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5 Best Hair Serums of 2025

Last Updated - 2025/09/30

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Paul Mitchell

Paul Mitchell Super Skinny Serum Blowout Primer, Speeds Up Drying Time, Humidity Resistant, For All Hair Types, 150 ml

Paul Mitchell

CA$38.50

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- Strands are left silky-smooth with a delightful fruity fragrance
- Lightweight silicones coat and seal each strand, repelling water in the process
- Humidity-resistant formula protects against frizz no matter the weather
CA$38.50
2
Best Value

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

L'Oreal Paris

L'Oréal Paris Hair Expertise Density Booster Hair Serum, with Aminexil-R for Fall Due to Breakage, Pack of 1, 102ml

L'Oreal Paris

CA$25.49

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Main highlights
- Hair serum: this scalp serum reduces breakage with our advanced formula, designed to strengthen hair from root to tip for thicker and fuller hair.
- Gentle Massage: Massage gently to ensure the product penetrates the scalp, promoting healthier hair density.
- Frequent Use for Best Results: Use 5-7 times per week to see a significant reduction in hair fall due to breakage and improved hair density.
- Easy Application: Apply once daily to scalp, section by section, for even distribution and maximum benefit.
- Density Booster Shampoo, Conditioner & Scalp Serum System: A complete hair care regimen that works together to minimize breakage and enhance hair strength.
CA$25.49
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

TRESemmé

TRESemmé Keratin Smooth Weightless Silk Serum for heat protection, manageability, shine and hair smoothing salon quality 97 ml

TRESemmé

CA$18.90

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Main highlights
- The TRESemmé Keratin Infusing Smoothing Serum helps to eliminate frizz and seals in shine for a polished, smooth look.
- TREND LED, RIGOROUSLY TESTED: Our hair care experts are at the forefront of science & safety. Each ingredient in our hair serum is carefully selected to ensure your hair gets the best possible care.
- INTENSE SALON SHINE: This smoothing serum treatment helps seal in shine for a smooth, polished look
- IMPROVED MANAGEABILITY: Our hair smoothing serum contains keratin for silky smooth hair that is healthy and polished, while also protecting from heat during blow drying
- Helps eliminate frizz and Illuminates shine
- HAIR SMOOTHING SERUM: TRESemmé Keratin Smooth Weightless Silk Serum helps you to achieve the glossy look of a professional blow-dry style that is full of natural movement
- HAIR CARE TIPS FROM OUR STYLISTS: Dispense hair serum into palm of hand and rub hands together. Apply from the mid-lengths of damp hair through to the ends. It can also be used on dry ends.
- DO IT WITH STYLE: With professional quality hair products such as Keratin Smooth Weightless Silk Serum, you can create your personal style to achieve your aspirations with confidence
- Controls frizz for up to 48 hours
CA$18.90
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

L'Oreal Paris

L'Oréal Paris Hair Expertise Bond Repair Leave-In Serum, 150ml

L'Oreal Paris

CA$13.19

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Main highlights
- Suitable for all types of damaged hair
- Our formula powered by Citric Acid Complex targets weak hair bonds. Hair is restored to its original strength*. Up to 98% less breakage, 90% more shine & 82% stronger hair**
- Discover the Bond Repair Leave-In Serum by L’Oréal Paris. This leave-in hair serum forms the final step of the Bond Repair haircare regime.
- Bond Repair Leave-In Serum is powered by 20% Citric Acid Complex to seal the cuticle for maximum care & rebuilds inner broken hair bonds
- After using the Bond Repair Pre-Shampoo Treatment, Shampoo, and Conditioner, rub two drops between the palms of your hands. Apply evenly through the lengths and ends of wet or dry hair.
CA$13.19
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Botanic Hearth

Botanic Hearth 100% Pure Rosemary Oil For Hair Growth (6.7 fl oz) Infused With Biotin, Jojoba & Castor Oil | Hair strengthening Treatment | Nourishing & Volumizing | Non GMO Verified

Botanic Hearth

CA$21.99

More Details
Main highlights
- Helps Promote Hair Thickening: Botanic Hearth Rosemary Cold Pressed Hair Oil, made with organic rosemary, helps thicken hair strands by strengthening hair follicles and fighting hair breakage
- Helps Promote Hair Growth: The organic rosemary oil for hair growth is infused with ingredients like biotin, jojoba, and castor oils, all of which work together to nourish the scalp and promote stronger, healthier hair
- Helps Fight Dandruff: The hair growth oil for women, containing rosemary essential oil for hair growth, helps soothe and nourish the scalp, reducing inflammation and dryness that contribute to dandruff
- Ethically Sourced & Cruelty-free: Botanic Hearth products, including their rosemary hair oil organic, are ethically sourced, cruelty-free, paraben-free, sulfate-free, and free from harsh chemicals, offering a cleaner, more sustainable choice for hair care
- Deep Hydration: The nourishing ingredients in this oil, such as natural rosemary oil, provide deep hydration and improve hair texture, thereby enhancing overall hair health
CA$21.99

5 Best Hair Serums of 2025

Paul Mitchell Super Skinny Serum Blowout Primer, Speeds Up Drying Time, Humidity Resistant, For All Hair Types, 150 ml

L'Oréal Paris Hair Expertise Density Booster Hair Serum, with Aminexil-R for Fall Due to Breakage, Pack of 1, 102ml

TRESemmé Keratin Smooth Weightless Silk Serum for heat protection, manageability, shine and hair smoothing salon quality 97 ml

L'Oréal Paris Hair Expertise Bond Repair Leave-In Serum, 150ml

Botanic Hearth 100% Pure Rosemary Oil For Hair Growth (6.7 fl oz) Infused With Biotin, Jojoba & Castor Oil | Hair strengthening Treatment | Nourishing & Volumizing | Non GMO Verified

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L'Oreal Paris Dream lengths Sleek Frizz Eraser Serum with Keratin and Castor Oil, 100 Milliliters

L'Oreal Paris Hair Expertise Hyaluron Plump 2% Moisture Plump Serum, with Hyaluronic Acid, 150ml

Garnier Whole Blends Hair Honey Repairing Serum for Dry Damaged Hair, Non-sticky & non-greasy, Smoother hair & split ends reduction, 150ml

L'Oréal Paris Hair Expertise Glycolic Gloss Shine Leave-In Serum, With Glycolic Acid For Shine and Smoothness, 150ml

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