I live in Michigan, and I have always struggled through the winters.
I recently learned that in the winter, in the North, the angle of the sun is such that UVB rays cannot penetrate the atmosphere and your body therefore cannot produce Vitamin D. Surprisingly few people who live here are aware of this.
I take Vitamin D supplements every winter now and I think it makes a difference.
I recently learned that in the winter, in the North, the angle of the sun is such that UVB rays cannot penetrate the atmosphere and your body therefore cannot produce Vitamin D. Surprisingly few people who live here are aware of this.
I take Vitamin D supplements every winter now and I think it makes a difference.
https://pubmed.ncbi.nlm.nih.gov/2839537/