Frown lines form when facial expressions are made as the muscle under the skin contracts. Over time, as your skin ages, these repeated expressions cause lasting frown lines. Xeomin® blocks the release of chemicals that cause these muscle contractions so frown lines are softened. Xeomin® uses a state-of-the-art manufacturing process that removes the accessory proteins that don’t play an active role in treatment making Xeomin® the most highly purified neurotoxin currently available and patients are far less likely to become resistant to it. Improvement can be seen in as little as 2-3 days with full results noticeable within 7-10 days after treatment. Results can last up to 4 months.