It is available only as a research chemical with "not for human consumption" labeling
Collagen peptides strengthen hair strands and improve elasticity, promoting thicker, healthier hair
many are marketed under familiar drug names but sold as "research-grade" products meant for laboratory use, not human treatment, and their ingredients, strength, and sterility can vary or be contaminated and mislabeled (goodrx.com)
Vitamin B12 shots can help boost energy levels, improve mood, support brain function, enhance metabolism, and promote healthy red blood cell production
Your body naturally produces them, and they act as messengers that help regulate key functions like metabolism, appetite, and blood sugar