When to take Cayenne Pepper
Also known as Capsicum, Capsicum annuum, capsaicin, red pepper
No study shows a best time of day for cayenne, so take it at the same time each day. Capsaicin, the compound that makes it hot, can cause stomach upset or a burning feeling in some people.
Last reviewed October 13, 2026
Timing
| Best time | Any time of day |
|---|---|
| Food | With or without food |
| Fat-soluble | No |
- Any time; consistency matters more than timing.
- Capsule trials gave cayenne or its compounds daily for 4 to 12 weeks.
Check with your doctor first if…
- Blood thinners: capsicum may raise the risk of bleeding. Use caution and ask your doctor if you take anticoagulant or antiplatelet medicine.
- Nightshade allergy: people allergic to plants like potatoes, tomatoes or paprika can react to cayenne too.
- Breastfeeding: skin rashes have been reported in breastfed babies whose mothers ate foods spiced with red pepper.
- Stomach: capsaicin can cause a burning feeling and stomach side effects. Trials reported upset stomach, diarrhea and a hot feeling in the mouth.
- Capsaicin cream: do not apply it to the breast or any skin a baby might touch.
Amounts studied
Capsule trials used about 1–1.25 g of red pepper a day, 2–5 mg of capsaicin-type compounds, or 3–9 mg of non-spicy capsinoids, for 4 to 12 weeks.
Follow the serving size on your product’s label.
What the research says
| Area | Evidence | Summary |
|---|---|---|
| Metabolism and appetite | Limited | Capsaicin and its non-spicy cousin capsiate slightly raise calories burned and fat burning, and may curb appetite. The effect is small and most studies were short.[1] |
| Healthy cholesterol levels | Limited | A review of 11 trials (609 adults) found a small change in LDL cholesterol and a borderline effect on body weight. The authors say larger, better trials are needed.[2] |
Questions
Should I take cayenne in the morning or at night?
No studies compare times of day. Take it when you will remember it each day.
Does cayenne boost metabolism?
A little. Reviews found capsaicin slightly raises calories burned and may reduce appetite, but the effect is small and most studies were short.
Can I take cayenne with blood thinners?
Ask your doctor first. LactMed notes capsicum may raise bleeding risk and should be used with caution with anticoagulant or antiplatelet medicine.
Can I take cayenne every day?
Capsule trials gave it daily for 4 to 12 weeks with no serious side effects reported. Some people had upset stomach, diarrhea or a burning feeling.
Plan your whole routine
Add Cayenne Pepper and everything else you take to the planner to see your morning, midday and evening, and what to keep apart.
Open the plannerFrom AT2A
Sources
- The effects of capsaicin and capsiate on energy balance: critical review and meta-analyses of studies in humans (Chem Senses 2012), PubMed Central (accessed October 13, 2026)
- Effects of Capsicum annuum supplementation on the components of metabolic syndrome: a systematic review and meta-analysis (Sci Rep 2020), PubMed Central (accessed October 13, 2026)
- Capsicum (Drugs and Lactation Database, LactMed), NIH National Library of Medicine (accessed October 13, 2026)
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. It is general information, not medical advice: talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding, take medicine or have a health condition.