Picaridin vs DEET (2026): How the Two Repellent Actives Compare

Picaridin and DEET are the two most widely used mosquito repellent active ingredients in the United States. Both are recognized by the U.S. CDC as effective. At equivalent concentrations they offer comparable protection, but they differ on skin feel, fabric and plastic compatibility, odor, and slightly on safety profile. For most family and travel use, 20 percent picaridin matches or beats 25 percent DEET. For the highest-risk environments, DEET still has the edge.

This guide compares the two actives head-to-head on effectiveness, safety, skin feel, duration, and cost. It also covers where natural alternatives like PMD (oil of lemon eucalyptus) fit for families who want a plant-based option.

Quick comparison

Both actives are synthetic. Both are safe when used as directed. Both have decades of research behind them (DEET more than 60 years, picaridin more than 25 years).

What is DEET?

DEET (N,N-Diethyl-meta-toluamide) was developed by the U.S. Army in 1944 and became commercially available in 1957. It is the most extensively tested mosquito repellent in history. The EPA most recently reviewed DEET's safety in 2014 and confirmed it is safe for use on humans, including children from 2 months, at concentrations up to 30 percent.

DEET works by interfering with mosquitoes' ability to detect the carbon dioxide, lactic acid, and skin odors that they use to find a human host. Mosquitoes do not "fly into" DEET. They simply cannot find you while you are wearing it.

Higher concentrations of DEET do not repel mosquitoes more strongly. They protect for longer. At 7 percent DEET you get about 2 hours of protection. At 25 percent you get about 8 hours. At 30 percent (which is the upper limit recommended for skin application) you get about 10 hours. Above 30 percent the gain in duration is small and the trade-offs on skin feel and material damage grow.

What is picaridin?

Picaridin (also called icaridin, KBR 3023, or by the brand name Bayrepel) is a synthetic compound modeled after piperine, the active in black pepper. Bayer developed it in 1998. The World Health Organization recommends it for mosquito repellent use. The EPA approved it for U.S. retail in 2005.

Picaridin works through the same general mechanism as DEET: it interferes with mosquitoes' ability to find a human host. Lab and field studies have shown 20 percent picaridin to be roughly equivalent to 20 to 25 percent DEET against most mosquito species.

The standard U.S. retail concentration for picaridin is 20 percent. Lower concentrations (5 to 10 percent) are common in spray formulations marketed for shorter outings. Picaridin is not available in higher concentrations than 20 percent in the United States.

Effectiveness: head to head

The effectiveness comparison is the question most buyers actually want answered. Here is what the peer-reviewed data shows.

Against common Aedes and Culex mosquitoes (typical North American species)

Multiple lab and field studies, including a 2002 New England Journal of Medicine study and a 2015 Consumer Reports field test, found 20 percent picaridin and 25 percent DEET to be statistically equivalent for the first 6 to 8 hours of wear. After 8 hours both products start declining and the lower-concentration formulations decline faster.

Against Anopheles (malaria carrier)

Both picaridin and DEET are effective. The CDC recommends either for malaria-zone travel. DEET has the longer track record specifically against Anopheles in field conditions.

Against ticks

DEET is effective against ticks at 20 percent or higher. Picaridin is effective against ticks at 20 percent. For tick-heavy environments (hiking in the northeast U.S. in spring), the standard recommendation is permethrin-treated clothing plus DEET or picaridin on exposed skin.

Against black flies and biting midges

DEET is more effective than picaridin against biting flies. For people spending summers in Maine, Minnesota, or the Pacific Northwest, DEET is the right choice for black fly season.

Practical conclusion on effectiveness

For 90 percent of family and travel use cases, 20 percent picaridin and 25 percent DEET deliver essentially the same protection. For black flies and biting midges specifically, DEET has a real edge. For dengue or malaria-zone travel, either works and you should follow CDC guidance for the destination.

Safety: what the data actually says

Both ingredients have extensive safety records. The differences are subtle.

DEET safety profile

The EPA, CDC, and American Academy of Pediatrics all confirm DEET is safe when used as directed. Documented safety facts:

•        Allowed on children from 2 months at concentrations up to 30 percent (AAP)

•        More than 8 billion human applications since 1957 with very few documented adverse events

•        The most-studied repellent in history

•        Pregnancy: ACOG considers DEET safe during pregnancy at recommended concentrations

•        Sensitive skin: can cause skin irritation in some users, especially at higher concentrations

The well-known concerns about DEET (neurological effects, fabric damage, skin absorption) are mostly mythology amplified online. The neurological concern traces to a small number of case reports involving extremely high concentrations applied to broken skin in unusual conditions. At normal use, DEET is one of the most-studied and safest pesticides ever approved for human use.

