Keep your waist to less than half your height. Dr. Agullo on why that number is more useful than BMI, how to measure it at home, and the four habits that move it.

Peptides are easy to buy online and hard to do correctly. Dr. Agullo walks through what the first visit covers, what labs come before the first dose, and why some protocols run for years while others stop at eight weeks.

Twenty-three trials, 1,474 people, and one uncomfortable pattern in who funded them. What collagen actually does, and why the chips do not count.

Insulin is a peptide. So is your serum. So is that vial from an overseas site. Dr. Agullo explains what peptides actually are and which ones are worth it.

Inside the peptide wellness program at Southwest Plastic Surgery: how Dr. Frank Agullo uses NAD plus and GHK-Cu as a quiet, evidence-led answer to aging.