glutathione is a steroid or not deficiency induces epigenetic alterations of vitamin D metabolism genes in the livers of high-fat diet-fed obese mice Glutathione: Benefits and Supplements
Description
For those following a vegetarian or vegan diet, B12 is naturally scarce
The mechanism appears to involve changes in how skin bacteria produce porphyrins, compounds that can promote inflammation within hair follicles

"Effects of nonsteroidal anti-inflammatory drugs on glutathione S-transferases of the rat digestive tract." Carcinogenesis, 18(3), 485490

doi: 10.1111/aji.13854 19 YangYXiaJYangZWuGYangJ

95% CI: 0.170.70

10.1016/S0076-6879(78)52032-6 9 CaiY.LinL.ChengW.ZhangG.WuF