Hydrating.

Top picks (Strong tier)

• Om

  Colloidal Oatmeal

  Barrier repair · Anti-inflammatory · Hydrating

  An FDA-recognised skin protectant that helps soothe the feeling of itch, redness, and dryness on irritated skin. FDA recognised it as a Category I skin protectant in 2003, and 1% creams showed improvement over their base formula for dry, irritation-prone skin in controlled trials.

• Dm

  Dimethicone

  Barrier repair · Hydrating

  A silicone that sits on your skin as an invisible, non-greasy shield. Reduces water loss, protects against irritants (think soap, friction, incontinence), and is FDA-recognised as a skin protectant from 1-30%. The reason your favourite primer feels silky and your barrier cream actually works under makeup.

• HA

  Hyaluronic Acid

  Hydrating

  A pure hydrator that holds water in your skin. Makes skin look plumper and smoother almost immediately.

All hydrating ingredients (34)

• Colloidal OatmealExcellent evidence

  An FDA-recognised skin protectant that helps soothe the feeling of itch, redness, and dryness on irritated skin. FDA recognised it as a Category I skin protectant in 2003, and 1% creams showed improvement over their base formula for dry, irritation-prone skin in controlled trials.

• DimethiconeExcellent evidence

  A silicone that sits on your skin as an invisible, non-greasy shield. Reduces water loss, protects against irritants (think soap, friction, incontinence), and is FDA-recognised as a skin protectant from 1-30%. The reason your favourite primer feels silky and your barrier cream actually works under makeup.

• Hyaluronic AcidExcellent evidence

  A pure hydrator that holds water in your skin. Makes skin look plumper and smoother almost immediately.

• Lactic AcidExcellent evidence

  A gentler exfoliator that also hydrates as it works. Good entry point if you have sensitive skin and want to try acids.

• PetrolatumExcellent evidence

  The gold-standard occlusive moisturiser. Locks water into damaged or compromised skin better than anything else, accelerates barrier repair, and (in newer research) actively boosts your skin's own antimicrobial defences. Cheap, non-allergenic, widely recommended by dermatologists for very dry, compromised, or post-procedure skin and for slugging.

• UreaExcellent evidence

  A small molecule your skin already makes. Low concentrations deeply hydrate dry skin; higher concentrations soften thick, scaly patches. A workhorse for very dry, rough, or flaky skin.

• Aloe VeraGood evidence

  Calms irritation and adds light hydration. The classic for sunburned or reactive skin.

• Argan OilGood evidence

  The Moroccan kitchen-staple oil with real cosmetic data behind it. Daily use measurably improves skin elasticity in postmenopausal women. Good for dry, mature, or barrier-compromised skin without feeling greasy.

• BeeswaxGood evidence

  A wax film former that quietly does what petrolatum does (slows water loss and shields chapped skin) without feeling slick. Most evidence comes from honey/beeswax/olive-oil cerates that have shown improvement in dry, irritation-prone skin in controlled trials. CIR-affirmed safe.

• Beta-GlucanGood evidence

  A heavy-duty hydrator that also reduces irritation. Often called "better than hyaluronic acid" for sensitive skin.

• Camellia OilGood evidence

  A lightweight Japanese plant oil that hydrates and seals in moisture without feeling heavy.

• EctoinGood evidence

  A desert-bacteria-derived molecule that wraps skin cells in a protective water layer. Genuinely helpful for irritated, atopic-prone, or post-procedure skin.

• Galactomyces FermentGood evidence

  A yeast-based ingredient that brightens skin tone and refines the look of pores. Made famous by SK-II essences.

• GlycerinGood evidence

  A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.

• HatomugiGood evidence

  A traditional Japanese botanical (Job's tears) that hydrates and calms irritated skin.

• HoneyGood evidence

  An ancient humectant and antimicrobial ingredient with a long research track record. Its sugar matrix and flavonoids help draw in moisture and support skin comfort; formulas pairing honey with beeswax and olive oil have shown improvement in dry, irritation-prone skin in controlled trials.

• Hydrolyzed CollagenGood evidence

  The protein your skin loses with age, broken down small enough to absorb. Multiple meta-analyses of RCTs show measurable wins in wrinkles, elasticity, and hydration after about 12 weeks. Most evidence is oral, but topical helps surface hydration too.

• Jojoba OilGood evidence

  Technically a wax that masquerades as oil, molecularly closer to your own sebum than any other plant oil. Hydrates without clogging pores, calms inflammation, and plays well in acne-prone and sensitive routines.

• Lactobionic AcidGood evidence

  A "next-gen AHA" that exfoliates and hydrates at the same time, with much less stinging than glycolic. Sensitive-skin or rosacea-prone users tolerate it where stronger acids fail.

• LanolinGood evidence

  Sheep-derived wax esters that mirror the molecules in your own skin lipids. Deeply conditions and softens dry, chapped skin like rough hands and damaged lips, with multiple positive RCTs behind it. Note: classic but real allergen, so patch-test if you have a wool/Balsam-of-Peru history.

• N-AcetylglucosamineGood evidence

  A gentle brightener that fades dark spots while quietly boosting hydration. Pairs especially well with niacinamide.

• PanthenolGood evidence

  Pro-vitamin B5. Deeply hydrates and helps repair the skin barrier, calming dry or compromised skin.

• PHAGood evidence

  The mildest exfoliating acid. Refines texture and hydrates at the same time, and it's sensitive-skin friendly.

• PiteraGood evidence

  SK-II's signature ingredient, a specific yeast filtrate that improves clarity and texture over time.

• Shea ButterGood evidence

  A rich, naturally occlusive plant butter from the African karite tree. Soothes dry, irritation-prone skin, refills the lipid barrier, and was well tolerated enough in randomized trials that most participants used it comfortably as a daily emollient.

• Snail MucinGood evidence

  A Korean-skincare staple that hydrates, soothes, and helps surface damage recover faster. Especially nice on dehydrated or post-acne skin.

• AllantoinFair evidence

  A gentle smoother and skin-soother. Reduces flakiness and helps the surface look more even.

• Lactobacillus FermentFair evidence

  A "postbiotic" (dead probiotic bits) that talks to your skin microbiome without adding live bugs. Patches up a leaky barrier and is friendly even on very reactive skin.

• Polyglutamic AcidFair evidence

  A hydrator often pitched as "stronger than hyaluronic acid." It sits on the surface, locks water in, and helps your skin make more of its own moisturizers over time.

• Rice Ferment FiltrateFair evidence

  The rice-water glow trend behind viral rice toners and essences. Lab and animal studies point to brightening and hydration, but human studies are still thin. Think of it as a pleasant, low-risk hydrator with promising early evidence rather than a proven brightener.

• Snow MushroomFair evidence

  Often pitched as the gentler cousin of hyaluronic acid. It holds water in the skin, fades less quickly in dry air, and quietly buffers against UV oxidative stress.

• Sodium PCAFair evidence

  Replenishes one of the actual humectant molecules your own skin makes. Levels drop in eczema and with age, so topping it up genuinely helps dry, dehydrated, or atopic-prone skin feel less tight.

• SqualaneFair evidence

  A lightweight oil that mimics what your skin already makes. Softens and seals in hydration without feeling greasy.

• Yam Root ExtractFair evidence

  The ultimate vegan alternative to snail mucin. It provides the same deeply hydrating, stretchy texture but is derived entirely from wild yam roots. Very soothing for sensitive skin.