HUMAN NUTRITION

Detailed explanation-1: -Vitamin D deficiency can lead to a loss of bone density, which can contribute to osteoporosis and fractures (broken bones). Severe vitamin D deficiency can also lead to other diseases: In children, it can cause rickets. Rickets is a rare disease that causes the bones to become soft and bend.

Detailed explanation-2: -Without enough vitamin D or calcium, your parathyroid glands compensate by producing too much of their hormone, a condition called hyperparathyroidism. That can lead to bone weakening (osteoporosis) and increased fracture risk.

Detailed explanation-3: -Key facts. Osteoporosis is a long-term (chronic) disease which makes your bones more likely to break from minor injuries or falls.

Detailed explanation-4: -Rickets is a disease that causes thin, weak and deformed bones. In adults, not having enough vitamin D and calcium causes osteoporosis (loss of bone density) and can lead to fractures (broken bones).