Irisin hormone was not affected by non-pharacological doses of vitamin D
Pilot study: Vitamin D’s effect on newly discovered hormone Vitamin D Council
Irisin hormone is involved with white fat to brown fat conversion
Study gave just a single dose of 100,000 IU of vitamin D to young healthy adults
The peak level of vitamin D achieved was 30 ng at 3 days – which is less than pharacological level of 40 ng
Even this level was maintained for only a few days