Cycling UK Forum

Daily oral dosing of vitamin D3 using 5000 TO 50,000 international units a day in long-term hospitalized patients: Insights from a seven year experience.

Conclusion: "Daily oral intake of vitamin D3 ranging from 5000IU/day to 60000IU/day for several years was well tolerated and safe... in both our patients and staff"

https://www.sciencedirect.com/science/a ... 6018306228

A new study found that 80ug of vitamin D supplement a day reduced the risk of developing AF by a third.

It does beg an obvious question for anyone with AF and a history of severe vitamin D deficiency.

Paper here.

I take carbamazepine for my epilepsy. It is also prescribed for schizophrenia and other mental disorders. My neurologist advised my GP to prescribe 20000 units of Vit D once a fortnight because apparently carbamazepine interferes with the absorption of Vit D. Anybody reading this who takes carbamazepine (trade name often Tegretol) might be well advised to discuss the matter with their GP and/of neurologist.