Dynamic wrinkles develop because facial muscles repeatedly contract whenever you smile, frown, squint, or raise your eyebrows. Over time, these movements crease the overlying skin, gradually transforming temporary expression lines into visible wrinkles. As collagen and elastin decline with age, the skin becomes less able to rebound after each muscle contraction.
JEUVEAU is an FDA-approved neuromodulator containing purified prabotulinumtoxinA-xvfs, a botulinum toxin type A formulated primarily for aesthetic use. After precise injections into targeted facial muscles, it blocks the release of acetylcholine at the neuromuscular junction. Without this, the treated facial muscles contract less forcefully, reducing repetitive folding while preserving natural facial movement. As muscle activity decreases, the overlying skin gradually smooths, softening existing dynamic wrinkles and helping prevent them from becoming more deeply etched.