The perception that they are rare comes from the fact that most people do not discuss lip pigmentation openly, not from any actual rarity of the condition
Stancheva R, Paunova-Krasteva T, Topouzova-Hristova T, Stoitsova S, Petrov P, Haladjova E
Its a type of vitamin C supplement that is delivered inside tiny particles of fat
Now, you actually do back into BMI, but they actually took it out of the labeling
These areas not only look and feel unpleasant, but they also severely impair the absorption of the peptide
Dose-dependent cytotoxicity is pronounced, as high concentrations disproportionately reduce cell viability, and even low doses of small NPs (e.g., 18 nm) trigger significant toxicity (Gandamalla et al., 2019