Nutrafol’s New Strand Serum Fights Frizz, Damage & Split Ends for Strong, Healthy Hair (Even in Winter)

The innovative formula uses a DualFusion Complex, which works in two ways: Milk thistle seed extract helps fortify the hair cortex, while a nourishing blend of wild olive extract, rosehip fruit extract, and sugarcane-derived hemisqualane smooths and seals the outer cuticle, to calm flyaways and restore health. That combination is especially useful for winter hair when dryness and split-ends not only look dull and dry, but are also delicate and risk breakage. This one product fights against it all, and for less than $60, no less. 

The single-step couldn’t be easier to work into your hair regime: Shake well, start with 2–3 drops in your hand, adding more as needed. Apply to damp or dry hair, focusing on mid-lengths to ends, and style as usual.