Picaridin safety profile

Picaridin has 25-plus years of safety data, less than DEET but still substantial. Documented safety facts:

•        Allowed on children from 2 months at retail concentrations (AAP and CDC)

•        Lower skin irritation rate than DEET in head-to-head studies

•        No documented neurological concerns

•        Pregnancy: ACOG considers picaridin safe during pregnancy

•        Sensitive skin: well-tolerated; one of the gentlest CDC-recognized actives

Picaridin came to market more recently, so its safety record is shorter but cleaner. Most outdoor industry publications (REI, Backpacker, Outside) now default to recommending picaridin specifically because its skin tolerance is better than DEET.

Both are synthetic

A common reason families choose between DEET and picaridin is because they want to avoid synthetics. Both ingredients are synthetic. Picaridin is sometimes called "plant-derived" because its molecular structure was inspired by piperine from pepper, but the actual molecule is made in a chemistry plant, not extracted from a plant. If avoiding synthetic actives is important to you, neither one fits that requirement. PMD (covered below) is the only plant-based option recognized by the CDC.

Skin feel and material damage

This is where the differences become very practical.

DEET feels heavier on skin

DEET has a slightly oily feel and a mild medicinal odor. At 25 to 30 percent concentration it can feel sticky and leaves a noticeable film. This is why many users report disliking DEET despite its effectiveness.

DEET damages many synthetic materials on contact:

•        Plastic watch faces and watch bands

•        Sunglasses frames (especially nylon)

•        Painted nails

•        Synthetic fabrics including spandex, lycra, and some nylons

•        Camera and phone bodies (avoid skin-to-device contact while wearing DEET)

This is not "DEET is dangerous" mythology. It is documented chemical incompatibility. Manufacturers of binoculars, watches, and outdoor gear consistently warn against DEET contact.

Picaridin is gentle on materials

Picaridin has no documented material damage. It does not affect plastic, synthetic fabric, or paint. It has no odor and dries clean. This is the single biggest practical advantage of picaridin over DEET for everyday use.

Both are easier to apply as a lotion or wipe than as a spray

Aerosol sprays of either active are convenient but easy to over-apply and easy to inhale. Wipes and lotion formulations give you better control over coverage. For applying to children or to your face, a wipe is always the better choice.

Duration: how long each one lasts

Approximate protection duration by concentration:

This is why 20 percent picaridin matches higher-concentration DEET. The duration curves for the two ingredients are shaped differently. Picaridin gets more hours out of less concentration.

For an evening barbecue, 10 percent picaridin or 15 percent DEET is plenty. For a 10-hour hike, 20 percent picaridin or 25 percent DEET is the floor.

Cost and availability

DEET is cheaper because the patent expired decades ago and the active is produced at industrial scale. A 4-ounce bottle of OFF! Deep Woods (25 percent DEET) is about $6. A 4-ounce bottle of Sawyer Picaridin (20 percent) is about $10.

Both are widely available at REI, Target, drugstores, and online. Sawyer and Natrapel are the two main picaridin brands. OFF!, Cutter, and Repel are the main DEET brands.

What about natural alternatives?

For families who specifically want a plant-based active rather than picaridin or DEET, the CDC recognizes one option: PMD (also called oil of lemon eucalyptus, or OLE). This is the only plant-based active backed by the lab and field data the CDC requires.

PMD is extracted from the leaves of the lemon eucalyptus tree. At 8 to 30 percent concentration it provides 4 to 6 hours of mosquito protection comparable to lower-concentration DEET. The Walter Reed Army Institute of Research has tested PMD extensively, including in field conditions against dengue-carrier mosquitoes.

PMD trade-offs compared to picaridin and DEET:

•        Shorter duration: 4 to 6 hours vs 8 to 12 hours

•        Pleasant herbal-citrus scent vs no scent (picaridin) or medicinal scent (DEET)

•        Plant-based (yes) vs synthetic (both picaridin and DEET)

•        Minimum age 3 years for most PMD products; the Superbloc 8 percent formulation is labeled from 6 months

•        Cost is comparable to picaridin

Citronella, peppermint, lavender, and other "natural" repellents are not on the CDC list. These can have very short-duration effects (under 1 hour) but do not pass the efficacy testing required for CDC recognition.

