Kérastase Nutritive Split Ends Hair Serum dupe

BioSilk Silk Therapy Original Leave-In Treatment

−92%per oz

Kérastase · $51BioSilk · $13.20 $38

Kérastase Nutritive Split Ends Hair Serum against BioSilk Silk Therapy Original Leave-In Treatment
Fact	Kérastase	BioSilk
Type	Hair serum	Hair oil
Size	50 ml	167 ml
Per ounce	$30.16 / fl oz	$2.34 / fl oz
Amazon rank	#170 in Hair Treatment Oils	#27 in Hair Treatment Masks
Sold by	Kérastase	Amazon.com

The trade-off

Kérastase adds vitamin E, corn germ oil and glyceryl linoleate for a softer, more nourished feel; BioSilk adds denatured alcohol, panthenol and a silk protein.

Nutritive Split Ends Hair Serum costs about $51 for 50 ml ($30.16 / fl oz). The dupe below is BioSilk Silk Therapy Original Leave-In Treatment at $13.20 $38, about 92% less per ounce. Each pair is compared on format, finish and key ingredients, including what the dupe doesn't do.

Hair serum, 50 ml. Split ends serum. Deeply nourishing hair oil reduces split ends and adds deep nutrition to dry hair to instantly smooth and add shine. Prevents future damage and reduces split ends for stronger, hydrated and nourished hair with a radiant shiny finish.

Amazon prices as of Oct 5, 2026, 10:04 AM ET, subject to change: the price on Amazon at checkout is the one that applies.

65% off#27 in Hair Treatment Masks on Amazon

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The dupe, side by side

The original

Kérastase

Nutritive Split Ends Hair Serum

$51

$30.16 / fl oz

The dupe

BioSilk

Silk Therapy Original Leave-In Treatment

$13.20 $38

$2.34 / fl oz

Cost per fl oz

Original$30.16 / fl oz

Dupe$2.34 / fl oz

$37.80 less at checkout than the original.

What matches

Built alike: a water-free serum whose carrier evaporates, isododecane in both (with C13-14 isoparaffin in BioSilk), leaving a silicone film that seals dry ends, dimethicone and dimethiconol in Kérastase, dimethiconol in BioSilk.

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Sold as Nutritive Split Ends Hair Serum dupes, and left out

Matrix Food For Soft Hair Oil. The closest list (isododecane, dimethicone, dimethiconol), but $23 an ounce in the 1 oz bottle and $20 in the 1.7 oz against Kérastase's $30.Under 40% per ounce · checked 5 October 2026

What a dupe has to clear, and everything we turned down

Questions

What is the best dupe for Kérastase Nutritive Split Ends Hair Serum?

BioSilk Silk Therapy Original Leave-In Treatment at about $13.20. Built alike: a water-free serum whose carrier evaporates, isododecane in both (with C13-14 isoparaffin in BioSilk), leaving a silicone film that seals dry ends, dimethicone and dimethiconol in Kérastase, dimethiconol in BioSilk.

How much cheaper is BioSilk Silk Therapy Original Leave-In Treatment than Nutritive Split Ends Hair Serum?

Nutritive Split Ends Hair Serum costs about $51 for 50 ml, or $30.16 / fl oz. BioSilk Silk Therapy Original Leave-In Treatment works out at $2.34 / fl oz, roughly 92% less per ounce.

What does BioSilk Silk Therapy Original Leave-In Treatment do worse than Nutritive Split Ends Hair Serum?

Kérastase adds vitamin E, corn germ oil and glyceryl linoleate for a softer, more nourished feel; BioSilk adds denatured alcohol, panthenol and a silk protein.

Is Matrix Food For Soft Hair Oil a dupe for Kérastase Nutritive Split Ends Hair Serum?

Not by our rules. The closest list (isododecane, dimethicone, dimethiconol), but $23 an ounce in the 1 oz bottle and $20 in the 1.7 oz against Kérastase's $30. Checked 5 October 2026.