Vitamin D Deficiency

Your body makes vitamin D when skin is exposed to sunlight, but production often drops with the shorter days of winter, creating a vitamin D deficiency. Watch your vitamin D intake for bone health and other benefits. — Sanford Health

How to Combat Vitamin D Deficiency During Short Winter Days – Sanford Health
Feeling Less Energized During the Winter Months? Go Take a Hike & Get Some Vitamin D – National Alliance on Mental Illness
Vitamin D: A Detailed Look – National Institute of Health: Office of Dietary Supplements
Vitamin D Myths ‘D’-bunked – Yale Medicine
Vitamin D and Your Health: Breaking Old Rules, Raising New Hopes – Harvard Medicine
How to Get More Vitamin D from Your Food – Cleveland Clinic