by Dr. Michael McKelvey There are a few important factors to consider when choosing to have neurotoxin injections to help combat signs of aging in your skin. What brand are you receiving? Currently there are four neurotoxins that are FDA approved for cosmetic use in the US: Botox, Dysport, Xeomin, and Jeuveau. These are all derivatives of botulinum toxin and work by the same mechanism to block the ability of small muscles of the face to contract and cause wrinkling of the s