--- title: "Red Pepper Flakes: Benefits, Uses & Side Effects | Herbadex" description: "Made by drying and crushing red chillies. Its capsaicin is used in effective nerve-pain creams; its effect in food is small." language: en url: https://herbadex.com/en/herb/red-pepper-flakes/ source: Herbadex (https://herbadex.com) --- [Spice](https://herbadex.com/en/form/spice/) # Red Pepper Flakes Capsicum annuum A Strong clinical evidence Made by drying and crushing red chillies. Its capsaicin is used in effective nerve-pain creams; its effect in food is small. [Metabolism, Weight & Blood Sugar](https://herbadex.com/en/for/metabolism/) [Joints, Bones & Pain](https://herbadex.com/en/for/joints-pain/) Image: Herbadex Botanik Stüdyosu · Özel Üretim Pregnancy **Generally safe** Breastfeeding **Caution** Children **Caution** Drug interactions **No recorded interactions** ## At a glance Red pepper flakes are coarsely ground dried hot red peppers (Capsicum annuum); their heat comes from capsaicin. Capsaicin skin creams and patches are medicines backed by clinical trials for nerve pain and musculoskeletal pain. Capsaicin in food has only a very small effect on energy expenditure and appetite. **Parts used:** fruits **Key constituents:** Capsaicin, Carotenoids (Capsanthin), Vitamin C & A Updated: October 15, 2026 ℹ Compiled from standard pharmacognosy references and clinical literature summaries where no formal EMA monograph exists. ## What is it used for? - C Laboratory / animal evidence In food, capsaicin may very slightly raise energy expenditure and fullness. \[1\] - A Strong clinical evidence Capsaicin medicinal creams and patches are backed by clinical trials for nerve and musculoskeletal pain (not the flakes themselves). \[1\] ## How is it used? ### Food Sprinkle on dishes, pizza, soups and salads. **Amount:** In cooking \[1\] ## Safety & interactions - Do not rub pepper flakes on skin; use only pharmacy capsaicin products for pain. - May worsen reflux, gastritis, ulcers and haemorrhoids. - Avoid contact with eyes; wash your hands. - Poorly stored product carries a mould toxin (aflatoxin) risk. \[1\] \[2\] ### Drug interactions No recorded interactions ### Side effects - Heartburn - Burning in the mouth and anus #### ⚕ When to see a doctor - If high fever, shortness of breath or purulent/bloody phlegm develops - If symptoms do not improve within 1–2 weeks or worsen - If severe abdominal pain, jaundice, rash or allergic reaction occurs ## Did you know? Birds do not feel capsaicin's heat, which is why they spread chilli seeds. \[1\] ## Frequently asked questions Do chilli flakes speed up metabolism? Capsaicin's effect is very small and not meaningful for weight loss. Do chilli flakes help pain? Not the flakes; pharmacy capsaicin creams are effective for nerve pain. Is chilli bad for the stomach? Moderate amounts are fine for healthy people; it may worsen reflux and gastritis. ## Sources 1. [ESCOP Monographs: The Scientific Foundation for Herbal Medicinal Products](https://escop.com/monographs/) ESCOP · 2019 2. [Trease and Evans Pharmacognosy (16th Edition)](https://www.sciencedirect.com/book/9780702029332/trease-and-evans-pharmacognosy) Elsevier Health Sciences · 2009 ### Cite This Page Red Pepper Flakes (Capsicum annuum). Herbadex — Doğal Şifa Rehberi (2026). https://herbadex.com/en/herb/red-pepper-flakes/ ## Related guides and comparisons - [How to Prepare Herbal Tea](https://herbadex.com/en/guide/how-to-prepare-herbal-tea/) - [How to Use Essential Oils Safely](https://herbadex.com/en/guide/essential-oil-safety/) - [Herbal Products and Drug Interactions](https://herbadex.com/en/guide/herb-drug-interactions/) ## On this page At a glance What is it used for? How is it used? Safety & interactions Did you know? Frequently asked questions Sources Related herbs ## Related herbs ### [Black Seed](https://herbadex.com/en/herb/black-seed/) B Limited clinical evidence Nigella sativa A spice seed for which small studies saw modest falls in blood sugar, cholesterol and blood pressure. Kitchen amounts are safe. 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