L-Carnitine works by facilitating the movement of fatty acids into the mitochondria of cells, where they are oxidized to generate energy
Persistent markedly low serum potassium (less than 3 mEq/L, and a reduction from pre-treatment of greater than 0.5 mEq/L at two consecutive visits or at the final visit) occurred in 0.2% receiving QSYMIA 7.5 mg/46 mg dose and 0.1% receiving QSYMIA 15 mg/92 mg dose, compared to 0.0% receiving placebo
doi:10.1038/s41573-023-00823-1
Long-term overconsumption of B6 can cause severe neurological symptoms, skin lesions, sensitivity to light, nausea, and heartburn, with some of these symptoms occurring at intakes of 16 grams per day (17)
These aren't just vitamins
Proteins in total homogenates (2040 g) or nuclear extracts (40 g) were resolved by 10% SDS-PAGE and immunoblotted using following primary antibodies: chicken polyclonal antibodies against mouse GCLM 7 and mouse ALDH1A1 60