Ranked by evidence tier, then by how many studies we cite. Tap any ingredient for the full breakdown and its sources.
A pure hydrator that holds water in your skin. Makes skin look plumper and smoother almost immediately.
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.
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.
A gentler exfoliator that also hydrates as it works. Good entry point if you have sensitive skin and want to try acids.
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.
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.
Calms irritation and adds light hydration. The classic for sunburned or reactive skin.
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.
A Korean-skincare staple that hydrates, soothes, and helps surface damage recover faster. Especially nice on dehydrated or post-acne skin.
A workhorse hydrator that pulls water into your skin. In nearly every good moisturizer for a reason.
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.
A yeast-based ingredient that brightens skin tone and refines the look of pores. Made famous by SK-II essences.