What Is a Tan Extender, and Do You Need One?

A tan extender is a moisturizer made to keep a spray tan looking even as it fades. Many contain a small amount of the same active ingredient as your spray tan, DHA, so each application quietly adds a little color back to the fresh skin that replaces the tanned skin you shed. You start using it a couple of days after your tan, in thin layers.

It’s the simplest add-on there is, and it’s the one people skip. Here’s what it does, who actually benefits from it, and how to use one without creating new problems.

Why a tan needs extending at all

Your spray tan lives in the outermost layer of your skin, which is always shedding. As tanned cells flake away, untanned cells take their place. That’s why even a perfect tan from Rosie’s studio in Midwood has a natural life of about 7 to 10 days. The full explanation, day by day, is in our pillar guide, how long does a spray tan last.

The shed isn’t perfectly even. Hands, feet and anywhere with friction go first. Dry patches lift in little islands. A tan extender works on both problems at once: the moisturizer slows and smooths the shedding, and the low dose of color tops up the new skin coming through.

What’s actually in one

Formulas vary, but most tan extenders combine two things:

• A hydrating lotion base. Humectants like glycerin or hyaluronic acid, plus soothing ingredients like aloe. This is the part that keeps skin supple so it sheds slowly and evenly.
• A low concentration of DHA. DHA (dihydroxyacetone) is the color additive the FDA approves for external sunless tanning (not for the eyes, lips or mucous membranes). In an extender it’s used at a much lower level than in a professional spray, so it builds gently over several applications instead of changing your color overnight.

Some products sold as “tan extenders” have no DHA at all; they’re rich moisturizers designed to slow fading. Both kinds help. The ones with DHA do more, but they also need a bit more care in how you apply them. The label will tell you which you have.

Tan extender versus your everyday body lotion

A regular lotion will help, as long as it doesn’t contain anything that breaks the tan down. Many everyday lotions, though, include exfoliating acids, heavy oils or fragrance-heavy formulas that work against you. An extender is formulated with a tan in mind. If you’re choosing your own, our ingredient guide to the best soap and lotion after a spray tan covers what to look for.

Do you need one?

Not every tan needs an extender. If you’re tanning for a single evening and you’re happy to let it fade afterwards, good everyday moisturizing is enough. An extender earns its place when:

• Your event lasts more than a day. A wedding and the week of sheva brachot, a bar mitzvah weekend, a family trip. You want Day 6 to look like Day 3.
• You have dry skin, or it’s winter and the radiator is winning. Dry skin sheds faster and patchier.
• You’re traveling somewhere with sun, pools or the ocean. Chlorine and salt water are drying; an extender helps you recover each evening. See spray tan before vacation.
• You tan regularly and want to stretch the time between appointments. That plays into how often you should get a spray tan.

When to start

Not on Day 0. Your tan needs about 8 hours to develop, and then a lukewarm, soap-free first rinse. Give it until the color has peaked, on Day 2, and start the extender on Day 2 or 3. From then on, use it every day or every other day, depending on the product’s directions and how dry your skin is.

How to apply a tan extender

Start with clean, dry skin

After a short, lukewarm shower, pat dry completely. Applying to damp skin can dilute the product unevenly.

Use less than you think

A thin, even layer, worked in the way you’d apply a light body lotion. Thick layers are where streaks come from.

Go lighter on the joints

Elbows, knees, ankles and knuckles grab color. Use whatever is left on your hands for those areas rather than a fresh dollop.

Feather the edges

Blend down past your wrists onto the backs of your hands and past your ankles onto the tops of your feet with very little product, so there’s no line where you stopped.

Wash your palms straight away

Soap and water on the palms and between the fingers, right after. If your extender contains DHA, it will tan your palms just as willingly as your legs. A tanning mitt, if you have one, makes this easier.

Let it dry before dressing

A few minutes is usually enough. Light clothes, not your white silk blouse, until you know how the product behaves.

Common mistakes

• Applying it over flaking skin. Color settles into the edges of a lifting patch and makes it look darker. Moisturize the area for a day first.
• Using it on the face as heavily as the body. Facial skin is thinner and gets cleansed more often. If the label allows face use, apply a much lighter layer.
• Starting too early. Before the first rinse and peak, an extender can blend into the still-developing color unevenly.
• Expecting it to rescue a tan that’s gone. By Day 9 or 10, if most of the color has shed, an extender won’t rebuild it. That’s the moment to clear the remains and book again.

If you have sensitive skin, a skin condition, or you’re pregnant, check the ingredients with your doctor or dermatologist before adding any new product to your routine.

Where the extender in the Spray Tan+ kit fits

Rosie offers two full-body options. The Spray Tan is 20 minutes and $100. The Spray Tan+ is 35 minutes and $150: it adds extra prep and contouring time in the studio and sends you home with a kit of tan-safe soap, a tan extender, and natural lotions to preserve the tan.

The point of the kit is that you don’t have to stand in a drugstore aisle reading labels. The soap won’t strip your tan, the lotions keep your skin hydrated, and the extender carries the color through the back half of the week. Follow the directions on the bottle for how often to apply it, and ask Rosie at your appointment if you’re unsure. It’s a natural fit before a wedding, a simcha weekend or a trip. Both options are on the services and prices page.

For the rest of the longevity routine (showers, towels, workouts), see how to make a spray tan last longer. To book, call or text (917) 326-0303.