Our sources
Last updated: July 2026
Porio's guidance is grounded only in government health services, national dermatology associations, and peer-reviewed research — paraphrased and linked out, never republished, and never a brand blog or retailer with something to sell.
- Your scan is your own. The analysis comes from your photo, not these pages.
- Guidance is paraphrased from here. Ingredient and category advice is grounded in these sources; the AI is instructed never to go beyond them.
- No commercial sources, ever.No brand blogs, no retailers, nothing with something to sell. That's the point.
Skincare basics
General AU guidance on common skin and hair conditions, backing routine basics.
Plain-language primer on how skin works, used for beginner-friendly routine copy.
Baseline cleansing, moisturising and SPF order of operations.
How routines should shift with age, used for aging-track guidance.
NIH overview of skin conditions, used to flag when something is outside cosmetic scope.
Sun protection
Daily SPF guidance and reapplication cadence for AU conditions.
AU sun-protection program guidance, used for SPF habit-building copy.
AU regulatory guidance on sunscreen formulation and labelling.
AU UV-index guidance, used for sun-exposure timing advice.
US regulatory guidance on sunscreen use, backing SPF recommendations.
Global UV radiation health guidance, backing sun-protection basics.
Acne
UK clinical overview of acne causes and treatment options.
Patient-facing acne guidance from UK dermatologists, used for what-to-avoid framing.
Practical acne treatment guidance, used for realistic timelines and expectations.
UK clinical guideline for acne management, keeps treatment advice conservative.
US dermatology resource on acne, used for ingredient and category guidance.
Clinical guideline for acne care, grounds exfoliant and treatment cadence.
NIH overview of acne causes and care, used for basics-level guidance.
Clinical reference on topical retinoids, used for treatment how-to-use guidance.
Peer-reviewed review of azelaic acid for pigmentation and redness in acne.
Aging & actives
How routines should shift with age, used for aging-track guidance.
Clinical reference on topical retinoids, used for treatment how-to-use guidance.
US dermatology guidance on preventing premature skin aging.
Accessible review of retinoid evidence, used for aging-track expectations.
Peer-reviewed review of niacinamide for aging and pigmentation, backing serum guidance.
Skin conditions
General AU guidance on common skin and hair conditions, backing routine basics.
NIH overview of skin conditions, used to flag when something is outside cosmetic scope.
Peer-reviewed review of niacinamide for aging and pigmentation, backing serum guidance.
UK clinical overview of rosacea, used to flag redness that may need a dermatologist.
UK clinical overview of eczema, backing moisturiser and barrier-support guidance.
Clinical skin-condition reference, used to ground exfoliant guidance and condition flags.
UK dermatology patient leaflets, used for condition-specific care basics.
NIH overview of rosacea, backing redness guidance.
NIH overview of atopic dermatitis, used for barrier-support guidance.
Peer-reviewed review of azelaic acid for pigmentation and redness in acne.