vit D can only be absorbed from sunlight if the sunlight directly hits your un blocked and uncuvered skin. it can't pass through clothing , shade or suncream! I am not sure if it can pass through water in a pool but guess it would get distorted in the process if it could!
i am unsure what longterm harm the rat poison has had on me, all i know is i have megga trouble with acid reflux and my down belows, but they could be due to my hiatus hernia, allergies or the fact that my internal muscles are gradually giving up (they started before the rat poison )!