It only took me about 20 years to make the discovery, thanks to effective muscle testing at a local herb store here in Atlanta, but seborrheic dermatitis on the face can be managed by 3 things:
1. Taking Caprylic acid supplements (used to fight candida and fungal infections)
2. Taking a potent probiotic strain (mine contains l. acidophilus, l. rhamnosus, l. casei and b. longum)
3. Avoiding milk as much as possible
This is not a cure, but taking the above 2 supplements will make the rash disappear. 1-2 weeks to see results. It you have seb derm on the scalp, these 3 suggestions also may work for you too. Please let me know if it helps anyone!