Natrapel
Natrapel Essential Oil Insect Repellent – Pets & People
Spray · FIFRA 25(b) minimum-risk repellent product (not EPA-registered)
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Pros
- A gentle soap-and-glycerin formula that's mild on skin and fully discloses its actives.
Cons
- Too dilute to repel: no proven mosquito protection.
- Thyme oil still carries a sensitization risk.
The full review
Built for use on both pets and people, this minimum-risk spray is not recommended, and the reason is plain: there is no proven mosquito protection. The actives are heavily diluted, led by thyme oil at 1.90%, so our model finds minimal or unproven cover against both mosquitoes and ticks and the effectiveness pillar nearly bottoms out. The claim audit was weak, with 3 of 4 entries rated weak, which holds evidence down. Safety is the other drag, driven by thyme oil's irritation and sensitization risk plus a pregnancy caution. Transparency is the lone strength, with every active concentration disclosed, but disclosure cannot rescue a formula too thin to work.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%8Mosquitoes: minimal or unproven protection. Ticks: minimal or unproven protection. Protection times are modeled from the actives, concentration, and format (see methodology). Scored on a saturating curve (each added hour counts less than the last), 65% mosquito / 35% tick, with reasonable confidence.
Mosquitoes: minimal or unproven protection. Ticks: minimal or unproven protection. Protection times are modeled from the actives, concentration, and format (see methodology). Scored on a saturating curve (each added hour counts less than the last), 65% mosquito / 35% tick, with reasonable confidence.
Evidence & honest claims25%48Thyme oil is well-supported by published evidence, weighted by how close its concentration is to the studied effective dose (base 56). Of 4 marketing claims audited: 1 strong, 0 moderate, 3 weak, 0 unsupported (-8).
Thyme oil is well-supported by published evidence, weighted by how close its concentration is to the studied effective dose (base 56). Of 4 marketing claims audited: 1 strong, 0 moderate, 3 weak, 0 unsupported (-8).
Safety15%68From published dermal toxicology (EPA/CIR/IFRA), scaled by each active's concentration against its leave-on limit: moderate skin-sensitization risk from Thyme oil at 1.90% (−10); high irritation risk from Thyme oil at 1.90% (−12); caution advised in pregnancy (−6); moderate aquatic toxicity (−4).
From published dermal toxicology (EPA/CIR/IFRA), scaled by each active's concentration against its leave-on limit: moderate skin-sensitization risk from Thyme oil at 1.90% (−10); high irritation risk from Thyme oil at 1.90% (−12); caution advised in pregnancy (−6); moderate aquatic toxicity (−4).
Transparency15%88This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 20% of all ingredient concentrations (+3); the full formula including inerts is accounted for (+25).
This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 20% of all ingredient concentrations (+3); the full formula including inerts is accounted for (+25).
Every pillar is scored from published rules. Read how we score.
How long it protects
Complete protection ends when the first bite gets through; partial protection keeps reducing bites as repellency decays. EPA label times are verified; the rest are modeled from the actives, concentration, and format.
Mosquito estimate basis (low confidence)
Botanical actives show little to no reliable mosquito protection; reapply very frequently if used at all. No measured CPT below 10% for this active — estimated via sigmoid dose-response (×0.01 of Luker 2023 (10% lotion, tick CPT 55 min)).
Tick estimate basis (low confidence)
Botanical actives show little to no reliable tick protection; reapply very frequently if used at all. No measured CPT below 10% for this active — estimated via sigmoid dose-response (×0.01 of Luker 2023 (10% lotion, tick CPT 55 min)).
Ingredient disclosure
This product publishes an ingredient list (+20); discloses 100% of active concentrations (+40); discloses 20% of all ingredient concentrations (+3); the full formula including inerts is accounted for (+25).
- Lemongrass oilActive
Active repellent · 0.05%
- GeraniolActive
Active repellent · 0.05%
- Thyme oilActive
Active repellent · 1.90%
- Myristic acid
Inert · concentration not disclosed
- Palmitic acid
Inert · concentration not disclosed
- Polyglyceryl oleate
Inert / emulsifier · concentration not disclosed
- Potassium oleate
Inert / surfactant · concentration not disclosed
- Potassium stearate
Inert / surfactant · concentration not disclosed
- Soap
Inert / emulsifier · concentration not disclosed
- Sodium chloride
Inert · concentration not disclosed
- Stearic acid
Inert · concentration not disclosed
- Glycerin
Inert / humectant · concentration not disclosed
- Water
Inert / carrier · concentration not disclosed
- Hydroxypropyl methyl cellulose
Inert / thickener · concentration not disclosed
- Lecithins
Inert / emulsifier · concentration not disclosed
Claims audit
What the marketing says, versus what the evidence supports.
“FIFRA 25(b) minimum-risk product”
OtherStrongConsistent with the label's active/inert declaration; exempt from federal EPA registration.
“Safe for pets and the whole family when used as directed”
SafetyWeakThyme oil at 1.90% is a high skin-sensitization/irritation risk at this level, so a "gentle / safe-for-kids" claim overstates the safety profile.
“Repels fleas, mosquitoes, and ticks”
EfficacyWeakMosquito and tick protection are both 'minimal / unproven'; only thyme oil is meaningfully dosed (1.90%, 0.8) while geraniol (0.05%, 0.01) and lemongrass (0.05%, 0.01) are trace, so broad repel-mosquitoes-fleas-ticks is implied beyond the formula.
“Kills biting insects on contact, including fleas, mosquitoes, and ticks”
EfficacyWeakContact-kill claim for a low-concentration essential-oil spray; no supporting data published.
How to apply it
Apply to exposed skin or pet coat per the product label, avoiding contact with eyes. Wash hands thoroughly with soap and water after handling and before eating or drinking. If signs of sensitivity occur on skin (human or animal), wash with mild soap and rinse with large amounts of water; consult a doctor or veterinarian if signs continue. Reapply as directed on the label. Store in a cool, dry place away from children and pets.