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Silicone-free is a marketing claim, not a skin benefit. Here is when it is worth choosing, when it is not, and what brands put in instead.

Silicones smooth hair and cut breakage, but some need a proper wash to shift. Here is what they do, who should skip them, and what silicone-free means.

Silicones like dimethicone do not clog pores or suffocate skin. Here is what they really do, what scientists still argue about, and who should skip them.

Niacinamide works at 4 to 5 per cent. Below 2 does little, above 10 often stings. What it does, and why it does not cancel out vitamin C.

Spots leave two kinds of mark and they need different things. Brown is pigment, red is blood vessels, and only one responds to brightening products.

Sunscreen is the main treatment, not a supporting step. Which SPF, why tinted matters for melasma, how much to use, and the spots people miss.

Three different things people mix up. What each one is, how to tell which you have, and the five signs that mean a spot needs a doctor.

Two finger-lengths for face and neck, a shot glass for your body. Most people use a third of that, and using less costs more protection than you think.

Sunscreen does more than any serum. What actually fades dark marks, how long it takes, and why most treatment fails. In plain English.

Melanin gives some protection, well short of enough. Why marks matter more than burning, and how to avoid a white cast.

Indoors, cloudy days, vitamin D, chemical filters, SPF as minutes. Most sunscreen myths have a real fact underneath and a wrong conclusion on top.

Three ingredients, three different jobs. Which one suits your kind of pigmentation, what strength to use, and whether to combine them.

SPF is not minutes, and the percentages mislead. What the number measures, what it misses, and why how much you apply matters more.

Dehydrated skin is short of water, not oil. How to tell, why oily skin gets it, what causes it, and how to fix it in two to four weeks.

Dry skin is short of oil, not water. Why it happens, what makes it worse, and how to manage a skin type you keep for life.

Two numbers decide whether a glycolic acid product works — the percentage and the pH. Most brands print one. Here is how to read both.

A hormonal kind of pigmentation. Why it appears, why heat and daylight set it off, and why it comes back even when you are careful with sunscreen.

Six reasons cover almost every case. Work through them in order — the first two account for most of it.

No, and there is no known mechanism for it. Where the belief comes from, what really happens when you stop, and the one grain of truth worth knowing.

Most people do, but not everyone. A one-day test to find out for yourself, who genuinely needs one, and who is fine without.

Sometimes, but less often than people think. How to tell blocked pores from irritation, and why stopping altogether usually backfires.

Both, depending on the ingredients. All moisturisers mask. Only some contain what your skin needs to repair the barrier itself.

A pea to an almond for your face, and far more than you think for your body. The fingertip unit, when to apply, and how long a tub should last.

Which ingredients pull water in, which smooth your skin, and which keep the water there. A plain-English list of what to look for on a label.

A lotion is a moisturiser. So is a cream, gel, balm and ointment. The only real difference is how much oil is in the mix — and which one suits your skin.

A moisturiser helps your skin hold water. What it does, what's inside it, how to use it, and whether you actually need one — in plain English.

A hydrator adds water to your skin. A moisturiser adds water and holds it in. Which you need, and why a hydrator alone can leave skin tight.

The top layer of your skin, what it is made of, how to tell when it is damaged, and how long it takes to repair. In plain English.

Thinnest first, sunscreen last. The full morning and night order, how long to wait between steps, and which combinations actually clash.

Little balls of product instead of smooth skin. The four causes, how to work out which one is yours, and the fix for each.

Not moisturising — and not noticing any immediate problem — is something many people experience. If your skin feels fine without one, it’s a reasonable que

Everything you need to know about UV index

What are these age and dark spots, and what are they not? Age spots and dark spots are both forms of hyperpigmentation, where certain areas of the skin app

Hydrocolloid, pimple and acne patches - How do they work? Are they helpful? The things to look out for if you shop for them.

Start at 5%, twice a week, at night, on dry skin. Moisturiser after, sunscreen every morning. Most problems come from going too fast.

Tingling and light flaking are normal. Burning, lasting redness and stinging with other products are not. Plus the sun sensitivity people miss.

This post explains in detail what glycolic acid can do for our face.

This post explains if we can use flavoured lip balms? Do they cause any harm?

A detailed comparison of physical and chemical sunscreens.

Anti-Ageing Benefits of bakuchiol | What it can do | Comparing bakuchiol with retinol

This post explains what bakuchiol is and its benefits on skin.

A good oil, and not nature's retinol. What is actually in it, why that claim needs scrutiny, and why it goes off faster than you think.

