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Glow Guides

Guides for skin, hair and body

Plain-language guides to the skin, hair and body care questions people search for most. Each guide shows whether our dermatologist has reviewed it yet.

Featured guides

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87 articles
Body

Laser hair removal: how it works, sessions and who it suits

How laser hair removal works, which laser suits your skin tone, how many sessions you need, how to prepare, side effects, and how it compares with home IPL.

7 min read
Hair

Hair loss in women: causes, blood tests and treatments

The main types of hair loss in women, the blood tests worth asking about, and the treatments with real evidence, from minoxidil to fixing low iron levels.

8 min read
Skin

How to get rid of dark spots and hyperpigmentation

How to get rid of dark spots: the three main kinds, ingredients that fade each one, how long it takes, why sunscreen comes first, and when to see a doctor.

7 min read
Skin

Eczema treatment: calm a flare and rebuild your skin barrier

Eczema treatment explained: the daily moisturizing routine that helps prevent flares, which creams and medicines help, and the warning signs that need a doctor.

7 min read
Skin

Collagen supplements for skin: what the studies actually show

Do collagen supplements improve skin? What clinical trials show, the amounts studied, marine vs. bovine, safety, and how they compare with sunscreen.

7 min read
Hair

Shower filters and hard water: do they help hair and skin?

Do shower filters work? What hard water and chlorine do to hair and skin, what filters can and cannot remove, and simpler fixes like chelating shampoo.

7 min read
Skin

How to get rid of blackheads (and why pore strips never fix them)

How to get rid of blackheads: why they form, how to tell them from sebaceous filaments, the ingredients that clear them, and habits that bring them back.

7 min read
Hair

How to get rid of dandruff: what works and how to use it

What causes dandruff, which anti-dandruff shampoo ingredients help, how to use them for straight, curly and coily hair, and when flakes are something else.

7 min read
Skin

Azelaic acid: what it does, how to use it, what to expect

What azelaic acid does for breakouts, redness and dark marks, which strengths exist, how to start, what to pair it with, and when to see a dermatologist.

8 min read
Skin

Anti-wrinkle products: what is proven and what is marketing

Anti-wrinkle ingredients ranked by evidence: sunscreen, retinoids, vitamin C, acids, peptides, what is mostly marketing, and when clinic treatments make sense.

8 min read
Skin

Rejuran and PDRN "salmon DNA": injections vs serums explained

What PDRN and Rejuran are, how "salmon DNA" injections differ from PDRN serums, what the evidence shows, side effects, costs in general and who should avoid it.

7 min read
Hair

Rosemary oil for hair growth: what the research really says

The small trial behind the rosemary oil trend, what it showed and didn't, how to use rosemary oil safely on your scalp, and how it compares with minoxidil.

7 min read
Skin

Retinol for beginners: how to start without peeling

What retinol does, which strength to start with, a week-by-week plan to avoid peeling, what not to mix with it, and when to move up to retinal or tretinoin.

7 min read
Skin

Skincare routine order: morning and night, step by step

The right skincare routine order for morning and night: what goes first, where actives and sunscreen fit, and a simple weekly plan for retinoids and acids.

7 min read
Skin

How to get rid of dark circles: 3 types and what helps each

Learn the three types of dark circles, a simple stretch test to tell them apart, what may help each type, concealer tips, and when to see a doctor.

8 min read
Skin

Best sunscreen: how to choose one and how much to use

How to choose the best sunscreen: what SPF and broad spectrum mean, mineral vs chemical filters, how much to apply, when to reapply, and which texture suits you.

7 min read
Skin

Niacinamide: benefits, best strength and what to pair it with

What niacinamide (vitamin B3) does for oil, redness, pores and dark spots, which strength to choose, what it pairs with, and the vitamin C myth explained.

7 min read
Body

Stretch marks: how to prevent, fade and treat them

Why stretch marks form, what the evidence says about preventing them, which creams may help new red marks, and what clinic treatments can do for old ones.

7 min read
Body

Cellulite: why it happens and what actually helps

What cellulite is, why most women have it at every weight, which creams and clinic treatments have some evidence, which do not, and when to see a doctor.

6 min read
Skin

Astaxanthin for skin: what the research shows

What astaxanthin is, what small trials show for skin moisture, elasticity and sun damage, supplement versus serum, safety questions and why sunscreen comes first.

6 min read
Skin

Medical spa treatments explained: what each one can really do

Medical spa treatments explained by goal: what injections, fillers, microneedling, peels and lasers can do, downtime, and how to choose a safe clinic.

7 min read
Hair

How to grow hair faster: what really helps and what is a myth

How fast hair really grows, why slow growth is often breakage, the habits that help you keep length, and the myths about trims, inversion and biotin.

