Vitamin D does much more than support bone health—it helps regulate energy metabolism, reduces stress, and protects against cell damage.
Low vitamin D levels make it harder for cells to handle oxidative stress, a process that damages tissues and contributes to aging and disease. Without enough vitamin D, mitochondria (the body’s energy producers) don’t work properly, and harmful molecules called free radicals build up and cause oxidative stress.
This imbalance can affect nearly every part of the body.
Low vitamin D has been linked to brain problems such as memory loss and Parkinson’s, heart disease, diabetes, liver problems, weak bones, and immune issues.
Vitamin D helps keep inflammation under control, supports energy production, and protects cells from breakdown.

Getting enough sunlight, eating vitamin D–rich foods (like fatty fish or fortified foods), and taking supplements if needed can restore balance and lower the effects of oxidative stress.
This helps maintain healthy aging and reduces the risk of chronic disease.
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