I'm sorry that I can't give you any advice about using Grapefruit-Seed-Extract internally, but I used it externally on my skin yeast infection on my legs with no significant improvement. I also didn't see any improvement applying tea tree oil topically on the yeast infection. I don't post on the Candida Forum anymore, but I am very concerned about your skin yeast infection. If you don't get it under control, it can become very serious, even life threatening if the infection breaks the skin barrier and enters your blood stream. My advice is to see a doctor immediately and get on Difulcan and/or Nystatin to get the infection under control. It took me nine months to overcome my skin yeast infection, so it's a long hard slog. I would also take a parasite cleanse to get rid of any parasites you may have accumulated on the way that may be causing the yeast infection.