A very strict
anti-parasitic protocol, which is very similar to an
anti-candida protocol (he may also have candida)
probiotics, parasite cleanse, very low carb diet (no sugars, yeasts, alcohol,etc) and taking demulcent herbs (which can soothe and protect irritated or inflamed internal tissue).
At this point, his ability to properly digest, absorb and
assimilate essential nutrients and vitamins for normal functioning, is questionable.