Variants in GLP1R (the GLP-1 receptor itself), GIPR (rs1800437 is the headline variant for differential GLP-1 response), FTO (appetite regulation), MC4R (satiety signaling), and TCF7L2 (insulin response) are associated with measurably different response patterns to semaglutide and tirzepatide
Furthermore, topical application of retinoids on melasma lesions could potentially be associated with secondary hyperpigmentation as a result of drug-induced irritation (Pitowska et al., 2022)
Without this step, the bolus would remain too acidic to bind with intrinsic factor, a protein that pairs with B12 so that the body can use it
Fenzi F, Moretto G, Zamboni G, Passarin MG, Rizzuto N: Brain metastases from post-radiation malignant peripheral nerve sheath tumour