@jnmaciuch I just came across a paper about about dietary malic acid enhancing oxidative muscle fiber types (slow twitch fiber that came up in Wust’s research) that I thought was really interesting. I’m not sure if you’ve mentioned this before because I can’t read through this whole thread. I’ll attempt to post a link below.
I’d googled malic acid fiber because I’ve been taking sumac once in a while and it seems to have a stimulant effect on me, hard to say if it’s actually energy though. I took it with a high fiber supplement yesterday and didn’t feel as much hence the search.
The aim of this study was to investigate effects of dietary malic acid supplementation on skeletal muscle fiber-type transition during nursery period and the subsequent meat quality of finishing pigs. Results showed that malic acid supplementation ...
pmc.ncbi.nlm.nih.gov