Body wash and shower gel are, for practical purposes, the same kind of product: a liquid cleanser you rinse off. The names are marketing labels rather than defined categories, so ignore the label and read the ingredients. Bubble bath, bath soak and hand wash are different, because they are made for different jobs.

Search data shows people keep asking the swap questions. Can you use bubble bath in the shower? Is bath soak the same thing? Can you wash your hands with body wash? I have answered each with a reason, and said where I could not find a solid source.

What's the difference between body wash and shower gel?

I searched for a legal or regulatory definition of either term and could not find one. The pages that do describe a difference are mostly brand and retailer guides, and they contradict each other. Some say shower gel is the thicker one; others say body wash is. So no standard definition could be found, and I would not trust a bottle's name to tell you what is inside.

Where real differences exist, they sit in the formulation and the intended use:

• Cleansing ingredients (surfactants): how much, and which ones. See our guide to what SLS and SLES are in body wash for the usual suspects.
• Added moisturisers: some products include emollients, others barely any.
• pH: average skin surface pH is around 4.7, according to a multicentre study of 330 people published in the International Journal of Cosmetic Science in 2006. Products vary, and few brands print their pH.
• Whether it is meant for dilution: bubble bath goes into a full tub, while body wash goes onto skin more or less neat.

If a shower gel and a body wash have near-identical ingredient lists, they are the same product wearing different names. Our roundup of sustainable shower gel brands shows how much the labels overlap.

Body wash, shower gel, bubble bath and hand wash compared

The table below is a general guide to what each product is built for. Formulas vary by brand, so treat the "typically contains" column as a tendency, not a rule.

Can you use bubble bath as shower gel?

You can, but it is not what bubble bath is for. Bubble bath is designed to foam in a tub of water, so using it neat means putting a much stronger dose on your skin than it was made for. That is my reading, not a measured fact, so I have stuck to what NHS bodies say.

A Dudley Group NHS Foundation Trust leaflet (reviewed September 2025) notes that soaps and bubble baths are often fragranced, coloured or foam-making, and can dry and irritate the skin. A St George's NHS leaflet for children (November 2024) advises avoiding bubble baths and soaps, because they can irritate the skin around the genitals.

So the difference between shower gel and bubble bath comes down to purpose: one is for cleaning skin directly, the other for turning bathwater into foam. For a one-off in a hotel with nothing else, most people will be fine. If you or your child have sensitive skin, speak to a pharmacist or GP.

Can you use bath soak as shower gel?

Usually not, and it is worth knowing why "bath soak" is a slippery term. It has no standard meaning. One product might be mineral salts, another a bath oil, another a milky emollient. Is bath soak the same as shower gel? No: it is made to go into bathwater, and many do not contain much in the way of cleansing agents at all.

Read the label: if it says "add to bath", that is how it was intended. The Dudley Group leaflet also warns that soap and bath substitutes may make the shower or bath floor slippery, which is a good reason to be careful with oily products in a standing shower.

Can you use hand wash as body wash?

For most healthy skin, occasionally, yes. Hand wash is made for frequent washing of one small area, and there is no reason you cannot use it on your body in an emergency.

I could not find any official guidance on swapping these two directly, so this is the reasoning rather than a rule. A hand wash is not formulated with a whole body in mind, so using it every day can leave larger areas of skin feeling tight. If that happens, switch back, and ask a pharmacist if it persists.

Can you use shower gel as hand soap?

Yes. The NHS handwashing guidance (page last reviewed January 2023) asks for soap and water, rubbing all surfaces of your hands for around 20 seconds, then rinsing and drying thoroughly. As worded, it does not specify a type of soap. Shower gel does that job just as well as a pump of hand wash.

If your hands are cracked or sore, ask a pharmacist rather than guessing.

Can you use shampoo as body wash?

In a pinch, yes. I could not find an authoritative source either way, so I will keep this short: both are rinse-off cleansers, so a one-off will not do any harm for most people. The case against regular use is simply that shampoo is made for the scalp and hair, not for body skin. If your skin is dry or eczema-prone, the NHS advice (below) is to avoid soap-type washes altogether.

