Educational information, not medical advice — ask your doctor or midwife.
Piña is the pineapple, the fruit of Ananas comosus. It is a sweet tropical fruit eaten fresh, juiced, dried or cooked. In Latin American home medicine it was also used for coughs, heavy stomachs and swelling.
The fruit gives vitamin C, manganese, fibre and water. Its stem and juice also hold bromelain, a group of enzymes that break down protein. Almost all of the research is on bromelain pills, not on eating the fruit.
Here is the short verdict. As a food, pineapple is safe and healthy for most people.
As a remedy, bromelain shows small and mixed results for swelling after surgery and for knee pain. Long use in a tradition is not proof that a remedy works, and it is not proof that it is safe.
The fruit mostly works as food. It supplies water, fibre, fruit sugars and vitamin C.
Bromelain is the part credited with medicine-like effects. In test tubes it breaks down protein, including fibrin, a protein that helps form clots. In cell and animal studies it appears to lower some markers of swelling.
Whether this happens in your body at useful levels is not settled. Small human studies suggest some bromelain does pass from the gut into the blood. The amounts are low, and products differ a lot in strength.
One effect is plain and real. The enzymes break down meat protein, which is why pineapple tenderises meat. The same action makes fresh fruit sting a sore mouth, and that is chemistry, not a health benefit.
Most people meet piña as food. The common forms are:
- Fresh fruit, whole or cut - Fresh or bottled juice - Canned rings and chunks in syrup or juice - Dried rings and sweetened chunks - Peel and core boiled into a home drink, often with cinnamon - Bromelain capsules and tablets, sold as supplements - Bromelain creams and gels, used on skin in some countries
Fresh fruit and fresh juice keep the most active enzyme. Supplements vary widely between brands, even at the same milligram figure.
Pineapple came from South America, near what is now Brazil and Paraguay. Indigenous farmers grew it long before Europeans met it in 1493. Ships then carried it across the tropics.
In Latin American households, hot drinks made from the peel were given for coughs, colds and fever. Juice was taken for sore throat and for a heavy, blocked feeling after rich food. Mashed peel or leaf was laid on bruises, boils and swollen joints.
Bromelain was first pulled from the plant in the 1890s. Doctors began studying it as a medicine in the 1950s, mainly in Europe.
Call emergency services now if your lips, tongue or throat swell, or if you get hives, wheezing or trouble breathing after eating pineapple or taking bromelain. That can be a severe allergic reaction.
Stop and see a doctor if you notice:
- Unusual bruising, nosebleeds or bleeding gums - Heavier than normal menstrual bleeding - Diarrhoea or vomiting lasting more than two days - Severe mouth pain, blistering or peeling - Swelling, pain or a wound that is getting worse, not better
See a doctor before starting bromelain capsules if you take prescription medicines, are pregnant, or have surgery booked.
Pineapple is an ordinary food everywhere. Bromelain is sold as a dietary supplement in the United States and as a food supplement in the United Kingdom and European Union. In Germany, bromelain is also licensed as a medicine for swelling after surgery or injury.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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