Essential Oil-Induced Photosensitivity: What It Is and How to Stay Safe in the Sun
You’re doing all the right things—using natural products, choosing essential oils over synthetic scents, and enjoying your time outdoors. But did you know that some essential oils, especially citrus oils, can cause painful skin reactions when exposed to sunlight?
It’s called photosensitivity, and it’s a reaction you’ll want to avoid—especially in the summer.
As a chemist and the founder of The Clean Chemist, I believe that knowledge is the best skincare ingredient. So let’s break down what photosensitivity is, why it happens, and how to stay protected while still enjoying the benefits of essential oils.
☀️ What Is Photosensitivity?
Photosensitivity (or phototoxicity) is a reaction that occurs when certain compounds in essential oils interact with ultraviolet (UV) light. This reaction doesn’t happen immediately—it takes place after the compound has absorbed into your skin and is then activated by sunlight.
The result?
🔸 Redness
🔸 Burns
🔸 Blistering
🔸 Long-lasting dark patches (hyperpigmentation)
It can look and feel like a chemical burn, even if you were only in the sun for a short time.
🧪 Why Do Some Essential Oils Cause It?
The chemistry behind photosensitivity comes down to compounds called furanocoumarins—naturally occurring molecules found in some plants, especially in the citrus family.
When these compounds are left on the skin and exposed to sunlight, they create an excited state that damages DNA and skin cells, leading to visible skin reactions.
Essential oils that are cold-pressed or expressed (rather than steam-distilled) tend to retain more of these compounds, which increases the risk.
🍋 Common Phototoxic Essential Oils
Here are a few essential oils that are known to be phototoxic:
Bergamot (unless it’s “bergapten-free” or “FCF”)
Lemon (cold-pressed)
Lime (cold-pressed)
Bitter orange
Grapefruit (less so, but still worth caution)
These oils are not dangerous in all situations, but they should be avoided in any product that will sit on your skin and be exposed to sunlight, such as body oils, lotions, lip balms, or perfumes.
✅ Safe Use and Formulation at The Clean Chemist
At The Clean Chemist, safety and transparency are at the heart of what we do. Here’s how we keep your skin protected:
We do not use phototoxic citrus oils in leave-on products like balms, butters, or facial oils.
When we do use citrus oils for scent, we choose steam-distilled versions that do not contain furanocoumarins.
All of our formulas are IFRA-compliant, meaning they meet global safety standards for essential oil use in skincare.
We always clearly label potential allergens and advise on proper sun-safe usage.
You shouldn’t have to choose between natural products and skin safety—and with the right formulations, you don’t have to.
💡 How to Protect Your Skin
Here are a few simple tips to avoid essential oil-induced photosensitivity:
Check your labels. Look for citrus oils in body products, lip balms, or anything labeled “natural fragrance.”
Know your terms. “FCF” (furanocoumarin-free) or “steam-distilled” citrus oils are safer options.
Apply with care. If you use a product with phototoxic ingredients, apply it at night or to areas covered by clothing.
Wear sunscreen. Always. Even natural products don’t replace sun protection.
🌿 Final Thoughts
Natural doesn’t always mean safe in every context—and when it comes to sun exposure, chemistry matters. Essential oils are powerful, aromatic, and complex, but they require thoughtful use.
At The Clean Chemist, we formulate with both science and skin in mind—especially for those with sensitive skin. Whether you're shopping online or visiting us at a local Indiana market, you can feel confident knowing our products are sun-safe, well-researched, and clearly labeled.
Want to shop sun-safe skincare?
Explore our shop page or find us at events across Indiana this summer—including the Aroma of Summer Market in Lafayette on July 27th!
