Supplements zinc which may help maintain healthy immune function and blood sugar balance.

补充锌可能有助于保持健康的免疫功能和血糖平衡。

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Our immune system's function is to keep us healthy in the face of an environment where there are lots of things that could potentially harm us.

我们免疫系统的功能就是保持自身健康,在面对危机四伏的环境时,使我们免受伤害

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Vitamin D also appears to play a role in healthy immune function and reducing inflammation, a risk factor for numerous diseases including cancer, heart disease and diabetes.

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Beta carotene is a type of carotenoid, a plant pigment that is a provitamin for vitamin A. During its digestion and metabolism, a percentage is converted to vitamin A, a fat-soluble vitamin that is important for vision, growth and development, and healthy immune and reproductive function.

CNN: Should I take beta carotene as a supplement?