This is where it gets interesting
Islam, R., Bilal, H., Wang, X., & Zhang, L
L-Carnitine

Antioxidant Support: NAC is a biologically active precursor for the amino acid cysteine which, in turn, is a precursor for glutathione, a tripeptide with antioxidant properties.* Supports Intracellular Glutathione: Supplementation with N-Acetyl-L-Cysteine is recognized as a safe, highly effective method of increasing healthy intracellular glutathione stores.* Vitamins/Minerals/Amino Acids: Our vitamins/minerals and amino acid formulas are developed to provide beneficial support in filling nutrient gaps.* Key Feature: Antioxidant Support: NAC is a biologically active precursor for the amino acid cysteine which, in turn, is a precursor for glutathione, a tripeptide with antioxidant properties.* Supports Intracellular Glutathione: Supplementation with N-Acetyl-L-Cysteine is recognized as a safe, highly effective method of increasing healthy intracellular glutathione stores.* Vitamins/Minerals/Amino Acids: Our vitamins/minerals and amino acid formulas are developed to provide beneficial support in filling nutrient gaps.* Country of Origin: USA Manufacturer/Importer/Packed By: Douglas Laboratories

I have not experienced any negative side effects and am averaging 2 lbs
The whitening drip price in Pakistan and skin whitening injections price in lahore typically ranges between PKR 10,000 to PKR 25,000 per session