6 min read
Skin

LED face masks: do they work and which color do you need?

Do LED face masks work? Which light colors have evidence (red, near-infrared, blue), how to choose and use a mask, eye safety, and who should avoid one.

6 min read
Hair

Minoxidil for women: how to start and what to expect

Minoxidil for women explained: 2% vs 5%, foam vs solution vs low-dose tablets, how to apply it, the early shedding phase, side effects and when it works.

6 min read
Skin

GHK-Cu copper peptides: what the "blue serum" can really do

What the GHK-Cu copper peptide is, what small studies show for firmness and fine lines, how to use the blue serum, what to keep apart, and why not to inject it.

6 min read
Skin

Hypochlorous acid spray: what it does for skin and how to use it

What hypochlorous acid is, how the spray may help breakouts, irritated skin and eyelid hygiene, how to use it, how it differs from bleach, and its limits.

6 min read
Skin

Glycolic acid: benefits, strengths and how to use it safely

What glycolic acid does for dull skin, texture, fine lines and dark spots, the right strength for home use, what not to mix, and who needs a milder acid.

6 min read
Body

Scar tape and silicone sheets: do they work and how to use them

How silicone scar sheets and scar tape work, which scars they help and which they don't, when to start, how long to wear them, and when a scar needs a doctor.

6 min read
Body

Body acne: how to clear back and chest breakouts

Why back and chest acne happens, a shower routine that helps clear it, how to tell it from fungal acne, habits that help, and when to see a dermatologist.

6 min read
Body

Strawberry legs and keratosis pilaris: how to smooth bumpy skin

What causes strawberry legs and bumpy arms, how to tell the types apart, the lotions and shaving habits that smooth them, and when bumps need a doctor.

6 min read
Body

Dark underarms and inner thighs: causes and gentle fixes

Why underarms and inner thighs darken, the signs that point to a medical cause, gentle ingredients that may even tone, and habits that help stop it coming back.

6 min read
Skin

Tranexamic acid for melasma and dark spots: what to know

What tranexamic acid does for melasma and dark spots, how skincare, clinic and prescription pill options differ, who should avoid the pills, and how long it takes.

6 min read
Skin

Eye patches: what under-eye patches can and cannot do

What hydrogel, caffeine and microneedle eye patches really do for puffiness, fine lines and dark circles, how to use them safely, and what they can't fix.

7 min read
Skin

Skin analysis at home: simple tests to read your own skin

Simple at-home tests to find your skin type, spot dehydration and sensitivity, what AI skin-analysis apps get right and wrong, and how to track changes.

6 min read
Skin

Rosacea: the four types and how to calm each one

The four types of rosacea, common triggers, a gentle routine that helps, the prescription treatments dermatologists use, and when eye symptoms need a doctor.

6 min read
Skin

Melasma: why it keeps coming back and how to keep it away

What triggers melasma, why it comes back, the daily sun protection it needs, the creams and prescriptions that fade it, and which procedures carry risks.

6 min read
Skin

How to shrink pores: what really works and what is a myth

Pores cannot open or close, but you can make them look smaller. See what causes large pores, which ingredients and treatments help, and which tricks are myths.

6 min read
Skin

Oily skin routine: control shine without stripping your skin

Why skin gets oily, a simple morning and evening oily skin routine, ingredients that help control shine, mistakes that make it worse, and when to see a doctor.

6 min read
Body

Whole body deodorant: does it work and is it safe?

Why body odor happens, how whole body deodorants differ from antiperspirants, where to use them, whether aluminum is a worry, and when to see a doctor.

6 min read
Body

Razor bumps and ingrown hairs: how to prevent and treat them

Why razor bumps and ingrown hairs happen on legs, underarms and the bikini line, shaving steps that prevent them, ways to calm them, and when to see a doctor.

7 min read
Body

Dry skin on the body: shower rules and the best moisturizers

Why body skin gets dry and itchy, the shower habits and moisturizer timing that help, which ingredients to look for, and when dry, itchy skin needs a doctor.

6 min read
Skin

Vitamin C serum: which form, which strength, how to store it

Which forms of vitamin C work in a serum, what strength to look for, how to tell when it has gone off, what to pair it with, and how to use it under sunscreen.

6 min read
Skin

Hyaluronic acid: how to use it so it hydrates and does not dry

What hyaluronic acid does for skin, why it can feel tight, how to apply it on damp skin and seal it in, molecular weights explained, fillers and supplements.

6 min read
Skin

Salicylic acid: the pore-clearing BHA, explained simply

What salicylic acid (BHA) does for blackheads, breakouts, oily skin, dandruff and bumpy arms, which strength to choose, how to use it, what to avoid mixing.

