For dry and sensitive skin, she recommends combining equal parts Greek yogurt, raw sweet potatoes and flax seeds in a blender.

WSJ: Face Masks: Please Do Try This at Home | Outer Beauty

Add to this, alcohol - some say never, others say sometimes - flax seed (I'm now told), pate, liver, raw eggs, marlin, shark, hot baths and saunas.

BBC: NEWS | UK | Confused, guilty and pregnant