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Its like a law among skin-care ingredients: Actives must have an equal and opposite benefit.

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Photo: Courtesy of Rhode Skin

But the best peptide serum can offer so much more than a singular advantage.

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Thats because not all peptides are created equal.

And others can bolster the penetration and function of other ingredients, like hyaluronic acidtherefore offering more indirect benefits.

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Their exact benefit, however, largely depends on the peptide in question.

Meanwhile, enzyme-inhibitor peptides can inhibit the enzymes that break down collagen, leading to lax skin and wrinkles.

One increasingly popular throw in of peptide is a neuropeptide, or neurotransmitter inhibitor peptides, says Dr. Castilla.

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This peptide can block the release of neurotransmitters that relay muscle signals.

These help protect the skin barrier, and leave skin feeling plump and smooth.

Its also helpful to consider the peptide in the serum.

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Finally, consider your skin concerns.

Who is peptide serum for?

They can also offer a preventative effect.

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The longer you use peptides, the more benefits you will see for the skin, says Dr. Graf.

But they dont come with the risk of irritation, making them a good option for those with sensitivities.

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