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Bromelain is one of a group of proteolytic enzymes (enzymes capable of digesting protein). It is widely believed that most orally ingested enzymes are destroyed by the digestive juices prior to being absorbed. However, there is evidence that significant amounts of bromelain can be absorbed intact.
What does it do? Bromelain is one of a group of proteolytic enzymes (enzymes capable of digesting protein). It is widely believed that most orally ingested enzymes are destroyed by the digestive juices prior to being absorbed. However, there is evidence that significant amounts of bromelain can be absorbed intact. Proteolytic enzymes other than bromelain are often used with people who suffer from malabsorption. Although bromelain in combination with other enzymes and ox bile has been reported to help digest food it is generally not used for this purpose. However, bromelain does contribute to the digestion of protein, and may therefore be used as a digestive aid. Although many doctors assume that other proteolytic enzymes, such as those found in pancreatin, are more effective than bromelain in helping digestion and absorption, almost no research compares the relative effects of these enzymes.
Bromelain is an anti-inflammatory agent and for this reason is helpful in healing minor injuries, particularly sprains and strains, muscle injuries, and the pain, swelling, and tenderness that accompany sports injuries. Topically applied bromelain in the form of a cream may be beneficial for cleaning debris from burns and frostbite, possibly enhancing the rate of healing. This use of bromelain should be supervised by a doctor.
Also as a result of its anti-inflammatory effect, bromelain has been found to dramatically reduce postoperative swelling in controlled human research. Double-blind research has found bromelain effective in reducing swelling, bruising,and pain, for women having minor surgery in conjunction with giving birth (episiotomy).
The anti-inflammatory effect of bromelain is the probable reason this enzyme has been found effective for people suffering from sinusitis. Some of the evidence supporting bromelain in the treatment of sinusitis comes from double-blind research.
Bromelain, in combination with trypsin (another enzyme) may enhance the effect of antibiotics in people with a urinary tract infection. In a double-blind study, 100% of people who received bromelain/trypsin in combination with antibiotics had a resolution of their infection, compared to only 46% of those who received antibiotics alone.
Again, probably due to its anti-inflammatory action, bromelain was reported to help patients with rheumatoid arthritis in preliminary research. In that trial, in which bromelain was given for varying (3-week to 13-month) periods, 73% had good to excellent results.
Bromelain is a natural blood thinner because it prevents excessive blood platelet stickiness. This may explain, in part, the positive reports in a few clinical trials of bromelain to decrease symptoms of angina and thrombophlebitis. In addition, bromelain reduces the thickness of mucus, which may benefit patients with asthma or chronic bronchitis.
Preliminary evidence in both animals and people suggests that bromelain may possess antitumor activity, though the true importance of this effect is poorly understood.
Bromelain can induce beneficial changes in white blood cells with possible effects on immune function. However, whether these effects would help people with immune system problems remains unclear.
Where is it found? Bromelain is found mostly in the stems of pineapples and is available as a dietary supplement.
Bromelain has been used in connection with the following conditions (refer to the individual health concern for complete information):
Health Concerns
Sinusitis
Wound healing
Post-surgical healing
Prostatitis (NBP, PD)
Sprains and strains
Tendinitis
Urinary tract infection
Angina
Asthma
Low back pain
Rheumatoid arthritis
Thrombophlebitis
Reliable and relatively consistent scientific data showing a substantial health benefit.
Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
An herb is primarily supported by traditional use, or the herb or supplement has little scientific support and/or minimal health benefit.
Who is likely to be deficient? Since bromelain is not essential, deficiencies of this plant-based enzyme do not exist.
How much is usually taken? Assessing the right amount of bromelain to take is complicated. Most bromelain research was conducted years ago, when amounts used were listed in units of activity that no longer exist. These old units do not precisely convert to new ones. Today, bromelain is measured in MCUs (milk clotting units) or GDUs (gelatin dissolving units). One GDU equals approximately 1.5 MCU. Strong products contain at least 2,000 MCU (1,200–1,333 GDU) per gram (1,000 mg). A supplement containing 500 mg labeled "2,000 MCU per gram" would have 1,000 MCU of activity. Some doctors recommend as much as 3,000 MCU taken three times per day for several days, followed by 2,000 MCU three times per day. Much of the research uses smaller amounts, more like the equivalent of approximately 500 MCU taken four times per day. However, most of the bromelain used in the studies was enteric-coated in order to prevent it from being destroyed by gastric juice. It is likely, therefore, that currently available bromelain preparations (which typically are not enteric-coated) are of lower potency than the bromelain used in most studies.
Are there any side effects or interactions? Bromelain is generally safe and free of side effects when taken in moderate amounts. However, one preliminary report indicates increased heart rate with the use of bromelain. In addition, some people are allergic to bromelain. Because bromelain acts as a blood thinner and little is known about how bromelain interacts with blood-thinning drugs, people should avoid combining such drugs with bromelain in order to reduce the theoretical risk of excessive bleeding.
Are there any drug interactions? Certain medications may interact with bromelain. Refer to the drug interactions safety check for a list of those medications.
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