

When skin looks dull, the first instinct is often to add another serum, while the cause is usually a layer of dead cells, dehydration or a run of short nights. Once you know which one is behind it, a few small, steady changes bring the glow back.
The short answer
How to use it
Last reviewed
What each one does, how it works and how to use it.

Enzymes dissolve the bonds holding dead cells to your skin and then stop, which makes them the gentlest exfoliant there is. Here is how they work and who they suit.
Read about it
Lactic acid exfoliates and hydrates at the same time, which makes it the AHA for dry and easily irritated skin. Here is how it compares to glycolic and how to use it.
Read about it
Glycolic acid is the smallest exfoliating acid, so it reaches deepest and does the most for texture, tone and fine lines. Here is how to use it without overdoing it.
Read about it
Mandelic acid exfoliates, slows pigment production and reduces acne bacteria all at once, which makes it the acid for post-breakout marks and deeper skin tones.
Read about it
Vitamin C intercepts the daily damage from sun and pollution, fades dark patches and is required for your skin to build collagen. Here is how it works and which form suits your skin.
Read about it
Niacinamide calms redness, strengthens the barrier, evens pigment and regulates oil, all without irritation. Here is why four to five percent is the number and how it fits with everything else.
Read about it
Glutathione is the antioxidant your own cells make. What it does about everyday damage and uneven tone, and how to choose a product that still works when you open it.
Read about it
Hyaluronic acid holds a thousand times its weight in water and plumps skin the same day. Here is how to apply it so it works, and why it sometimes backfires.
Read about it
A carboxy gel mask uses carbon dioxide to make your own blood deliver oxygen to the skin, so you get visible plumpness and glow within the hour. Here is how it works and when to use it.
Read about it
Gently exfoliates and smooths rough skin for a softer, healthier-looking glow.

Hydrating toner that refreshes skin while restoring pH balance.

Hydrating toner that replenishes moisture, softens the skin, and supports a healthy skin barrier.

Rich cream that smooths texture, boosts firmness, and hydrates deeply for multiple aging concerns.

Adaptogen-powered serum that restores balance and improves redness, dullness, and uneven tone.

Clinically tested on menopausal skin to restore hydration, firmness, and luminosity.

Topical complement to injectables + refines pores & smooths texture.

A silky, acne-safe cleansing oil that melts away makeup and impurities while supporting the barrier.

Enzyme body exfoliant that smooths rough texture and leaves skin soft and radiant.

Creamy anti-aging cleanser that hydrates, smooths, and supports skin firmness while cleansing.

A gentle exfoliating scrub with micro-crystals and peptides that polish texture and boost skin firmness.

Non-comedogenic cleansing oil with salicylic acid for congested skin.

Concentrated stem cell serum with PTT-6® that renews skin, boosts firmness, and improves radiance.

A barrier-supporting serum that replenishes the fats in your barrier and hydrates deeply.

Antioxidant serum for blotchy, dull, or aging skin, and a good first serum from your twenties.

Nourishing SPF 60 body and face oil that protects without a white cast.

Hydrates deeply, preps skin, calms and brightens.

Gentle vitamin C serum for reactive skin that helps dullness, uneven tone, redness, and aging.

8% mandelic acid serum that resurfaces, brightens, and clears sensitive and acne-prone skin.

Sensitive-skin-friendly serum for texture, acne, and signs of aging.

A post-procedure kit designed to accelerate repair, soothe sensitized skin, and restore hydration gently.

Overnight gel mask that reduces redness, repairs damage, and supports collagen renewal while you sleep.

True Tone 2.0 and Rejuv Rx paired in Vivant's Post-Inflammatory Erythema Protocol for visible reduction in redness, PIE, and uneven tone in as little as 14 days.

Exfoliates, smooths texture, calms sensitive skin.
Blackheads and Whiteheads: What Clogs a Pore and How to Clear It
Blackheads and whiteheads are clogged pores that have not turned red or sore. Here is what forms the plug, why many nose blackheads are something else, and how to clear them.
Read moreabout Blackheads and Whiteheads: What Clogs a Pore and How to Clear It
Dark Circles: What Causes Them and What Skincare Can Change
Dark circles come from extra pigment, blood vessels showing through thin skin, or shadow from a hollow under the eye. Here is how to tell which you have and what skincare can change.
Read moreabout Dark Circles: What Causes Them and What Skincare Can Change
Glycation: How Sugar Stiffens Skin and What Can Slow It
Glycation is sugar bonding to the collagen in your skin, leaving it stiffer and more yellow over the years. Here is how it happens, what speeds it up and what can slow it down.
Read moreabout Glycation: How Sugar Stiffens Skin and What Can Slow It