Thanks, George. I’m a new Australian (U.S. transplant) and still getting up to speed on the local medical culture. But, re: SAD/mood, bright-light therapy is first-line; I treat vitamin D as “correct deficiency, don’t expect it to replace standard care.”
On MS (the bit I didn’t cover well): Higher lifelong 25(OH)D is linked to lower MS risk (observational + genetic lines point the same way). In people already diagnosed, adding high-dose D3 to disease-modifying therapy hasn’t reliably cut relapses; MRI signals are mixed.
So, test and correct deficiency (good general health practice), but don’t expect vitamin D to function as a disease-modifying add-on.
On MS (the bit I didn’t cover well): Higher lifelong 25(OH)D is linked to lower MS risk (observational + genetic lines point the same way). In people already diagnosed, adding high-dose D3 to disease-modifying therapy hasn’t reliably cut relapses; MRI signals are mixed.
So, test and correct deficiency (good general health practice), but don’t expect vitamin D to function as a disease-modifying add-on.