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Scientific research is ever-evolving and requires constant updating

Sun S, Li F, Li M, Zhang W, Jiang Z, Zhao H, Pu Y, Ragauskas AJ, Dai SY, Zhang X, Yu H, Yuan JS, Xie S (2023) Lytic polysaccharide monooxygenase synergized with lignin-degrading enzymes for efficient lignin degradation

Oral contraceptives, which interfere with B6 metabolism, have also been associated with low levels

The addition of GSH to the maturation medium resulted in a significant improvement in oocyte quality, as evidenced by the higher proportion of oocytes reaching the MII stage compared to the controls

If you're considering L-theanine for attention benefits (not just sleep), the research only supports the combination