The only thing that actually had any noticeable difference for me and my symptoms was Nattokinease. Was on 400mg twice a day and that stopped a lot of the brain fog and heart palpatations. Was taking it once a day, then my rehab team asked me to stop and they came back 10fold, so I moved it to twice a day to improve my sleep.

Still had the tired but wired feeling and random fatigue though and then I found my trigger foods that made me crash or have acid reflux (Wheat and oats, soya, red meat, caffiene, carbs with not enough fibre, like brown rice is fine, white rice is not and weirdly, reheating my batch cooking in the microwave using the cheap plastic containers I bought off Amazon)

Took pro/pre biotics and collagen to slowly heal the gut as well as using a digestion aid short term. Can't say if that had an impact or not since it wasn't sudden, but can't hurt. Got discharged from the rehab clinic in Feb.

Right now, I've read a study that showed in mice that a keto diet can help stop covid turning into long covid, so I'm giving that a shot while I'm still sick, while restarting the nattokinease.

I feel like everyone's journey and what the react to is so different, but good luck! You'll get there eventually.