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Highlights
Summary
Instantly hydrate and detangle even the finest strands with Biolage Hydra Source Daily Leave-In Tonic. This leave-in conditioner, with micro-filtered aloe vera and fermented hyaluronic acid, delivers softness, shine, controls frizz, repairs dry, tangle-prone hair, and protects against heat damage.
Benefits
- This hydrating mask deeply infuses dry, thirsty hair with vital moisture and nourishment.
- Helps prevent breakage and promotes strength, leaving hair feeling softer, healthier, and more resilient.
- Experience 5x more hydration and 14x smoother hair after just one use* for ultimate Hair Repair and Hair Shine.
Key Ingredients
- Aloe: Nourishes hair, promoting lasting hydration.
Research Results
- 5x more hydration after one use*
- 14x smoother hair after one use*
- Hydrated, manageable, and softer feeling hair
- *Hydra Source Shampoo and Deep Treatment Pack vs. non-conditioning shampoo.
Item 2637964
Spray onto damp hair, combing from root to tip, for an instant moisture boost and renewed shine. Helps shield locks from pollution and other environmental aggressors. Leave-in formula - no need to rinse.
Aqua / Water / Eau, Cetearyl Alcohol, Polysorbate 20, Behentrimonium Chloride, Parfum / Fragrance, Orbignya Oleifera Seed Oil, Cetyl Esters, Amodimethicone, Sodium Benzoate, Isopropyl Alcohol, Citric Acid, Limonene, Tocopherol, Trideceth-6, Chlorhexidine Dihydrochloride, Hexyl Cinnamal, Coumarin, Sodium Hyaluronate, Xylose, Panthenol, Ethylhexyl Salicylate, Aloe Barbadensis Leaf Juice, Cetrimonium Chloride, Linalool, Amyl Cinnamal, Geraniol, Isoeugenol, Alpha-Isomethyl Ionone, Hydroxycitronellal, Benzyl Benzoate, Cinnamyl Alcohol, Citronellol, Benzyl Alcohol, Potassium Sorbate
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Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
Hair Type
Most Helpful Positive Review
Recommend for dry hair! Best trio for the best hair.
I received this product in exchange for my honest review. The Biolage HydraSource Daily Leave-In Tonic is the final step in my HydraSource hair care trio, and it's the cherry on top. After loving the shampoo and detangling solution, I added this leave-in to my routine and instantly noticed an upgrad...
Most Helpful Critical Review
Good but not for my hair type, application needs improvement
[I received this product in exchange for my honest review] I have thin density 2a medium texture hair that is currently mid-back length. I tried this product a couple of times. For my first time with this product, I used the accompanying shampoo then the accompanying conditioner beforehand. It says ...
1088 results
Truly obsessed
Hair Type Straight Hair
The Leave in Tonic is so wonderful. I have been using all three of the shampoo, Detangling solution, And this product. This one is my favorite out of all of them. Genuinely my hair feels so amazing When I use it. It also smells so so good. These are truly some of my new most favorite product products. [I received this product in exchange for my honest review]

Love it
Hair Type Wavy Hair
[I received this product in exchange for my honest review] This tonic is awesome. It smells great and leaves my hair soft and shiny. My hair is typically very dry and this product helped smooth my dry ends and reduce the frizz.

Fresh and clean
Hair Type Wavy Hair
[I received this product in exchange for my honest review] I really liked it! It left my hair smelling fresh and clean with no icky residue. Hair felt smooth and soft after styling. I could feel the difference! I would definitely buy this brand and set again!
Soft Curls
Hair Type Wavy Hair
[I received this product in exchange for my honest review] My hair usually has a slight wave to it. It can be curly with the right products, but gets dry and frizzy pretty easily throughout the day. This leave-in tonic keeps my hair soft and bouncy and also helps to keep my curls intact
I'd buy it again
Hair Type Wavy Hair
[I received this product in exchange for my honest review] The HydraSource Trio is a solid, salon-worthy system for those with thirsty, coarse, or frizz-prone hair in need of lightweight, touchable hydration. The combination of aloe vera and hyaluronic acid delivers smoothness and gloss while protecting against breakage and flyaways. Just be mindful of how it interacts with your hair texture—fine strands may want to dilute product or pair with more moisturizing alternatives.
