It is derived from glucoraphanin (also known as sulforaphane glucosinolate or SGS), a compound found in exceptionally high concentrations in cruciferous vegetables, most notably in broccoli seeds and young broccoli sprouts
For example, Paloma Vega, M.S., RD, LD, points to a recent review of 38 randomized controlled trials that found green tea consumption led to higher levels of antioxidant enzymes, such as superoxide dismutase and glutathione peroxidase, which can help combat oxidative stress

The rationale is straightforward: oxidative stress is a recurring theme in egg-quality research, and these ingredients are included to support antioxidant capacity.57 For alpha-lipoic acid and grape seed extract, fertility-specific human data are earlier-stage and largely supportive or mechanistic rather than definitive.58 59 In human studies where these ingredients are evaluated for metabolic or antioxidant effects, the doses used are typically higher often around 300600mg per day for alpha-lipoic acid and 100200mg per day for grape seed extract which suggests their role here is complementary rather than central.60 61 The vitamin E dose (67mg) is a common supplemental amount, well above the adult recommended daily allowance (RDA) of 15mg and still far below the established upper limit of 1,000mg per day.62 One practical consideration is dose flexibility
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Amino acid-dependent mTORC1 regulation by the lysosomal membrane protein SLC38A9