7 min read
Skin

Tretinoin vs retinol vs adapalene: which retinoid is for you?

Tretinoin vs retinol vs adapalene: how these retinoids differ in strength, irritation and availability, which suits breakouts or fine lines, and how to start.

6 min read
Skin

Skin barrier repair: signs it is damaged and how to fix it

Skin barrier repair made simple: signs your barrier is damaged, common causes, a gentle reset routine, the ingredients that help, and when to see a doctor.

6 min read
Hair

Hair porosity: how to test it and care for low or high porosity

What hair porosity means, why the float test can mislead, simple clues to find yours, and routines and products for low, medium and high porosity hair.

6 min read
Hair

Curly hair routine: wash day, styling, drying and refresh

A simple curly hair routine: wash day, detangling, styling, drying and day-two refresh, with tips for wavy, curly and coily hair and the Curly Girl Method.

6 min read
Hair

Frizzy hair: why it happens and how to tame it

Why hair gets frizzy in humidity or after damage, an easy anti-frizz routine, the ingredients that help, and what to know about salon smoothing treatments.

6 min read
Hair

Split ends and breakage: what helps and what is a myth

Why split ends and breakage happen, why no product can truly repair them, the stretch test, and simple habits and products that help keep hair longer.

6 min read
Hair

Castor oil for hair, brows and lashes: real or hype?

Can castor oil grow hair, brows or lashes? What the evidence says, how to use it safely, risks like eye irritation and hair felting, and proven options.

6 min read
Hair

Rice water for hair: how to use it without protein overload

What rice water can and can't do for hair, how to make and use a rinse safely, why it leaves some hair stiff or dry, and how often to use it.

6 min read
Hair

Grey hair: why it happens early and can it be reversed?

Why hair turns grey, what counts as premature greying, health causes worth checking, whether stress greying can reverse, and how to color or care for grey hair.

6 min read
Hair

Postpartum hair loss: when it starts, peaks and stops

Why hair sheds after birth, when postpartum hair loss starts, peaks and ends, what helps in the meantime, which tests to ask about, and when to see a doctor.

6 min read
Body

Chapped lips: how to heal dry, cracked lips and what to avoid

Why lips get chapped, the simple balm routine dermatologists suggest, the ingredients that make dry lips worse, and when cracks or a scaly patch need a doctor.

7 min read
Body

Cracked heels: the urea routine that softens rough feet

Why heels crack, the urea cream and petroleum jelly routine dermatologists suggest, safe filing, shoe tips, and why people with diabetes need extra care.

6 min read
Body

Sunburn relief: what to do in the first 48 hours

Sunburn relief that works: how to cool and soothe burned skin, what to avoid, how to handle blisters and peeling, and the warning signs that need medical care.

6 min read
Skin

Peptides for skin: which ones have real evidence

Peptides for skin explained: the main types, which have evidence for fine lines and firmness, how they compare with retinoids, and how to add them to a routine.

5 min read
Skin

Glass skin: how to get the Korean glow, realistically

What glass skin really is, the hydration-first routine behind the glow, the ingredients that help, makeup tricks for the look, and realistic expectations.

5 min read
Skin

Exosome serum: what it is, what the evidence shows, and the risks

What exosomes are, where skincare exosomes come from, what early studies show, why the FDA warns about unapproved exosome products, and how to judge a serum.

6 min read
Skin

Beef tallow skincare: does the moisturizer trend work?

Is beef tallow good for skin? What it is, why it went viral, what experts say, risks like clogged pores and spoiling, and better-studied moisturizer choices.

6 min read
Skin

Hydrocolloid patches: which pimples they help and how to use

Which pimples hydrocolloid patches help, how to use them step by step, how plain, medicated and microneedle patches differ, and when a patch is not enough.

6 min read
Skin

Kids skincare: what is safe and what to skip at ages 8 to 14

What kids and tweens really need for their skin, which trendy products to skip and why, a simple routine for the start of puberty and acne, and when to see a doctor.

6 min read
Skin

Pregnancy-safe skincare: what to stop, what to keep

Which skincare ingredients to stop in pregnancy and breastfeeding, which to ask about first, what is usually fine, and how to handle acne, melasma and itching.

5 min read
Skin

Kojic acid: how it works, soap vs serum, and safe use

What kojic acid does for dark spots, soap vs serum, the 1% limit in EU cosmetics, irritation and allergy risks, and how to avoid unsafe lightening products.

