For PCOS, Mounjaros additional GIP mechanism is directly relevant because GIP improves insulin sensitivity, the core driver of the condition
By self-injecting semaglutide using weekly pre-filled pens, patients feel fuller and consequently consume fewer calories, leading to weight loss
A study from 2011 took subjects with chronic non specific low back pain (meaning there was no specific reason for their back pain) and gave them three injections of Vitamin B12 per week over a two week period
References: Ferreira GC, McKenna MC. L-Carnitine and Acetyl-L-carnitine Roles and Neuroprotection in Developing Brain. Neurochem Res. 2017 Jun;42(6):1661-1675. doi: 10.1007/s11064-017-2288-7. Epub 2017 May 16. PMID: 28508995; PMCID: PMC5621476. Link
They can develop due to acne, prolonged sun exposure, aging, or previous skin infections