Hi and welcome to steemit, @davidkrantz.
I can reccomend this awesome guide for starters to you.
Is your aproach to nutrition science-based? If yes, this would be of interest for our readers at #steemstem, which is the STEM community here on steemit. Feel also free to check out @steemstem and our discord chatrooms.
Cya around!
Thanks @sco - already finding some great stuff on that channel. Looking forward to contributing!