l-carnitine what is it Nutrex Research L Carnitine 3000 - Clinically Dosed Liquid for Energy, Metabolism & Muscle Recovery - Delicious Berry Blast Flavour - No Sugar, No Carbs, No Stimulants Compounded Carnitine (L) Injection |

This is the primary source for PK of the non-DAC modified version and explains why it is dosed daily rather than weekly

Isolation and characterization of cDNA and genomic clones encoding human muscle type carnitine palmitoyltransferase I

Gpx4 protects mitochondrial ATP generation against oxidative damage

Again, and they attribute it to the compound is not pure potentially because its not regulated, so who knows what youre injecting yourself with, and/or you just freak out because you injected yourself with a compound that you dont really fully trust, so its a lot of mental components as well

The timeline for firmness improvements typically runs longer than for fine lines, with maximum benefits appearing around 3-6 months