YSK that 41% of the population have a vitamin D deficiency, which could be linked to chronic diseases, fatigue, weak immune system
from /r/YouShouldKnow
YSK，41%的人有维生素D缺乏，这可能与慢性疾病，疲劳，免疫系统弱有关。
YSK，41%的人有维生素D缺乏，这可能与慢性疾病，疲劳，免疫系统弱有关。
YSK that 41% of the population have a vitamin D deficiency, which could be linked to chronic diseases, fatigue, weak immune system
from /r/YouShouldKnow