Viviscal Hair Thickening Serum — Leave-In 1.69 fl oz, Lightweight Biotin & Keratin Elixir for Thicker, Fuller-Looking Hair

Viviscal Hair Thickening Serum is a lightweight leave-in elixir that instantly coats each strand to create the appearance of thicker, fuller-looking hair without added frizz.

Built on Viviscal’s 25+ years of hair science, this 1.69 fl oz serum combines key hair-building ingredients — Biotin and Keratin — with Marine Collagen and Seaweed extract to add multi-dimensional density and a fuller look. The non-greasy formula layers easily into damp or dry hair and is free from parabens, SLS and SLES, making it suitable for daily styling routines. For a comprehensive approach to thicker-looking hair, pair topical styling with Viviscal supplements that support hair health from within.

How quickly will I notice thicker-looking hair after using this leave-in serum?

The serum provides an immediate cosmetic effect by coating the hair shaft, so you should see enhanced texture and visual density right after application. Long-term visual improvements depend on continued use and integrating supportive haircare habits.

• Instant visual thickness by coating strands for multi-dimensional density.
• Lightweight finish avoids weight and reduces the appearance of limpness.
• Daily application maintains the coated look over time.

How do I apply Viviscal Hair Thickening Serum for best results?

Dispense 2–3 pumps into your palms, then spread through mid-lengths and ends on damp or dry hair using fingers or a comb. Focus on areas that need extra body; the formula works as a styling layer and won’t leave hair greasy if used sparingly.

• Use 2–3 pumps per application; adjust for hair length and thickness.
• Apply from mid-lengths to ends to avoid weighing down roots.
• Comb through or finger-style to distribute evenly before styling.

What are the key ingredients and how do they contribute to a fuller look?

This serum blends recognized hair-builders like Biotin and Keratin with Marine Collagen and Seaweed extract to improve strand texture and reflect light for fuller-looking hair. These ingredients focus on coating and strengthening the fiber surface rather than altering the scalp.

• Biotin and Keratin: support improved strand texture and manageability.
• Marine Collagen: helps add body and a plumper visual profile to each hair.
• Seaweed extract: provides natural minerals that help condition and smooth fibers.

Will this serum weigh my hair down or create buildup?

The formulation is intentionally lightweight so it adds dimension without heaviness when applied as directed. Because it’s free from parabens, SLS and SLES, daily use is practical; occasional clarifying shampooing can prevent any styling buildup if you use multiple products.

• Non-greasy texture designed for daily styling routines.
• Paraben-, SLS- and SLES-free to minimize harsh residues.
• Use sparingly to maintain lift at the roots and avoid heavy layering.

Who is this for: Viviscal Hair Thickening Serum is designed for women noticing changes in hair density who want an instant, cosmetic boost in fullness and texture without heavy styling agents. It’s ideal for fine to medium hair types seeking added body, people who style daily and anyone who prefers a lightweight leave-in that layers with other Viviscal haircare and supplements. Avoid direct medical claims; if you have scalp conditions or significant hair loss, consult a dermatologist for a tailored plan.

Ingredients

Aqua (Water), Alcohol Denat., Polysorbate 20, Benzyl Alcohol, Alcohol, Hydroxyethylcellulose, Polyimide-1, Parfum (Fragrance), Chlorphenesin, Soluble Collagen, Dehydroacetic Acid, Pisum Sativum Sprout Extract, Hydrolyzed Keratin, Glycerin, Trisodium Ethylenediamine Disuccinate, Chondrus Crispus (Carrageenan) Extract, Fucus Vesiculosus Extract, Laminaria Digitata (Kelp) Extract, Sea Salt (Maris Sal), Leuconostoc/Radish Root Ferment Filtrate, Biotin, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Linalool, Hexyl Cinnamal, Limonene, Citronellol, Eugenol.