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Another type of post-translational modification is methylation by arginine methyltransferases (PRMTs), in which arginine can be methylated to either monomethylated arginine or dimethylated arginine

doi: 10.1097/HTR.0000000000000464 23 KatsumotoA.TakeuchiH.TanakaF

High concentration per vegetable capsule: 1 gram of L-Carnitine Tartrate The dose of L-Carnitine L-Tartrate studied in scientific studies varies between one gram and 3 grams as the range most frequently linked to the effectiveness of the compound

10.1016/j.intimp.2017.03.029 82 WangP.LiuX.SongY.LiuX.WangX.ZhuK.et al (2025)

In addition, the relevance of doping, especially of herbal ingredients, is subject to continuous change