often develop slowly.
There is rarely a dramatic warning sign.
Instead, people may notice small everyday clues.
Some common experiences reported by adults include
• Persistent muscle fatigue
• Stiff hips or legs when standing up
• Feeling weaker when climbing stairs
• Low energy during the day
Of course, these symptoms can have many causes. Aging, activity level, sleep quality, and hydration also play a role.
But here is what makes vitamin D interesting.
Because it supports both bones and muscles, even mild deficiency may affect how comfortably you move.
And here is
