The injection of serum with hyaluronic acid is a complex of active ingredients that works spectacularly, smoothing, making the skin elastic, and providing moisture. Hyaluronic acid positively affects the moisture level and improves the condition of dry skin. By binding water in the epidermis, it smooths and protects against dryness, hydrates, and reduces fine lines. Glycerin naturally envelops the skin, penetrating the intercellular spaces, soothing and moisturizing dry skin prone to cracking. It smooths, improves elasticity, and regulates the processes of proper skin renewal. The effect of glycerin is long-lasting. It penetrates the deeper layers of the stratum corneum and remains there, regulating moisture for 24 hours. It enhances softness, shine, suppleness, skin texture, and reduces fine wrinkles. Collagen and elastin are the fundamental proteins of the skin's connective tissue. Collagen maintains the skin's proper moisture, while elastin gives the skin elasticity and firmness. The effect is visible after the first application. Application: For a tightening and smoothing treatment, apply twice daily to the entire face for 7 days. After a week of treatment, a break of at least two weeks is recommended. It can be used as a treatment for mesotherapy with a mesoroller.