What is bromelain and why is it in a recovery formula?.
A protein-digesting enzyme from pineapple stems, used around contact sport since the 1960s. What it is, why GDU matters more than milligrams, what the research says and how to take it.
Bromelain is a mixture of enzymes extracted from pineapple stems. It has been used around contact sport, and in European clinical practice, for decades in relation to bruising and swelling after knocks and after surgery. The research is older and smaller than for creatine or tart cherry, but it is consistent enough that bromelain sits in most serious recovery formulas built for combat athletes. Here is what it is, what the evidence says, and how to take it.
- Bromelain is a protein-digesting enzyme from pineapple. Quality is measured in enzyme activity, usually GDU per gram, not just milligrams.
- The research interest is in soft-tissue recovery: bruising, swelling and stiffness after impact.
- Typical doses in studies: 200 to 1,000mg a day of a 2,000+ GDU/g material, taken between meals.
- It is permitted in sport and appears on no prohibited list.
What is bromelain and where does it come from?
Bromelain is extracted from the stem of the pineapple plant, not the fruit you eat. It is a protease, an enzyme that breaks down protein, which is why fresh pineapple tenderises meat and makes your tongue tingle. In supplement form it is a standardised powder, and the important number on the label is its activity, expressed in gelatin digesting units (GDU) per gram. A 500mg dose of a 2,400 GDU/g material is a very different thing from 500mg of a 500 GDU/g one.
is the activity of the bromelain in Reset, at 500mg per scoop. If a label gives a milligram figure with no GDU, you have no idea how much enzyme you are getting.
What does the research say?
The oldest studies are from the 1960s in boxers, where bromelain was compared with placebo for the clearing of bruises after bouts. Results favoured bromelain. The studies are old and small, but they are the reason it entered combat sport.
A number of trials, mostly European, have looked at swelling and bruising after procedures. Reviews generally find a modest benefit for swelling and stiffness compared with placebo.
Small studies of bromelain, sometimes combined with other enzymes, around eccentric exercise found less soreness and better retention of muscle function in some, and no difference in others. The evidence is mixed but leans positive.
A reasonable question is whether an enzyme survives the gut. Studies have found bromelain does reach the blood intact in measurable amounts, which is why the oral research exists at all.
How do you take bromelain?
The research protocols mostly dosed it away from meals, on the logic that an enzyme taken with food gets used up digesting the food. In practice, a post-training scoop 30 to 60 minutes before you eat, or a before-bed scoop, fits that well. Doses in the trials ranged from a few hundred milligrams to over a gram a day of high-activity material, for several days to a few weeks. It is not a one-off; like the rest of Reset, it works better as a daily habit through camp.
Reset carries 500mg of 2,400 GDU/g bromelain in every scoop, alongside 10g of essential aminos, 10g of collagen, tart cherry, a phytosome curcumin, boswellia, ginger, magnesium, zinc and vitamins C and D3. One scoop within the hour after training or before bed. Enzyme activity is checked to be retained through blending and shelf life, because a dead enzyme is just powder.
Bromelain can increase the effect of blood-thinning medication and some antibiotics. If you take anticoagulants, or have a pineapple allergy, talk to your GP before using anything containing it. Stop it a couple of weeks before any planned surgery unless your surgeon says otherwise.
Old research, small studies, consistent direction. That is bromelain.
Can I just eat pineapple?
The fruit has some bromelain but far less than the stem, and the doses in the research would take a lot of pineapple. It is a good food, not a supplement dose.
Is bromelain banned in sport?
No. It is a food enzyme and appears on no prohibited list.
Does bromelain break down the collagen in the same scoop?
Not meaningfully in a mixed drink that is consumed in minutes. The collagen is already hydrolysed into small peptides, and the enzyme needs time and conditions it does not get in a shaker.
Flow State before. Reset after.
A stim-free pre and the martial arts recovery formula, built for people who train every day and get tested. Full doses, every one on the label, nothing from the WADA Prohibited List.
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