What is capsaicin?
Capsaicin is the ingredient found in different types of hot peppers, such as cayenne peppers, that makes the peppers spicy hot. You can eat it in raw or cooked peppers or as a dried powder, which you can add to food or drinks. It also is available as a natural health product, in topical creams that you apply to your skin, or as a skin patch.
What is capsaicin used for?
Capsaicin is used to help relieve pain. Capsaicin works by first stimulating and then decreasing the intensity of pain signals in the body. Although pain may at first increase, it usually decreases after the first use. Capsaicin stimulates the release of a compound believed to be involved in communicating pain between the nerves in the spinal cord and other parts of the body.
When you apply capsaicin cream, gel, lotion, or ointment to the skin (topical use), it may help relieve pain from:
- Pain disorders, including pain after surgery.
- Nervous system problems such as diabetic neuropathy, trigeminal neuralgia, and post-herpetic neuralgia (shingles).
- Cluster headaches.
- Joint problems such as osteoarthritis and rheumatoid arthritis.
- Skin conditions such as psoriasis.
- Mouth sores due to chemotherapy or radiation.
You can put products that contain capsaicin on your skin up to 4 times a day. You may feel a burning or itching sensation the first few times you use capsaicin, but this will gradually decrease with each use. Wash your hands thoroughly after each use to avoid getting capsaicin in your eyes or on other moist mucous membranes, where it can cause a burning sensation. Do not use capsaicin on areas of broken skin.
When you eat hot peppers or take capsaicin as a dietary supplement, the capsaicin may improve your digestion by increasing the digestive fluids in the stomach and by fighting bacteria that could cause an infection. It may also help fight diarrhea caused by bacterial infection.
Is capsaicin safe?
Experts in Canada generally consider capsaicin to be safe. But it can cause some unpleasant effects, especially for those who are not used to it. Be careful when you cook with or eat hot peppers. Begin with small amounts, and increase the amount as you get used to it.
An allergic reaction to capsaicin is possible. If you are just beginning to use capsaicin, either as fresh or prepared food or in powder form, start with small amounts. If you use a topical product that contains capsaicin, you should first apply it to a small area of skin to test for an allergic reaction.
To reduce the burning sensation, remove the seeds from the peppers before you eat or cook with them. Also, if you eat bananas along with the peppers, you may reduce the burning sensation.
Don't let capsaicin come into contact with your eyes and other moist mucous membranes. After you touch capsaicin (or hot peppers), use vinegar or soap to wash your hands so you don't accidentally spread capsaicin to your eyes, nose, or mouth. You can also use disposable gloves to handle hot peppers or to apply topical products that contain capsaicin.
Do not apply topical products that contain capsaicin to areas of broken skin.
The Natural and Non-Prescription Health Products Directorate (NNHPD), within the Health Products and Food Branch of Health Canada, regulates natural health products in Canada. Natural health products, including capsaicin, must be reviewed and approved by the NNHPD before they can be sold in Canada.
Always tell your doctor if you are using a natural health product or if you are thinking about combining a natural health product with your conventional medical treatment. It may not be safe to forgo your conventional medical treatment and rely only on a natural health product. This is especially important for women who are pregnant or breastfeeding.
When using natural health products, keep in mind the following:
- Like conventional medicines, natural health products may cause side effects, trigger allergic reactions, or interact with prescription and non-prescription medicines or other natural health products you might be taking. A side effect or interaction with another medicine or natural health product may make other health conditions worse.
- The way natural health products are manufactured may not be standardized. Because of this, how well they work or any side effects they cause may differ among brands or even within different lots of the same brand. The form of natural product that you buy in health food or grocery stores may not be the same as the form used in research.
- Other than for vitamins and minerals, the long-term effects of most natural health products are not known.
Other Works Consulted
- Capsicum peppers (2009). In A DerMarderosian et al., eds., Review of Natural Products. St. Louis: Wolters Kluwer Health.
- Murray MT (2013). Capsicum frutescens (cayenne pepper). In JE Pizzorno, MT Murray, eds., Textbook of Natural Medicine, 4th ed., pp. 633–637. St. Louis: Mosby.
Current as of: December 20, 2019
Author: Healthwise Staff
Medical Review: Adam Husney, MD - Family Medicine
Brian O'Brien, MD, FRCPC - Internal Medicine
Kathleen Romito, MD - Family Medicine