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BiolageHydra Source Daily Leave-In Tonic

Leave-in treatment

#4 in Hair Tonic on Amazon

$38

or save up to 5% more with Subscribe & Save on Amazon

Size 399 ml, $2.82 / fl oz

Sold by Amazon.com. Amazon's shipping and returns apply. Who sells Biolage on Amazon

Amazon price as of Oct 5, 2026, 2:00 AM ET, subject to change: the price on Amazon at checkout is the one that applies. We may earn a commission; the price you pay is the same.

Garnier Fructis Sleek & Shine Leave-In Conditioner Cream
7 cheaper on the same shelf, from $0.46 / fl oz. See them

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About the Product

What it is: Leave-in treatment, 399 ml. Daily leave-in tonic. A lightweight, hydrating leave-in spray that effectively detangles and tames flyaways for healthy-looking hair.

What Else You Need to Know:

  • Benefits: Infused and micro-dosed with micro-filtered aloe vera and fermented hyaluronic acid, this tonic provides intense hydration, leaving hair feeling incredibly soft.
  • Additional benefits: Conditions, detangles, renews shine, and optimizes moisture balance for 6x more hydration* and an 85% reduction in frizz.**
  • Suggested use: Mist lightly on damp hair and comb through. Do not rinse.

From the Amazon listing.

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Cheaper on the Same Shelf

Leave-in treatment, for less per ounce on Amazon

$38

$2.82 / fl oz