How Does Sunless Tanning Lotion Work? Everything You Need to Know

Self-tanning products such as sunless tanning lotion or drops are becoming more and more popular. Why? They are very easy to use and extremely effective – after just a few hours you can enjoy the effect of a beautiful and natural tan. It is also a dream come true that the whole process takes place at home – you do not even have to go out in the sun or visit a tanning salon. But have you ever wondered how self-tanners and self-tanning drops work? We have prepared a vast amount of knowledge and interesting facts for you!

Is self-tanner safe?

Self-tanner is not harmful to your skin! Its composition includes a mysterious ingredient called DHA – dihydroxyacetone. After contact with the epidermis, it reacts with the proteins and amino acids contained in it, resulting in the colouring of the outer surface of the skin. Dihydroxyacetone is mild and should not cause any allergic reactions. So are self-tanners safe? Yes, they are.

The higher the concentration of DHA in the cosmetic, the darker the effect you will get. The amount of DHA is also the main difference between self-tanning lotions and bronzing lotions – the latter have much less of it.

DHA – what is it?

Self-tanner – how does it work? Self-tanning products do not change the colour of the skin immediately. Dihydroxyacetone starts to work after a few hours, so after applying the self-tanner, you should wait about 6–8 hours before you wash off the excess of the cosmetic in the shower.

Self-tanner – is it safe? Are self-tanners toxic? The active DHA ingredient is a white powder that dissolves in water. So where does the tan/brown colour of self-tanner with DHA come from? Manufacturers add brown dye to achieve this effect. It is extremely helpful when applying the self-tanner – thanks to this you know which part of the body you have already covered with the cosmetic.

What does the self-tanner contain?

How does self-tanner work?

• Some self-tanning products also contain ingredients called erythrulose and tyrosine. Erythrulose starts to work after about 2 days, but significantly affects the durability of the tan. Tyrosine stimulates the production of melanin in the skin and accelerates the tanning process. For this reason, it is often used in accelerators and bronzing accelerators.
• Many self-tanning products, in addition to bronzing properties, have a high ability to moisturise and nourish the skin. What would a beautiful tan be without properly cared-for skin? Shea butter, aloe vera, coconut oil – these are just some of the ingredients that make self-tanners even more attractive.

If you are looking for a customisable self-tanning solution for your skincare routine, try OnyxTan Self Tanning Drops for Face. This product makes it easy to build a natural-looking glow gradually and is a great option for anyone who wants more control over the depth of their tan.

Does the self-tanner protect against UV radiation?

Unfortunately not – despite the beautiful effect of bronzed skin, which we often want to achieve before a holiday, self-tanner does not protect against sunlight. Self-tanner with SPF is fairly rare. Most self-tanners do not contain sunscreen. When sunbathing, always remember to use the right moisturiser with SPF.

Self-tanner – a product for everyone!

There are many self-tanning products on the market – in lotion, mousse and mist form. Everyone can find something for themselves. On top of obtaining a dreamy, natural tan, your skin will receive the proper level of hydration and nourishment.

Quick answer: how does sunless tanning lotion work?

Sunless tanning lotion uses DHA (dihydroxyacetone) — a colourless sugar that reacts with amino acids in your skin's surface cells to produce a brown pigment. No UV is required. Results usually last 5–7 days and can be built up gradually for a deeper, more natural-looking tan.

Sunless tanning has improved significantly over the last decade. The orange, streaky formulas many people remember from the early 2000s have been replaced by more advanced DHA-based products that can deliver a warm, even, natural-looking result when used correctly.

If you are looking for a UV-free glow, a well-formulated self-tanner can be an excellent alternative to traditional tanning.

The science behind DHA: what actually happens on the skin?

DHA, or dihydroxyacetone, is a simple sugar often derived from glycerine. Once applied to the skin, it reacts with free amino acids in the outermost layer of the epidermis, known as the stratum corneum. This creates brown-coloured compounds called melanoidins, which give the skin a tanned appearance very similar to a natural tan.

This process is often compared to the browning reaction that happens when bread is toasted. Importantly, the reaction only takes place on the surface layer made of dead skin cells. That is why self-tanner does not penetrate deeply into the skin and why the colour gradually fades as those skin cells naturally shed over time.

Most self-tanning lotions begin developing within 2–4 hours, while the final effect is usually visible after 6–8 hours. Depending on the product, your skincare routine, and the condition of your skin, the tan can last anywhere from 5 to 7 days, and sometimes even longer with proper aftercare.

How to get an even, natural-looking self tan

Getting a flawless self-tan is not just about the formula itself – preparation and application technique make a huge difference. If you want your sunless tanning lotion to look smooth and realistic, follow these steps:

1. Exfoliate 24 hours before application

Pay special attention to dry areas such as elbows, knees, ankles and wrists, because DHA tends to build up more strongly there.

2. Apply a light moisturiser to dry areas

Right before self-tanning, use a small amount of lotion on places that usually absorb more product. This helps prevent dark patches.

3. Apply the product in circular motions

Work section by section, blending carefully over the body for a more even finish.

