We have made tanning oil in Bangkok since 1995, which means we have watched thirty summers of people getting this wrong in the same handful of ways. This is everything we wish you knew before your first beach day — including the part that is uncomfortable for a company that sells tanning oil to say out loud.
Start with what a tan actually is
Ultraviolet radiation reaches the outer layer of your skin and damages the DNA in those cells. Your skin responds defensively by producing more melanin, the pigment that darkens the tissue and absorbs some of the next round of UV. That darkening is the tan.
So the colour is not a sign of health, and it is not the sun "topping you up". It is a visible record of an injury and the body's repair response to it. Dermatologists are unanimous and blunt about this: all tans are a sign of DNA damage, and there is no such thing as a safe tan. UV also generates reactive oxygen species in skin cells, and the damage accumulates across a lifetime into the wrinkles, the pigmentation, and the skin cancer risk that show up decades later.
The trade-off, stated honestly
If your only goal is skin health, the answer is simple and you already know it: stay out of the peak sun, cover up, wear SPF 50, and take your colour from a bottle of self-tanner that involves no UV at all. That is genuinely the best answer, and we will not argue with anyone who takes it.
If you are going to be in the sun anyway — and in Thailand, most people are — then the question becomes how to manage the dose. That is a real question with real answers, and getting it right is the difference between a slow, even colour that lasts and a burn that peels off in a week and leaves the damage behind without even the colour to show for it.
Rule one: a burn is a failure, not a stage
The single most common belief we hear is that you have to "burn a little first". This is wrong in the way that matters most. A burn is inflammation from an overdose of UV — it is not a precursor to melanin, it does not "turn into" a tan, and it actively destroys the colour you are chasing, because burned skin peels and the pigment lives in the cells that come off.
Worse, by the time you can see pink, the damage happened hours ago. Sunburn redness usually appears two to six hours after exposure and does not peak until twelve to twenty-four hours later. The skin that looks fine as you pack up the towel can be scarlet by dinner. You cannot use your own colour as a live warning system, which is precisely why the clock and the UV index matter more than how you feel.
Rule two: many short sessions beat one long one
Melanin production takes time — days, not hours. Sitting out for six hours does not produce six hours' worth of tan; it produces roughly the tan of a shorter session plus a burn. The dose that darkens skin and the dose that damages it are not the same curve, and the gap between them is where a good tan lives.
The practical approach across a week at the beach:
- Day one is the shortest. Whatever you think you can handle, do less. You cannot undo day one on day two.
- Go early or late. The hours either side of the middle of the day deliver far less UV for the same time on the sand.
- Build up. Add a little more exposure each day as your skin actually responds, not on the schedule you had in your head.
- Take a day off. Skin repairing itself is skin holding on to colour. A full rest day mid-week does more for the final result than another afternoon.
Rule three: know your own skin
Not everybody gets the same number of minutes. Very fair skin that always burns and never tans is not going to produce a deep tan no matter the method — it will produce burns, and the honest advice for that skin type is sunscreen, shade, and a self-tanner. Skin that tans readily still accumulates damage; it simply hides it better and for longer, which is its own risk.
And the WHO is clear that in the low band — a UV index of 2 or under — even very fair-skinned people need no protective measures in normal circumstances — the flip side being that in the high and extreme bands typical of a Thai afternoon, everyone does.
Rule four: the two-bottle system
This is the part we get asked about most, so here it is plainly. Our tanning oils are SPF 2 and our tanning lotions are SPF 4. Neither is sun protection — at SPF 2, roughly half the UVB still reaches your skin. They are conditioning oils that make skin supple, help colour develop evenly, and stop the dry, patchy finish that sun alone produces.
So run two bottles with two jobs:
| Where | What goes on it | Why |
|---|---|---|
| Face, ears, back of neck | Broad-spectrum SPF 50 · PA+++ | Highest-exposure, thinnest skin, where sun damage shows first and burns most often |
| Chest, shoulders, tops of feet | SPF 30–50 | Faces the sun most directly when lying down; burns before you notice |
| Arms, legs, back | Tanning oil, on a clock | The skin you are deliberately colouring — with a hard time limit, not all day |
| Any skin already pink | Cover it | It is done for today. Nothing you apply changes that |
Rule five: reapply, properly
Sunscreen degrades in sunlight and comes off with water, sweat and towel-drying. The American Academy of Dermatology's guidance is to reapply every two hours outdoors, and immediately after swimming or sweating. Water-resistant products are rated for 40 or 80 minutes in water — that is a tested limit, not a suggestion, and it resets the moment you towel off.
And use enough. Lab testing applies 2 mg per square centimetre — about 30 ml for an adult body, half a teaspoon for the face and neck. Studies consistently find people applying a quarter to a half of that, which is how an SPF 50 quietly performs like something far lower. A generously applied SPF 30 protects better than a thin SPF 50, every single time.
Rule six: the day is not over when you leave
UV damages the skin barrier, water escapes faster than normal, and dried-out skin peels — taking your colour with it. The hours after the beach decide how much of the tan you actually keep. Cool rinse rather than a hot shower, pat dry, apply aftersun while the skin is still damp, and go again before bed and the next morning.
The full routine, including the honest research on what aloe does and does not do, is in the after sun ritual.
When to stop and see someone
A burn that blisters, covers a large part of the body, or arrives with fever, chills, nausea, dizziness or confusion is a medical matter, not an aftersun matter. So is any significant burn on a young child. And separately from burns: learn what your moles look like and see a doctor about any that change in size, shape, colour or edge, or that bleed or will not heal. Skin checks are cheap and dull, which is exactly what you want them to be.
The whole field guide, in nine lines
- A tan is damage. Decide what you want knowing that.
- A burn is a failure, not a stage — and you will not see it until hours later.
- Check the UV index before the thermometer.
- Short sessions, early or late, building across days.
- Two bottles, two jobs: real SPF where you are protecting, oil where you are colouring.
- Use twice as much sunscreen as feels natural.
- Reapply every two hours and after every swim.
- Cool rinse, aftersun on damp skin, three times on day one.
- Blisters, fever, or a changing mole — see a doctor, not a bottle.