if really always indoor vit D will help. Vit C I cannot say much about effects personally but i take anyway since quite cheap. Multivitamin I plan to start taking but only pecific ones, most commercial grade multivitamins are super low dose like completely useless like that. Might help kids but im a big boi

Just for general knowledge, I absolutely recommend this youtube channel
https://www.youtube.com/channel/UCoR7CHkMETs3ByOv74OAbFw

just 10/10 information and education on supplementing especially for health and bodybuilding. As for getting those supplements, personally I buy from iHerb since they're generally cheaper than buying locally. never had an issue with them. always go for skynet delivery since its cheaper (sometimes free) and less likely get taxed by kastam.

and if you don't mind please use my referral code DGQ0670 as it helps both of us get a decent discount above the already cheaper prices.