Bromelain is destroyed by canning. Only fresh pineapple carries it.
One cup covers more than a day's manganese, a mineral few people track and most need for bone.
The enzyme is why pineapple after a lamb dinner is more than a habit.
Ānānās is new to the Persian table and arrived through the imported-fruit market rather than through any orchard. It is worth knowing for bromelain, a group of protein-digesting enzymes in the fresh flesh and stem with a real clinical record for swelling and for helping a heavy meal down.
Known to botanists as Ananas comosus.
Chapter 2 of 14
Why It Matters
Very few things in a fruit bowl have trial evidence behind them. Bromelain does, for post-surgical swelling and for sinus congestion, and it comes free with a fruit people enjoy anyway.
Digestion of protein slows with age, and older adults are often told to eat more protein at the same time. Fresh pineapple after a meat meal is a small, pleasant help. The manganese contribution to bone is worth having as well.
It was used: trials in dental and general surgery found less swelling and pain with oral bromelain. Manganese in one cup exceeds the daily requirement, which matters for bone and for enzyme function.
Vitamin C at close to a full day's need in a cup.
Chapter 3 of 14
How It Is Traditionally Used
Persian temperament: Warm & Moist (1st degree). Warming and digestive. The effect belongs to fresh fruit only.
Modern Persian herbalism, which had to place a new fruit somewhere, reads ānānās as warm and moist: digestive, opening, and supportive after rich food. The insistence on fresh over tinned is one point where the traditional reading and the laboratory agree exactly.
Pineapple reached Iran through twentieth-century import trade.
Chapter 4 of 14
How It Is Traditionally Used: In the Household
Bromelain was isolated in the nineteenth century and has been sold as a digestive preparation since the 1950s.
The fruit entered Persian home use first as a tinned dessert, later as fresh fruit once air freight made it possible.
Pineapple appears at modern Iranian celebrations on the fruit platter, cut into rings, next to the melon and the grapes. It signals a well-stocked table more than it signals tradition.
Chapter 5 of 14
What It Contains
Primary compounds
Bromelain, a mixture of protein-digesting enzymes concentrated in the stem and core. Manganese, unusually high for a fruit; ferulic acid and vitamin C as the main antioxidants.
Vitamins
Vitamin B6, Folate, Thiamin
Other notable constituents
Minerals: Copper, Potassium · Fiber: About 2.3 g per cup
Chapter 6 of 14
In the Laboratory
From laboratory work, not from people taking it
Bromelain breaks down protein, which is measurable in a test tube and noticeable after a heavy dinner.
Chapter 7 of 14
What Studies in People Show
Early research
Bromelain preparations improved symptoms in acute sinusitis alongside standard care. Rated: early research. Bromelain eased knee pain and stiffness in small trials of mild osteoarthritis.Emerging evidence
Chapter 8 of 14
Preparation and Kitchen Use
Fresh slices after a heavy meat meal, which is when the enzyme has something to work on.
Cut off the top and base, stand it up, and cut the skin away in strips.
Dig out the brown eyes with the tip of a knife rather than cutting deep.
The core is edible and holds the most bromelain, though it's tough; chop it fine.
A ripe fruit smells sweet at the base and gives slightly when pressed.
Grill thick slices briefly and serve with cardamom cream.
Cubes in a salsa with cucumber and lime, served beside grilled fish.
Chapter 9 of 14
What It Goes With
Herb:
Mint
Torn over cut pineapple. It lifts the sweetness and cools the sharpness.
Fruit:
Lime
A squeeze before serving stops the fruit tasting flat.
Spice:
Cardamom
Over grilled slices, with a spoon of thick cream.
Dairy:
Yogurt
Eat them together rather than blended; the enzyme thins a smoothie within minutes.
Chapter 10 of 14
Who Should Be Careful
General caution:
The enzyme works on the mouth too. A lot of fresh pineapple leaves the tongue raw; rinse with water afterwards.
General caution:
Bromelain thins the blood mildly. Keep amounts ordinary in the two weeks before an operation.
General caution:
Tinned pineapple has no bromelain left. It is a sweet fruit and nothing more.
General caution:
Very unripe fruit is harsh on the stomach and on the mouth.
Chapter 11 of 14
Medicines and Interactions
General cautions
Medication interaction:
Large amounts or bromelain supplements within two weeks of surgery.
Specific medicines
Medication interaction:
Warfarin and other blood thinners — Bromelain has a mild blood-thinning action. Ordinary portions are fine; keep them steady and mention supplements to your clinic. (low concern)
Medication interaction:
Antibiotics (amoxicillin, tetracycline) — Bromelain can raise blood levels of some antibiotics. Space large amounts away from the dose. (low concern)
Chapter 12 of 14
Pregnancy, Children and Older Adults
Pregnancy and breastfeeding
Pregnancy and breastfeeding:
Ordinary portions of fresh pineapple are fine in pregnancy. The old story about it bringing on labour comes from concentrated bromelain, not from a slice of fruit.
Children
Children:
Children often complain that pineapple stings. That is the enzyme on a small mouth. Serve less, and with yogurt.
Older adults
Older adults:
Cut it into small pieces and take the core out; the core is fibrous and hard on dentures even when the flesh is soft.
Chapter 13 of 14
Through the Year
Spring:
Spring
Imported fruit is at its best in the spring months. Choose by smell.
Summer:
Summer
Cold pineapple with mint is one of the better answers to a hot evening.
Autumn:
Autumn
Good with grilled food while the weather still allows cooking outside.
Winter:
Winter
Available but expensive, and often picked too green to sweeten.
Chapter 14 of 14
Questions People Ask
Why does my mouth sting?
Bromelain is digesting a little of the surface of your tongue. It is harmless and it stops. Rinsing with water or eating yogurt after helps.
Is tinned pineapple as good?
No. Heat destroys bromelain, so the tin gives you sugar, some vitamin C, and none of the reason to eat it.
Should I eat the core?
If you can manage it. It holds the most enzyme. Chop it small or blend it into a drink.
Does pineapple burn fat?
No. The enzyme digests protein in the gut, which is a different thing entirely.