How can alpha arbutin help fight pigmentation | This post explains in detail everything you need to know about pigmnetation and alpha arbutin.

How can azelaic acid help fight pigmentation | This post explains two different ways it can help address post-inflammatory pigmentation.

A detailed post on all the ways tretinoin can help reduce pigmentation on our face.

A detailed post on all the ways Vitamin C can help reduce pigmentation on our face.

How can Kojic acid help fight pigmentation | This post explains in detail everything you need to know about pigmnetation and kojic acid.

How can Licorice Root Extract help fight pigmentation | This post explains in detail everything you need to know about pigmnetation and Licorice Root Extract.

9 things you need to do to avoid pigmentation | These 9 reasons can make your pigmentation worse.

Four things prevent most pigmentation. Sunscreen, not picking, treating spots properly, and keeping your routine gentle.

Sun and inflammation cause most of it, hormones cause the rest. How to tell which kind you have, why some marks last years, and when to see a doctor.

A little, indirectly, and not how it is usually explained. Plus the fruit-versus-seed mix-up behind half the claims made for it.

It helps, modestly, and not how it is sold. Why the vitamin C and retinol claims do not hold up, and what the oil genuinely does.

One of the better oils for acne-prone skin, and not a treatment. Why linoleic acid matters, and why comedogenic ratings do not.

To fix dark knee problem, we need to fix 3 main problems in that area. Skin care ingredients that can fix these 3 problems are explained.

There are 2 main reasons for dark knees. Understanding these 2 reasons is vital to learning how to fix the dark knee problem.

Two jobs, and most people only buy one. What pulls water in, what keeps it there, and why a serum alone can leave you tighter.

Yes, and it is common. Shiny and tight at the same time is the giveaway. Why it happens, and why the fix is not less oil.

Being short of water does not cause spots directly. It makes almost everything about acne harder, and the routines clash.

It does not add water or oil. It prompts your skin to make more of its own barrier fats, and 4 to 5% is the useful range.

What exactly can Glycolic acid Exfoliating Liquid at 8% concentration do for our skin - Explained in this post.

Four usual causes, and none of them is purging. Niacinamide does not speed up cell turnover, so what looks like a purge is irritation.

Why it is considered unsafe to mix them together - Is it a myth or there is truth to it | This post explains if you can you actually use niacinamide & vitamin c together

Very little, and that is the honest answer. The real mistake is stacking it across several products without noticing.

Why do some niacinamide products produce foam | How to stop it from doing so | Does it mean the product has gone bad

They do different jobs, so there is no single winner. Which to pick, and why the form of vitamin C matters more than the percentage.

White crust on a niacinamide bottle is quite normal. But what is it, what does it mean and what to do...Explained.

For lines and sun damage, no. Retinol has far more evidence. But niacinamide makes retinol easier to stick with, which is the point.

Colloidal oatmeal genuinely soothes itchy skin. Why it works, why porridge oats do not, and how to run the bath properly.

Eight questions, two minutes. Dry skin is short of oil, dehydrated skin is short of water, and the fixes are different.

Snails are not killed for it. Past that, straight answers are hard to find, and cruelty-free claims cannot be checked by anyone.

It hydrates and soothes, and the evidence stops there. Plus the reason the percentage on the bottle tells you almost nothing.

About two hours, and the 50 has nothing to do with it. What actually makes sunscreen wear off, when to go sooner, and how to reapply over makeup.

Underarm shaving - does it make underarms dark and what we can do to reduce underarm darkness

What causes pigmentation in underarm - Pigmentation is underarm darkness

In this post, I take you through 7 different reasons our armpits could be getting dark from shaving...These 7 reasons are easy to fix - and the benefits to underarms is huge.

Shaving can cause darkness in the underarm area. In this post, I share 4 tips on how to prevent this darkness.

Knees take a higher strength than underarms. But much of the darkness is dry, built-up skin, so moisturising matters as much as the acid.

It can lighten dark underarms over 8 to 12 weeks. Twice a week, never after shaving, and why overdoing it makes the darkness worse.

It can reduce smell, and the mechanism is real. But daily acid on underarm skin causes the darkening people are usually also trying to fix.

There are 10 common reasons for dark underarms. In the post, I also explain how we can fix these 10 reasons and avoid dark underarms.

Harmless, and the wrong tool. Lips have no oil glands, so an ingredient that adds water without sealing it can leave them drier.

Reactions are uncommon, and most problems are not the mucin. Dry air, the rest of the formula, and one allergy link that catches people out.

A little, mostly by hydrating skin so it looks less dull. It does not fade dark marks, and the glycolic acid in it is far too weak.