Your cardiovascular system is an important and fragile group of structures that pumps nutrient - and oxygen-rich blood throughout your body.

你的心血管系统是一组重要而脆弱的结构，它输送你身体富含营养和氧气的血液。

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Those are also symptoms of a deficiency of B-12, a key nutrient needed to make red blood cells and DNA and keep the nervous system working right.

这也是维生素b - 12缺乏的症状，B - 12是合成红细胞和DNA、维持神经系统正常运转的不可或缺的营养物质。

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There are some nutrient sources - such as selenomethionine, a widely used form of selenium, boron for bone health and chromium yeast for regulating blood sugar - that aren't on the list.

有很多营养成分未被列入‘合格清单’，比如硒代蛋氨酸、有益于骨骼的硼和调节血糖的有机铬。

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