4. Blend over hands and feet lightly

Use the remaining product on your mitt or hands to soften the edges and keep the result natural.

5. Wash your hands thoroughly right away

Soap and water are essential if you apply with bare hands; otherwise palms and fingers may become stained.

6. Wait at least 8 hours before showering

For the deepest colour, many people leave the product on for 10–12 hours before rinsing.

7. Moisturise daily after the first rinse

Hydrated skin keeps the tan looking fresher for longer and helps it fade more evenly.

If you want to extend the life of your glow, pair your self-tan with regular moisturisation and avoid aggressive scrubs immediately after development. For a more customisable facial tanning routine, OnyxTan Self Tanning Drops for Face can be a practical choice, especially if you want to control the intensity of your result.

DHA concentration and expected tanning result

3–5% DHA

Colour result: Light golden tan
Best for: Fair skin, beginners, first-time users
Development time: 4–6 hours

6–8% DHA

Colour result: Medium bronze
Best for: Medium skin tones, moderate tan lovers
Development time: 3–5 hours

9–12% DHA

Colour result: Deep tan
Best for: Darker skin tones, experienced users
Development time: 2–4 hours

12%+ DHA

Colour result: Very deep bronze
Best for: Professional use, competition preparation
Development time: 2–3 hours

As a general rule, a lower DHA percentage gives a softer and more subtle effect, while a higher concentration creates a deeper tan faster. Beginners usually prefer lower to medium DHA formulas, while experienced users often choose stronger products for a darker result.

Why modern self-tanners look more natural than older formulas

Today’s self-tanning lotions are more advanced than older generations of products. Brands now focus not only on bronzing performance, but also on skin feel, hydration, absorption speed and undertone balance. This is why many modern formulas are less likely to look orange, patchy or overly heavy on the skin.

A high-quality self-tanner often combines DHA with supportive skincare ingredients that help maintain softness and improve the final look of the tan. Moisturising ingredients can reduce uneven fading, while better cosmetic bases make the application easier and more comfortable. The result is a product that feels more like skincare and less like an outdated tanning cosmetic.

For people who want a subtle glow tailored to their routine, facial tanning drops can be especially convenient. OnyxTan Self Tanning Drops for Face are designed for gradual, adjustable colour, making them a great option for anyone who prefers a more personalised self-tanning experience.

Frequently asked questions about sunless tanning lotion

What is sunless tanning lotion?

Sunless tanning lotion is a self-tan product that uses DHA (dihydroxyacetone) to create brown pigmentation on the skin's surface without any UV exposure. It is one of the most popular and proven methods for getting a tan without sunbathing.

How long does sunless tan last?

A sunless tan typically lasts 5–7 days, fading naturally as the outermost skin cells shed. With daily moisturisation, many people can extend the effect to 8–10 days. Light exfoliation after several days can help prepare the skin for a fresh reapplication.

Is sunless tanning lotion the same as self-tanner?

Yes – the terms sunless tanning lotion, self-tanning lotion and self-tanner are commonly used interchangeably. In most cases, they all refer to DHA-based formulas that create colour without UV exposure.

Does sunless tanning lotion stain clothes or bed sheets?

During the development period, some transfer onto fabric is possible, especially within the first several hours after application. It is best to wear loose, dark clothing and use darker bedding if you apply self-tanner before bed. Fast-absorbing formulas can help minimise transfer, but it is still wise to give the product time to set before dressing.

Can sunless tanning lotion replace UV tanning?

If your goal is visible colour, yes – a well-made DHA lotion can create a result that looks very similar to a tan developed in the sun. However, self-tanner does not involve UV exposure, so it does not replace sunlight for vitamin D production or other sun-related effects.

How can I make my self-tan last longer?

The best way to extend your self-tan is to keep the skin moisturised daily, avoid harsh exfoliants and use gentle body washes. Dry skin sheds more quickly, which can shorten the life of the tan and make fading uneven.

What is the best self-tanner for beginners?

Beginners usually do best with a light to medium DHA formula and an easy-to-apply texture such as lotion or mousse. These formulas are more forgiving and allow you to build the colour gradually instead of going too dark too fast.

Should I shave before or after using self-tanner?

It is usually best to shave or wax at least 24 hours before applying self-tanner. This gives the skin time to calm down and helps the product develop more evenly without settling into freshly opened pores.

Are self-tanning drops good for the face?

Yes, self-tanning drops are a popular option for facial tanning because they allow more control over the final result. They are especially useful for people who want a gradual glow and prefer to adjust the depth of colour over time. OnyxTan Self Tanning Drops for Face can be a great choice for building a natural-looking facial tan that fits your skincare routine.

Final thoughts

Self-tanning lotion is one of the easiest ways to enjoy a healthy-looking glow without UV exposure. Thanks to DHA and modern skincare-based formulas, today’s self-tanners can deliver a natural, even result that fits many different skin tones and routines. With the right preparation, application method and aftercare, a beautiful sunless tan is easier than ever to achieve.

If you want to build a complete tanning routine or add a customisable face tanning product to your regimen, take a look at OnyxTan Self Tanning Drops for Face and discover an easy way to create a gradual, natural-looking glow.