Vitamin D gets converted in the body to a steroid hormone: 1,25 dihydroxyvitamin D.
Well then it makes sense that vitamin D would have some effect on strength. This active form of vitamin D binds to something scientific like “nuclei of muscle cells” etc. but when it binds to these receptors, it enhances muscle contraction and protein synthesis thus leading to muscle growth and strength.
After taking 1,000 international units of vitamin D twice per day before eating, it`s safe to say that you are ready for gaining greater muscle size and strength.