Bar soap or liquid wash: does it matter?

For most people, it comes down to preference and how your skin feels afterwards. Bar soap is traditionally made from fats and an alkali; many liquid washes use other cleansing ingredients, which is why they vary so much in how drying they feel.

The same 2006 study found that plain tap water (around pH 8 in Europe) raised skin pH for up to six hours. Washing itself nudges your skin, whatever you use. If your skin feels tight afterwards, our guide to body washes that don't dry skin is a good place to start.

Does shower gel kill germs?

No product is needed to "kill" anything for washing to work, and I will not claim that any product does. The NHS says proper handwashing "removes dirt, viruses and bacteria" to stop them spreading to people and objects. That is removal, not killing, and it comes from washing thoroughly with soap and water for about 20 seconds.

Antibacterial claims on a bottle are a regulated matter in the UK, not a texture or branding one. I could not verify the current rules well enough to quote them, so if a label makes that claim, treat it as the brand's statement and not mine. If you cannot wash, the NHS says an alcohol-based hand sanitiser is the alternative.

When does the choice actually matter?

For most of us, it hardly does. It starts to matter in a few situations:

• Eczema-prone skin: the NHS eczema treatment page (reviewed September 2024) lists soap as a possible trigger and advises washing with an emollient instead. Scottish NHS paediatric guidance goes further, saying soaps, shower gels and bubble baths are very irritant and should always be avoided. Our honest guide to body wash for eczema covers the options.
• Babies and children: the NHS page on urinary tract infections (reviewed July 2025) says not to use scented soap around the genital area.
• After swimming or sport: I could not find guidance saying you need a different product. The aim is the same: wash, rinse, dry. If your skin feels sore afterwards, ask a pharmacist.

Beyond that, speak to a pharmacist or GP.

Why so many of these come in plastic bottles

Check the back of almost any body wash and you will usually find water ("aqua") first on the ingredient list. That is why refills and concentrates exist: there is little point shipping water around in a new plastic bottle every few weeks. Our look at the best refillable body wash in the UK compares what is out there.

At Lifelong, we make refillable deodorant today (Luxe £49, Vibes £14.99, refills £8.99, and one refill lasts about 8 weeks). The REEFill line of hand soap, body wash and shampoo launches on Kickstarter in March 2027, with ocean-bound recycled containers and powdered refills in plastic-free compostable pouches. You can sign up for early-bird access at 40% off if you are curious.

Frequently Asked Questions

Is bath soak the same as shower gel?

No. Bath soak has no standard definition and is usually made to be added to bathwater, so it may contain salts or oils rather than much cleansing agent. Shower gel is made to wash skin directly.

Can you use bath soak as shower gel?

Generally not. Most are designed for dilution in a full bath, and some products may leave the floor slippery.

Can I use bubble bath as shower gel?

You can occasionally, but it is made to foam in a tub, not to be applied neat. NHS leaflets advise avoiding bubble bath on irritation-prone skin, including children's. If skin is sensitive, speak to a pharmacist or GP.

What is the difference between shower gel and bubble bath?

Shower gel is made to clean skin directly. Bubble bath is made to produce foam in a full tub of water, and is often fragranced and coloured.

Can you use shower gel as hand soap?

Yes. NHS handwashing guidance asks for soap and water, applied to all surfaces of the hands for around 20 seconds, and does not specify a type. If your hands are cracked or sore, ask a pharmacist.

Can you use shampoo as body wash?

Occasionally, yes. Both are rinse-off cleansers, but shampoo is made for hair and scalp, so regular use on the body is not what it was designed for. If skin is dry or eczema-prone, speak to a pharmacist.

What's the difference between body wash and shower gel?

There is no legal or standard definition that I could find. Brands use the terms interchangeably, and the guides that claim a difference disagree with each other. Compare ingredient lists instead.

Does shower gel kill germs?

Washing removes germs rather than killing them. The NHS says proper handwashing removes dirt, viruses and bacteria.