 14%。

 

- 对于糖尿病大鼠,持续六周的 40mg/kg剂量不仅可降低血糖水平,而且还可同时增加胰岛素。

 

- 在较小程度上,这些好处甚至延伸到健康大鼠,使血糖降低了 6.3%。

 

- 对于高血糖大鼠, 40mg/kg 紫檀芪补充剂的效果可与 500mg/kg 二甲双胍摄入量相媲美。

 

认知功能

研究表明,在 12-13 周的时间内补充紫檀芪可以改善老年大鼠的认知能力。研究表明,认知能力的提高与海马体中的紫檀芪浓度有关,

 

补充紫檀芪安全吗?

一项研究 每天给小鼠服用 3000mg/kg 剂量的紫檀芪。(这是人类估计摄入量的 500 倍。)这些剂量没有产生显著的临床毒性。

 

但人类又如何呢?
在一项人体临床试验中,受试者在 6-8 周内每天两次服用 250 毫克紫檀芪补充剂,每次 125 毫克。他们没有表现出临床或生化毒性迹象。

 

为什么要与葡萄籽提取物结合?

如上所述,在某些情况下,单独服用紫檀芪会导致低密度脂蛋白轻微升高。当葡萄籽提取物与紫檀芪一起补充时,这种副作用就被消除了。从根本上讲,在自然界中,葡萄籽和紫檀芪同时存在于同一块水果中,并且人类已经一起食用了数千年。

除了两者结合带来的好处外,葡萄籽提取物本身还具有多种健康益处,例如:

 

减少氧化损伤

抑制自身免疫性关节炎的骨质破坏

支持大脑健康

可以保护你的肝脏

促进伤口愈合

改善血液流动,降低血栓风险

 

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