6 min read
Skin

Mandelic acid: the gentle AHA for sensitive skin and dark marks

Mandelic acid explained: why this AHA is gentler than glycolic acid, who it suits, how to use it for texture, breakouts and dark marks, and what not to mix.

5 min read
Skin

Fungal acne: how to tell it apart from acne and what helps

Fungal acne (Malassezia folliculitis) explained: how it differs from acne, common triggers, antifungal washes, products to rethink, and when to see a doctor.

5 min read
Skin

Skin cycling and slugging: do these routines work?

Skin cycling and slugging explained: the 4-night routine, who it helps, how to slug with petroleum jelly safely, and who should skip each trend.

5 min read
Skin

Perioral dermatitis: causes and care for a rash around the mouth

Perioral dermatitis explained: what the rash around the mouth looks like, triggers like steroid creams, "zero therapy", treatments, and why it flares first.

5 min read
Skin

Milia: why tiny white bumps appear and why not to squeeze them

Milia explained: what the tiny white bumps under the eyes are, why they form, why squeezing fails, home care, safe removal by a dermatologist, and prevention.

5 min read
Skin

Sea buckthorn oil for skin: benefits, berry vs seed, how to use

Sea buckthorn oil for skin: what is in it, berry vs seed oil, what it may do for dry and dull skin, how to use it without staining, and who should be careful.

5 min read
Hair

Scalp care and scalp oiling: a simple routine for a healthy scalp

Scalp care made simple: how often to wash, gentle exfoliation, scalp serums, how to oil your scalp safely, when to skip oil, and signs you should see a doctor.

5 min read
Hair

Batana oil for hair: what it can do, and the hair-growth claims

Batana oil for hair: where it comes from, what it can do for dry, coarse hair, why there is no proof it regrows hair, how to use it, and who should be careful.

5 min read
Hair

Bond builder for hair: how it works and what it can and can't fix

What hair bonds are, how bleach, relaxers and heat weaken them, how bond builders work, salon versus home use, and how they differ from protein.

6 min read
Hair

Heat protectant: how it works and how to use it

How heat protectant works, how to apply it before blow-drying and flat irons, how to lower heat damage with smart settings, and when to see a doctor.

6 min read
Hair

Oily scalp: how often to wash and what actually helps

Why some scalps get greasy fast, whether washing more or less matters, how often to wash, which shampoos and ingredients help, and when it is not only oil.

6 min read
Hair

Dry shampoo: how to use it without hurting your scalp

How dry shampoo works, how to apply it, how often is too often, what the benzene recalls meant, and tips for dark hair, curls and sensitive scalps.

6 min read
Hair

Protein vs moisture: the balance your hair needs

How to tell if your hair needs protein or moisture, signs of protein overload, how to read ingredient lists, and a simple routine to keep hair soft and strong.

5 min read
Hair

Itchy scalp: common causes and what helps each one

The most common causes of an itchy scalp, from dandruff and dry scalp to product allergies, psoriasis and lice, how to tell them apart, and what to do for each.

5 min read
Hair

Clarifying shampoo: when to use it and how chelating differs

What clarifying and chelating shampoos do, how they differ, signs your hair needs a reset, how often to use them, and how to protect colored, curly and dry hair.

5 min read
Hair

Henna and hair dye: what is safe to mix and what is not

Pure henna vs compound and "black henna", why henna and chemical dye or bleach can clash, the strand and skin tests to do first, and how to switch between them.

6 min read
Hair

Traction alopecia: tight styles, scarves and your hairline

How tight braids, weaves, ponytails and headscarves cause traction alopecia, the early signs, how to protect your hairline, and what may help regrowth.

6 min read
Body

Body wash: how to choose the right one for your skin

Soap, syndet bars, gels, creams or shower oil? How to pick a body wash for dry, sensitive, bumpy or breakout-prone skin, and how to wash without drying it out.

6 min read
Body

Retinol body lotion: does it help body dark spots?

What retinol body lotion may do for rough texture and dark marks on the body, how to start, what else helps body hyperpigmentation, and when to see a doctor.

6 min read
Body

Body exfoliation: scrubs vs acids and how often to do it

Scrubs vs acids for body exfoliation: which suits rough skin, bumps, ingrown hairs and self-tan prep, how to do it gently, how often, and mistakes to avoid.

5 min read
Body

Chafing: how to prevent and soothe thigh and underarm rub

Why chafing happens on thighs, underarms and under the breasts, which balms, powders and clothes help prevent it, how to soothe sore skin, and signs of infection.

6 min read
Body

Self tanner: how to apply it streak-free on every skin tone

How self tanner works, how to prep and apply it for a streak-free result, choosing a shade, fixing mistakes, spray tan safety, and why you still need sunscreen.

6 min read