For a fair comparison: a family planning a backyard barbecue who wants plant-based protection should use 8 percent PMD. A traveler going to a dengue zone should use 20 percent picaridin or 25 percent DEET. There is no shame in any of these choices. They are all CDC-recognized and all effective.

How to choose between them

The decision tree most families follow:

•        You want a no-odor, no-grease, no-fabric-damage option

•        You travel often (picaridin will not damage your watch, camera, or sunglasses)

•        You have sensitive skin

•        You want long-duration protection in a synthetic active

•        You are heading into heavy outdoor exposure (deep woods, dengue zones, black-fly territory)

•        You want the longest field-test track record

•        Cost is a primary factor

•        You want plant-based active backed by CDC efficacy data

•        You have young children (6 months and older, with PMD formulations labeled for that age)

•        You prefer gentle, alcohol-free, water-based formulations

•        You want a pleasant scent rather than a medicinal one

For most families, the right answer is a layered kit: a primary repellent for everyday use, and a backup higher-strength repellent for high-exposure days.

Common questions about picaridin vs DEET

Which is more effective overall?

At 20 percent picaridin and 25 percent DEET they are statistically equivalent for most mosquito species. DEET has a slight edge against black flies and biting midges. Picaridin has a slight edge on skin feel and material safety.

Is picaridin safer than DEET?

Both are safe when used as directed. Picaridin has a slightly lower skin-irritation rate in head-to-head studies. Both are allowed on children from 2 months. The safety difference is small enough that "which feels better on you" matters more than "which is technically safer."

Can I use them together?

There is no benefit to layering picaridin and DEET. Pick one and use the right concentration. If you need additional protection for high-risk environments, layer permethrin on clothing plus picaridin or DEET on exposed skin.

Why is picaridin more common in Europe than in the U.S.?

Picaridin came to market in Europe first. The U.S. lagged because DEET was already entrenched in the consumer market. European travel guides have recommended picaridin for decades. The U.S. is catching up.

Is picaridin natural?

No. Picaridin is synthetic. Its molecular structure was inspired by piperine (the active compound in pepper) but the molecule itself is manufactured. If you want a natural active backed by CDC efficacy data, PMD (oil of lemon eucalyptus) is the only option that meets that bar.

Does DEET cause cancer?

No. The EPA reviewed DEET safety most recently in 2014 and found no evidence linking DEET use to cancer at recommended concentrations and use patterns. The American Cancer Society does not list DEET as a carcinogen. Most "DEET causes cancer" claims online are unsubstantiated.

Can I use either during pregnancy?

ACOG (the American College of Obstetricians and Gynecologists) considers both picaridin and DEET safe during pregnancy at recommended concentrations. PMD is also considered safe. Ask your OB if you have specific concerns.

What about babies under 2 months?

No topical repellent is recommended for babies under 2 months, regardless of which active. Use mosquito netting on strollers and cribs, dress the baby in light long sleeves and long pants, and protect the parents from bites with whichever active suits the parents.

What concentration should I buy?

For most adult use: 20 percent picaridin or 25 percent DEET. Lower concentrations are fine for short outings (under 4 hours). Higher DEET concentrations (above 30 percent) are unnecessary for almost any retail use case.

Where do I look for the active ingredient on a label?

Active ingredients are printed on the back of the bottle, usually under a heading called "Active Ingredients" or "Drug Facts" in small type. The concentration is shown as a percentage. Anything without a CDC-recognized active listed is not a real mosquito repellent.

How Superbloc compares

Superbloc's hero product is an 8 percent PMD spray. It is the plant-based alternative to picaridin and DEET for families who want a CDC-recognized natural active. Most PMD products require ages 3 and up and use alcohol carriers that dry skin and damage fabric. Our formula is alcohol-free, water-based, with aloe and chamomile, and labeled safe from 6 months.

Trade-offs to know:

•        Superbloc is plant-based. Picaridin and DEET are not.

•        Superbloc lasts 4 to 6 hours per application. 20 percent picaridin lasts 8 to 12 hours.

•        Superbloc has a pleasant lemon-eucalyptus herbal scent. Picaridin has no scent. DEET has a medicinal odor.

•        Superbloc is alcohol-free water-based. Most picaridin and DEET formulations use either alcohol or oil carriers.

•        Superbloc is labeled from 6 months. Most plant-based PMD products require 3 years.

Browse the Superbloc range:

•        The everyday spray.

•        2 sprays plus 2 wipes packs.

Featured in goop and Harper's Bazaar.

Written by Tanya Lee, Founder, Superbloc