Normal muscle contraction
Muscle strength
Balance
Physical performance
Neuromuscular function
Without enough vitamin D, muscles may not function as efficiently, even when dietary protein intake is adequate.
Why Muscle Strength Changes with Age
Beginning around age 50, adults gradually lose muscle mass in a process known as sarcopenia.
Several factors contribute, including:
Reduced physical activity
Lower protein intake
Hormonal changes
Chronic illness
Vitamin D deficiency
Although muscle loss cannot be completely prevented, healthy lifestyle habits—including adequate vitamin D—may help slow its progression.
1. Supports Normal Muscle Function
Vitamin D plays a role in helping muscles contract efficiently.
