Vitamin D levels are falling, time for a supplement? Possibly. Especially if you live north of the 33rd parallel (Atlanta (GA), Birmingham (AL), Pheonix (AZ) or Long Beach (CA)) in the US, the sun can’t make vitamin D in your skin between September-March. So, ask your doctor to check your levels and if you are low, begin a dietary supplement of at least 1,000 IU daily. Once spring hits, you can let the sunlight make vitamin D for you IF you get outside for about 15-20 minutes each day WITHOUT sunscreen (if you have darker skin you’ll require more time). Your immune system (and many other body systems) will thank you.
