Youth-Boost Peptide Serum vs The Neck Serum - Firming Serum With 7.5% Peptide — Ingredient Comparison

goop

Youth-Boost Peptide Serum

Serum · 45 ingredients

For youthful, healthy-looking skin, this powerful, clinically tested all-in-one Youth-Boost Peptide Serum from goop takes a 360-degree approach to target key signs of aging—firmness, elasticity, wrinkles, hyperpigmentation, texture, radiance, barrier support, and more.

Cruelty-free

Nécessaire

The Neck Serum - Firming Serum With 7.5% Peptide

Serum · 30 ingredients

A firming serum formulated specifically for the thin, delicate skin of the neck, targeting loss of firmness and the appearance of neck lines. A blend of five clinically proven peptides works to support the skin's natural collagen production, while niacinamide (Vitamin B3) helps reinforce the skin's barrier and rosewater helps soothe the neck area. The formula is free from parabens, sulfates, phthalates, and mineral oils.

Vegan

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How these two interact

No conflicts — safe to layer

Both are Serum products.

At a glance

Vegan

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Cruelty-free

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Price

$150

$65

$85 less

Key ingredients

Niacinamide

Strengthens the barrier, controls oil, and fades dark spots — gentle and plays well with almost everything.

Hyaluronic Acid

Holds water in the skin for instant plumping and hydration.

Salicylic Acid

An oil-soluble acid that gets inside pores to clear congestion and calm breakouts.

Ceramides

Barrier lipids that seal in moisture and repair a compromised skin barrier.

Peptides

Amino-acid messengers that signal collagen production for firmer, smoother skin.

Squalane

A lightweight, biomimetic oil that softens without clogging pores — pairs perfectly with strong actives to offset dryness.

Aloe Vera

Cools and hydrates irritated skin.

Vitamin E

An antioxidant that protects the barrier and supercharges vitamin C.

Bifida Ferment

A probiotic ferment lysate that supports the skin barrier and microbiome, calming reactive skin.

Glycerin

The workhorse humectant — simple, effective, and exceptionally well-tolerated.

Salicylic Acid (BHA)

An oil-soluble acid that gets inside pores to clear congestion and calm breakouts.

Gluconolactone (PHA)

A gentle, large-molecule exfoliant that smooths and hydrates — ideal for sensitive skin.

Saccharomyces Ferment

A fermented filtrate that hydrates, brightens, and strengthens the barrier.

Coriandrum Sativum (Coriander) Fruit Oil