Origins Dr. Andrew Weil for Origins Mega-Mushroom Skin Relief Advanced Face Serum features Dr. Weil's famed mega-mushroom blend, now fortified with Chaga and Pleurotus Mushrooms and Sea Buckthorn. So it helps defend against silent skin-agers as never before. Calms. Soothes. Makes skin more resilient. The result: visible aging is slowed. Now that's a relief. Apply to clean face morning and evening, as part of your Mega-Mushroom regime. 100ml.