A new review has concluded that men who are undergoing botox treatment to improve the appearance of their skin tend to need higher doses than women in order to achieve similar results.
The review, which is published in the journal Dermatologic Therapy, pointed out that men have a greater muscle mass than women, meaning that they often need more units of botox.
The findings reflect observations that larger, stronger men tend to need more units per botox treatment than men who are slender and provide an explanation for some inadequate results in male patients.
Author Dr Timothy Corcoran Flynn wrote: "Men have a growing interest in cosmetic dermatologic treatments.
"Botulinum toxin type A treatment offers a minimally invasive approach to improving facial lines and is often the first cosmetic procedure chosen by male patients.
"In general, men can be treated with the same techniques as women, but often require more units."