5 Ingredients That'll Change Your Hair Overnight

THE SCIENCE: This blend of ingredients helps reinforce hair's natural protein-based structure.

SCIENCE, DECODED: They make hair stronger, healthier, and shinier. "Over time, hair becomes damaged from styling and chemical processes—and because it's unable to repair itself, you need to strengthen its protein structure from the outside in," explains Diane Minar, senior scientist with Nexxus New York Salon Care.

Try: Nexxus Encapsulate Serum

THE SCIENCE: "This natural hydrator penetrates the hair shaft to soften and moisturize strands," says Kevin Mancuso, creative director at Nexxus New York Salon Care.

SCIENCE, DECODED: Glycerin gives life back to your blowout. "Adding hydrating glycerin lets hair regain flexibility and shine, plus styling becomes easier because strands are no longer static from dehydration," says Mancuso.

Try: Nexxus Youth Renewal Elixir

THE SCIENCE: Because lack of moisture can cause strands to get thinner, panthenol "helps strands retain water, increasing their actual diameter," explains Minar.

SCIENCE, DECODED: Panthenol plumps up super thin strands and boosts the thickness of your ponytail.

Try: Nexxus Diametress Headress Leave In Conditioning Créme

THE SCIENCE: These long-chain molecules condition hair and act as a sealant on strands. And some polymers can have different electric charges that help them coat hair.

SCIENCE, DECODED: "When applied directly on ends, a polymer complex containing both positive and negative charges can adhere to the hair and help mend split ends," explains Minar. Leave-in treatments laced with them can help you fake a fresh cut and stop split ends from ruining strands.

Try: Nexxus Promend Binding Leave In Créme

THE SCIENCE: "Botanical oils—including marula, babassu, Brazilian buriti, sweet almond, macadamia nut, and sunflower—have a small molecular weight, allowing them to penetrate hair's outer layer," says Minar.

SCIENCE, DECODED: They infuse moisture back to each and every strand—especially coarse and curly textures—helping to smooth frizz and give hair natural shine.

Try: Nexxus Oil Infinite Nourishing Hair Oil