Marc Anthony Grow Long Scalp & Hair Serum, 2 fl oz anti-breakage with biotin for stronger, fuller hair

Marc Anthony Grow Long Scalp & Hair Serum is a lightweight anti-breakage treatment designed to strengthen hair fibers at the root and support longer, healthier-looking lengths.

This concentrated 2 fl oz formula targets the scalp and hair shaft with conditioning actives like rosemary oil, caffeine, ginseng and biotin to help reduce breakage and improve manageability. It’s intended to reinforce existing strands and create a resilient foundation for length retention — it does not stimulate new hair growth. The serum is free from parabens, sulfates (SLS), and phthalates, and is suitable for use on damp or dry hair as part of a daily styling or care routine.

How does this serum help reduce breakage?

The serum strengthens fragile hair fibers at the scalp and along the shaft so strands are less likely to snap during styling or brushing. Nourishing oils and conditioning botanicals smooth cuticles and improve flexibility, which helps hair endure daily handling.

• Rosemary oil helps condition the scalp and fortify follicles' support for existing strands.
• Caffeine and ginseng provide a lightweight conditioning boost to improve strand elasticity.
• Biotin helps hair feel thicker and more resilient to mechanical stress.
• Formula avoids heavy silicones, leaving hair touchable rather than weighed down.

What’s the best way to apply it for everyday use?

Apply the serum directly to scalp sections and massage gently, then comb through to distribute the product to lengths. Use on damp hair before styling or on dry hair to tame frizz and protect against breakage; a little goes a long way with this concentrated dropper-style serum.

• Section hair and apply a few drops to the scalp where hair parts.
• Massage for 30–60 seconds to ensure even coverage and absorption.
• Comb through to coat mid-lengths and ends, then style as usual.
• Use daily or as-needed for extra smoothing and strengthening benefits.

Which ingredients are inside and what do they do?

The Grow Long serum blends botanical oils with science-backed conditioning agents to support hair integrity without heavy residue. Each component plays a targeted role in strengthening, conditioning, or improving manageability.

• Rosemary oil — conditions scalp and helps strengthen the base of hair strands.
• Caffeine & ginseng — provide a lightweight conditioning effect to enhance elasticity and reduce snap.
• Biotin — supports the appearance of thicker, fuller-looking strands.
• Free-from list — paraben-free, SLS-free, sulfate-free, phthalate-free for everyday use.

How quickly will I notice results?

Visible smoothing and easier detangling can appear after the first use because the serum conditions and seals the strand surface. Noticeable reductions in breakage and improved length retention typically appear with consistent use over several weeks as hair fibers become stronger and more elastic.

• Immediate: reduced frizz, smoother texture, easier comb-through.
• Short term (2–4 weeks): fewer split ends and less breakage from styling.
• Long term: stronger-feeling strands and better length retention when used as part of a routine.

Who this is for: Marc Anthony Grow Long Scalp & Hair Serum suits anyone looking to protect fragile lengths and reduce daily breakage — ideal for people growing out hair, those with chemically processed or frequently styled hair, and anyone who wants smoother, more resilient strands without heavy silicone build-up. It’s formulated for all hair types and works well combined with the rest of the Grow Long collection for a full-strengthening regimen.

Ingredients

AQUA/WATER/EAU, PROPANEDIOL. BIOTIN, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF EXTRACT, CAFFEINE, PANAX GINSENG ROOT EXTRACT, SACCHARUM OFFICINARUM (SUGAR CANE) EXTRACT, CITRUS MEDICA LIMONUM (LEMON) FRUIT EXTRACT, PYRUS MALUS (APPLE) FRUIT EXTRACT, CAMELLIA SINENSIS LEAF EXTRACT, HYDROLYZED YEAST PROTEIN, ALOE BARBADENSIS LEAF JUICE, MENTHOL, TOCOPHERYL ACETATE, PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE, HYDROXYPROPYL GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE, GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE, POLYQUATERNIUM-10, POLYQUATERNIUM-11, POLYQUATERNIUM-37, POLYQUATERNIUM-55, HEXAPEPTIDE-11, PPG-1 TRIDECETH-6, GLYCERIN, ZINC PCA, CITRIC ACID, CETRIMONIUM CHLORIDE, HEXYLENE GLYCOL, BUTYLENE GLYCOL, CAPRYLYL GLYCOL, BETAINE, ISOPROPYL ALCOHOL, LEUCONOSTOC/RADISH ROOT FERMENT FILTRATE, ETHYLHEXYLGLYCERIN, SODIUM BENZOATE, POTASSIUM SORBATE, PHENOXYETHANOL, PARFUM/FRAGRANCE, LINALOOL, BENZYL ALCOHOL, BENZYL SALICYLATE, CITRONELLOL, HYDROXYCITRONELLAL