I can’t find a photo that shows the facts, and the only websites I can find are in German, but I’ll translate:
“1 g creme contains as the active ingredient: 100.000 IE Nystatin corresponding to 22,73 mg dry-matter.
Other Ingredients: Macrogol stearat 1000 [a different name for polyethylene glycol], cetostearyl alcohol, isopropyl myristate, glycerol 85%, sorbic acid (E200), lactic acid (E270), sodium hydroxide, purified water.”
But this is not meant as a moisturizer. The point of nystatin is not to avoid feeding the malassezia yeast, it is to use an anti-fungal to kill the yeast, so you don’t have to worry about moisturizing. I don’t know why the first anti-fungal I tried didn’t work (specifically miconazole combined with hydrocortisone in a creme). I read somewhere on wikipedia that their ways of killing the yeast are different. The azoles are lanosterol 14
alpha-demethylase inhibitors, while nystatin works by ergosterol binding - it has to do with their cell membranes. Anyhow, the details are not important to us, the important thing to learn from this is that “anti-fungal” is a broad term and it would be a mistake to think no anti-fungal will work simply because one didn’t. So try another angle of attack
Personally I haven’t heard of sulfacetamide 10% and sulfur 5% or tried it on myself, but wikipedia says it is a suggested treatment. Maybe Michael has some experience with it?