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Fasting insulin, HOMA-IR, LH/FSH ratio, total and free testosterone, and SHBG together define which phenotype you present with and which intervention is most likely to move the needle

Sci Rep 6:111 Huang X, Fang Q, Rao T, Zhou L, Zeng X, Tan Z, Chen L, Ouyang D (2020) Leucovorin ameliorated methotrexate induced intestinal toxicity via modulation of the gut microbiota

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A landmark study published in Cell Host and Microbe reported lasting improvements in both gastrointestinal symptoms and core ASD behaviors at two-year follow-up

But it does not bypass the glycine requirement at step two