Cream, lotion, serum or wash: which one do you need?

Neither word has a regulated definition, and plenty of products carry both on the same carton. By loose convention a face wash is a rinse-off product that foams, and cleanser is the umbrella word covering foaming gels as well as cream cleansers, micellar waters, balms and oils. Every face wash is a cleanser. A cleanser is only sometimes a face wash.

In practice The difference that matters is surfactant strength and format. Gels and foaming liquids sit toward the stronger end more often than not. Cream and lotion cleansers carry emollients that cushion their surfactants. Balms and oils dissolve sunscreen and makeup, then rinse off. Read the after-feel, not the name: a few minutes after rinsing, skin should feel clean and unremarkable.

The Brightening Face Wash is both things at once, a face wash in format and a cleanser in function, and low-foam by design.

True soap is made by reacting fats with an alkali, and it cleans well precisely because it is alkaline. Skin's surface runs mildly acidic, around pH 4.5 to 5.5, and that acidity keeps the barrier's enzymes working. An alkaline wash sends the pH up and takes lipids with it, and twice a day the recovery periods start to overlap. Most modern face washes are synthetic detergents blended to clean near skin's own pH.

In practice Squeaky is stripped, not clean. Occasional soap on a healthy face does no lasting harm. The twice-daily habit is the problem. Syndet bars are detergent cleansers pressed into bar form near skin's pH, so read for the pH claim rather than the shape. Below the neck, if soap suits you, keep it.

The Brightening Face Wash is the detergent-built, skin-pH kind.

Nearly every moisturiser is an emulsion of oil and water, and the ratio is the whole distinction. A lotion holds more water: it pours, spreads thin, sinks in fast and leaves little behind. A cream holds more oil: it sits where you put it, takes longer to disappear and leaves more behind. Not potency, not quality, not price. Two products can share an ingredient list almost line for line and land in different categories on water alone.

In practice More oil buys occlusion, which is the point for dry skin, winter, hands and feet, and a barrier in recovery. More water buys fast absorption and no residue, which suits skin that makes plenty of its own oil, large areas like arms and legs, and anything going under makeup or sunscreen. Most people need both at different times of year.

The Brightening Face Cream sits at the lighter end of cream. The Brightening Body Lotion is built for area coverage. Neither word is regulated, so read where water and the oils sit on the ingredient list.

Moisturiser is the job description: anything formulated to raise and hold the water content of the outer skin, through some mix of humectants, emollients and occlusives. Lotion, cream and butter are thickness grades of that same product. A lotion is a moisturiser. So is a cream, an ointment, a gel and a facial oil. Asking whether body lotion counts as a moisturiser is a question about vocabulary.

In practice Pick the grade by skin state and climate. Humid air flatters lighter grades. Dry air, heated rooms and long winters justify heavier ones. Tightness within an hour of a shower means the last application was too light. A greasy film at bedtime means it was too heavy.

Cham's one body moisturiser is lotion grade. There is no Cham body cream or butter.

A body lotion suits ordinary skin in ordinary weather: a whole body in a minute, dressed without waiting. A body cream shifts the ratio toward oil, so it is thicker, slower to absorb and leaves more of itself on the surface. It earns its place on visibly flaky or rough skin, in cold dry seasons, and on the chronic dry zones: shins, elbows, knees and heels.

In practice Plenty of people run both, lotion through the humid months and cream in winter, or lotion everywhere with cream kept for the rough spots. Body skin is thick and sparsely oiled, so it accepts heavy occlusion. There is very little in a shin to clog. Apply either to still-damp skin.

The Brightening Body Lotion is the lotion rung, built for mostly warm weather. If winter shins need a heavier grade, Cham does not currently make it.

Facial skin is thinner, carries far more oil glands per square centimetre, is uncovered all day and shows any reaction immediately. Body skin is thicker, sparsely oiled and lives under fabric. A body lotion is built for the second surface: richer occlusives such as shea butter, heavier emollients, and very often a higher fragrance load, because scent is half the pleasure of a body product. None of that is a flaw on a shin.

In practice Body lotion on the face once, in a hotel bathroom, is harmless. As a daily habit the odds shift: congestion along the jaw and hairline where heavier textures linger, and fragrance sensitivity that develops through repeated exposure. The swap works better the other way. Face products on the body are fine, and the only objection is the size of the container.

The Brightening Face & Body Serum is a genuine crossover, formulated for both surfaces from the outset. The Brightening Body Lotion, with its shea butter and richer emulsion, is a body product and stays one.

A serum is a light, fast-absorbing vehicle carrying a concentrated dose of an active, and its job is delivery. A moisturiser is an emulsion of water and lipids that slows evaporation and restocks the barrier's fats. Cream is not a separate category: gel, lotion and cream are the same family at different oil contents. So serum versus cream is not a contest. One delivers, the other seals.

In practice Thinnest to thickest. Serum, then moisturiser, is the whole rule for most evenings, with sunscreen last in the morning. A complete routine for most skin is three products, a cleanser, one leave-on active and a moisturiser, and the last two can be one product, since plenty of creams carry a working dose of an active. If skin is stinging or flaking, the correction is fewer layers.

The Brightening Face & Body Serum is the delivery layer. The Brightening Face Cream is the seal above it. Cham makes no toner and no essence, which is not an oversight.

Hydration is water content. Moisturisation is keeping that water in and resupplying the fats that hold skin together. Humectants such as glycerin, sodium hyaluronate, panthenol and urea bind water into the outer layer. Occlusives, emollients and ceramides slow its exit and restock the mortar. The two deficits feel different: short of water is tight after washing, dull and finely creased. Short of lipids flakes, roughens, itches and stings.

In practice Water first, then the seal. Humectants alone on lipid-poor skin evaporate away, and a heavy occlusive on dehydrated skin seals in a shortage. One well-built product does both for most skin. Two steps earn their place in deep winter or under forced-air heating. Drinking more water does not top up the outer layer.

The Brightening Face Cream carries both halves, humectants and lipids, in one texture. The serum is the two-step version's first half, humectants with no real seal.