Answers (2)

Karen M. answered
My sister gets this stuff called 'bio-oil'  When she was pregnant, she put it on to protect against stretch marks.  She then realized that it also made some go away!

awesome right?  I'm not sure about the ingesting type, but if it does that much good on the outside, I bet it would do equally good on the inside.
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hilejo answered
I took biotin regularly for a while in college and really should start doing this again because it was miraculous! My skin cleared up beautifully and my hair and nails grew faster and stronger :)
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