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Kim S, Han S-Y, Lee J, Kim N-R, Lee BR, Kim H et al (2022) Bifidobacterium longum and galactooligosaccharide improve skin barrier dysfunction and atopic dermatitis-like skin

2018 Sep 1;98(5):283-291

doi: 10.1016/j.ncl.2019.06.001

If you want to read about other supplements you might find interest in reading about the benefits of BCAA, as well as the vitamin B12 and nutrition

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Carbidopa/levodopa and Vitamin B6 Interaction Levodopa is converted into dopamine once it reaches the brain, where it replaces the dopamine lost in PD