Dr. Devgan Scientific Beauty Hyaluronic Serum in Beauty: NA. Dr. Devgan Scientific Beauty Hyaluronic Serum in Beauty: NA. Our mixed-molecular weight Hyaluronic Serum is the latest innovation in skin care for a ?glass skin? look. It boosts collagen, smooths the appearance of fine lines, hydrates the skin, improves dermal barrier function, and reactivates collagen and elastin production.. Vegan and cruelty-free.. Suitable for combination, dry, sensitive, and normal skin types.. Fragrance free, dye free, sulfate freearaben free, gluten free, formaldehyde free, propylene glycol and hexylene glycol free. 30 mL / 1.0 fl oz. Apply a full dropper of serum onto a freshly cleansed face and neck. Allow the serum to absorb fully before applying moisturizer or makeup. May be used twice a day or as often as desired. DDEV-WU3. SQ6390490.