About 3 more portions of fruit and veg a day. Judge it at week six.

In a six-week study, eating more fruit and vegetables visibly changed skin colour, through carotenoids. About three extra portions a day, judged at six weeks, not six days.
P Evidence: promising. Good studies, but small or few. Use it and keep checking.
Whitehead et al. 2012 (n = 35, mostly Caucasian sample).
Not medical, legal or financial advice.
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