Ever since I had Covid 1 year ago my stomach has been very sensitive (gastritis). I'd like recommendations for good quality GF supplements to take daily to improve my overall immunity. Have caught every virus going this winter so I especially want to concentrate on improving immunity. I noticed several people recommend Thorne Basic B so I will get this. At the moment I am taking the supplements listed below but neither of the Vit C are ideal unless they are taken after plenty of food. If you recommend English or American brands thats fine, I can find online. Grateful for your tried and tested tips as am fed up with feeling under par.
Vimergy micro C 500mg or Purehealth Liposomal 1000mg
Gloryfeel D3/K2 sublingual drops
Gloryfeel B12 sublingual drops
Vitall NAC (French brand - I live in France)
Vitall Lions Mane (French brand)
Vegavero Ashwaganda
Catalyons zinc plus liquid (French brand )