Does Big Bear Tick Guard Actually Work?
Big Bear Tick Guard is made with Oil of Lemon Eucalyptus (OLE), a plant-based active ingredient widely recognized for helping repel ticks, mosquitoes, and other insects.
OLE-based insect repellents are commonly used as a natural alternative to DEET-based sprays.
When used properly, OLE can help reduce the likelihood of insect bites during outdoor activities such as:
- Hiking
- Camping
- Trail walks
- Fishing
- Gardening
- Parks and outdoor events
The CDC (Centers for Disease Control and Prevention) recognizes Oil of Lemon Eucalyptus (OLE) as one of the active ingredients recommended for helping prevent tick bites.

Active Ingredient — OLE vs. Essential Oils
Not all “natural bug sprays” are the same.
When choosing an insect repellent, it is important to look for:
Oil of Lemon Eucalyptus (OLE)
—not just:
- “lemon eucalyptus essential oil”
- generic eucalyptus oil
- random essential oil blends
OLE is different from regular essential oils.
The active component in OLE is:
PMD (p-menthane-3,8-diol)
PMD is what gives OLE its insect-repelling properties.
Many products may contain essential oils for scent, but OLE is one of the only plant-based active ingredients recognized by the CDC Tick Prevention Guidelines for helping reduce the risk of tick bites.
What Is Oil of Lemon Eucalyptus (OLE)?
Oil of Lemon Eucalyptus (OLE) is a plant-derived ingredient made from the leaves of the lemon eucalyptus tree.
The active component responsible for its insect-repelling properties is called:
PMD (p-menthane-3,8-diol)
PMD is what helps create the protective effect against insects.
How Does OLE Work?
Ticks and mosquitoes locate humans using:
- Body heat
- Carbon dioxide from breathing
- Skin odours and sweat compounds
OLE works by helping interfere with the insect’s ability to detect and target people.
In simple terms:
It helps make it harder for insects to recognize you as a target.
This can help reduce bites when applied correctly and reapplied as directed.
Why Do People Choose OLE-Based Repellents?
Many people prefer OLE-based insect repellents because they are:
- DEET-free
- Plant-based
- Effective for outdoor use
- Commonly used for hiking and camping
- Lightweight and easy to apply
Does OLE Work Against Ticks?
OLE has been studied and used for helping repel:
- Ticks
- Mosquitoes
- Black flies
- Other biting insects
Proper application is important for best results.
How Long Does It Last?
Big Bear Tick Guard should be reapplied:
Every 4 to 6 hours as needed
Reapplication may be needed sooner after:
- Heavy sweating
- Swimming
- Prolonged outdoor exposure
Is It As Strong As DEET?
Different insect repellents work differently depending on:
- Environment
- Insect type
- Duration of exposure
- Concentration
- Application amount
Many people choose OLE-based repellents because they want a more plant-based alternative while still helping reduce insect bites during outdoor activities.
Best Practices for Tick Protection
No insect repellent can guarantee 100% protection. For best results:
- Apply before outdoor activity
- Reapply as directed
- Wear long sleeves and pants in high-risk areas
- Avoid tall grass when possible
- Perform tick checks after being outdoors
You can also learn more about tick prevention directly from the CDC Tick Prevention Guidelines.