Smoothing Treatment Capsules with Argireline®30 Capsules KERACELL Smoothing Treatment Capsules with Argireline is a concentrated smoothing serum to help inhibit muscle contractions to relax facial expression lines and wrinkles. These capsules contain 10% Argireline to help reveal a more youthful looking appearance. DIRECTIONS Twist off the end of the capsule and squeeze out half of the capsules contents onto the tip of your finger. Pat the serum around the eye area and fine lines and wrinkles.