Capsaicin is a crystalline chemical component that was originally isolated from chilli peppers in 1878. Capsaicin was soon identified to induce a burning sensation in the mucous membranes. In addition, it enhanced stomach acid output and activated cutaneous nerve endings.

Capsaicin Supplements: Benefits, Dosage, and Side Effects

When ingested, capsaicin, a chemical found in spicy peppers, creates a burning sensation. It’s also used as a supplement.

The most well-known advantage of capsaicin is its ability to aid weight or fat reduction.
Your metabolism, which is the process of breaking down what you eat and drink into energy for your body to utilize in its daily tasks, is extremely important to your weight.
Capsaicin pills may increase your metabolism, allowing you to lose weight and burn fat more quickly.

Pharmaceutical uses of capsaicin

Properties of capsaicin and its utility in veterinary and human medicine -  ScienceDirect

Capsaicin is a pain reliever found in topical ointments and dermal patches in doses ranging from 0.025 percent to 0.1 percent. It is used in cream form for the temporary alleviation of minor muscular and joint aches and pains caused by arthritis, backache, strains, and sprains, and is frequently combined with other rubefacients.

It’s also used to treat peripheral neuropathy symptoms including shingles-induced post-herpetic neuralgia (a sharp, shocking pain that follows the path of a nerve and is due to irritation or damage to the nerve). Capsaicin which is said to causes peptic ulcers a myth. Capsaicin is benefactor of ulcer rather than being a cause of it. It inhibits growth of H. Pylori in vitro.

Uses in food

Capsaicin is widely employed in culinary items to add spice or “hot” (piquancy), generally in the form of spices like chilli powder and paprika. In high quantities, capsaicin will also induce a burning effect on other sensitive regions, such as skin or eyes.