In the best-case scenario, you may not experience any side effects from using the patches, but doctors warn that you may have nausea, trouble sleeping, anxiety, an increased heart rate, or skin irritation
doi:10.1093/ajcn/86.5.1563S
Some people notice a mild temporary skin reaction at high concentrations, in which case you can reduce the dose, pause, or consult your physician
to identify the counties within these service areas
Male Reproductive Health: May improve sperm quality and motility
These changes are perfectly normal and there's no need to worry about them, but companies are now capitalising on our well-ingrained fear of pre-mature ageing, by flooding the market with collagen drinks