John Frieda ULTRAfiller+ Hair Density Scalp Serum 2 oz — lightweight volumizing serum with biotin & caffeine for finer, fuller-loo

John Frieda ULTRAfiller+ Hair Density Scalp Serum is a lightweight scalp treatment formulated with biotin, peptides and caffeine to support fuller-looking, thicker-feeling hair without weighing fine strands down.

Designed as the third step in the ULTRAfiller+ routine, this 2 oz serum targets the scalp environment to help hair appear denser and more resilient. Its fast-absorbing formula melts into wet or dry hair, leaving no greasy residue, and pairs with a shampoo, conditioner and finishing spray in the same line. The serum is cruelty-free, vegan-friendly and formulated without parabens, phthalates or synthetic dyes.

How does this serum help fine hair look fuller?

The serum combines ingredients aimed at strengthening hair at the root and promoting a healthier scalp environment, which can improve the appearance of density over time. It’s lightweight so it won’t flatten delicate strands, and is intended for daily use.

• Biotin to support hair structure and manageability
• Peptides to help fortify fragile hair fibers
• Caffeine to refresh the scalp and enhance the feeling of revitalized roots
• Non-greasy texture absorbs quickly into the scalp

When and how should I apply the scalp serum for best results?

Apply the serum directly to the scalp on wet or dry hair as the final step after cleansing and conditioning. Use the recommended amount and massage into the roots to ensure even coverage; styling can follow immediately since the formula is fast-absorbing.

• Use daily for consistent scalp care and styling prep
• Apply to sections for targeted coverage at thinning areas
• Massage gently to distribute product and stimulate circulation
• Safe to layer under other styling products or heat protectants

Will this serum weigh my hair down or leave build-up?

No—this formula is specifically created for fine and thin hair, so it’s lightweight and non-greasy. Regular use with the matching shampoo and conditioner helps prevent residue while maintaining the look of fuller hair.

• Fast-absorbing, non-oily finish
• Formulated to avoid heavy silicones that can weigh fine strands
• Pairs with clarifying or thickening shampoo to remove buildup
• Designed for everyday wear without stiffening hair

What ingredients should I expect and are they safe?

The serum features a blend of biotin, peptides and caffeine along with cosmetically functional bases that enable quick absorption. It’s formulated free from parabens, phthalates and dyes and is vegan-friendly and cruelty-free. As with any topical product, review the full ingredient list if you have sensitivities.

• Key actives: biotin, peptides, caffeine
• Free from parabens, phthalates and synthetic dyes
• Vegan formulation, not tested on animals
• Suitable for men and women with fine or thinning hair

Who is this for? If you have naturally fine, limp or thinning hair and want a lightweight scalp treatment that supports the look of thicker, fuller hair without heavy residue, this serum fits into a multi-step routine to strengthen roots and improve hair manageability. It’s made for daily use on wet or dry hair and works best when combined with the matching ULTRAfiller+ shampoo, conditioner and finishing spray.

Ingredients

See packaging for ingredient details