You want: More growth, and some shine wouldn't hurt
Try eating more: Probiotics
Inflammation can interfere with normal hair growth, and there's some research with animals suggesting that controlling inflammation by feeding your gut the right foods can counteract those damaging effects. A
study in PLOS One reports that mice fed probiotics had more robust fur growth and shinier fur than mice in the control group, who didn't get any beneficial bacteria in their diets. Whitney Bowe, MD, a clinical assistant professor of dermatology at Mount Sinai Medical Center, in New York, recommends three servings per day of probiotic-rich foods and drinks like miso paste (found in miso soup), yogurt with live active cultures, kefir and kombucha.
