Repairs All SkinTypes-The most researched and best active ingredient for lashes is Myristoyl Pentapeptide-17 and it is one of the most potent ingredients ever to support eyelash growth. To be effective, MP-17 has to be listed at least the 3rd ingredient on it’s ingredient list – Meaning this is the required amount studies show to work growing lashes. Myristoyl Pentapeptide-17 is very expensive and its rare that products use the right amount. For full, thick, eyelashes that really stand out, MP-17 is the most proven ingredient for stimulating hair growth in the global research market today- Myristoyl Pentapeptide-17 is #2 in our lash ingredient list. We have also formulated our lash growth serum with very costly Grape Stem Cell and Panthenol (B5), so effective for lash regrowth. The key is compliance, it must be applied at least once daily to see effective lengthening and fuller lashes in about 6 weeks- a little goes a long way…. and for sure can be applied the the brows for hair thickening and filling as well.