维生素D有助于强健骨骼和肌肉，维生素D摄入不足可能引起软骨病和骨质疏松症等疾病。 
Hints:
rickets
osteoporosis
mackerel
Boston University
 
Vitamin D helps bones and muscles grow strong and healthy. Low levels of vitamin D can lead to problems like rickets and osteoporosis. Rickets is a deformity mainly found in children. Osteoporosis is the thinning of bone, a common problem as people, especially women, get older. Studies in recent …
维生素D有助于强健骨骼和肌肉，维生素D摄入不足可能引起诸如软骨病和骨质疏松症等疾病。软骨病是一种身体畸形的疾病，儿童为易患人群。骨质疏松症的表现是骨质减少，是人们衰老过程中的常见疾病，妇女尤其易患。 近些年的研究表明维生素D可能存在其他用途。研究显示，缺乏维生素D可能会增加人们死于某些癌症和男性患心脏…