As far as I'm aware it's only B vitamins that aren't toxic in high volumes. I take 1,500ug of B12 (60,000% nrv - B12 has fairly poor adoption) for a nervous system disorder, seems to stops my toes going purple...
I dose a similar amount of B12 as you and likewise see real benefits, but I recently stumbled across some research that claims vitamin B6 and B12 supplemenation show increased incidence of lung cancer in men [1]. I'm wondering if any of the above physicians can comment on this research.
">55 mcg/day [B12] was associated with a 98% greater risk"
Wow, that is quite a staggering increase! Luckily it was men who smoke; "As for never-smokers, the paper states they “were excluded from the smoking-stratified analysis because of the low number of participants with incident lung cancer in that group.”
It's interesting how woman weren't affected, but I am all too aware of the link between smoking and lung cancer as the two go hand in hand. My father died of lung cancer and we didn't part on the best of terms as he had a bad cough for a over a decade before being diagnosed, I lacked sympathy as it was virtually a given. Seeing patients needing to go outside to smoke (often with an IV attached) as they are dying is something I'll never get my head. I would name it the Darwin ward, but that is probably insensitive... (ASD)
It makes me angry that medics won't even condon, let along recommend smokers switch to vaping due to politics. They could save 100,000's of lives per year in the US alone (480k smokers die per year).
Works well. I've been taking at least 50,000 IU/day for over 2 years and serum calcium is always in range. I add milligrams of K2 MK-4, micrograms MK-7, and 100s of mg of magnesium (now over 1g).
