Enzymes: The Hidden Superheroes Doing Your Body's Work

Watch a coconut seller on a hot afternoon. Knife up, three strokes, straw in, hand it over, next coconut. He never looks tired, his knife never gets smaller, and he has never once tried to open a jackfruit.

Now, think about it. A coconut left alone on the roadside will also open one day. Rain, sun, time, gravity. But who is waiting that long for a drink?

Your body has the same problem, only a million times bigger. And it has solved it with trillions of little coconut sellers we almost never talk about. We call them enzymes.

What exactly is an enzyme?

An enzyme is a tiny worker, usually a protein, that makes one specific chemical change happen very fast inside the body, at normal body temperature, without being used up. Digesting food, making energy, building DNA and clearing carbon dioxide all depend on enzymes doing their one job, again and again.

How fast is "very fast"? Here is my favourite example. One step in making the building blocks of your DNA, left to itself in water, would take about 78 million years to get even half done. With its enzyme, it takes around 18 milliseconds. That is a speed-up of roughly 10¹⁷ times¹, and chemists who study it still call it one of the most proficient enzymes known².

Seventy-eight million years, reduced to the blink of an eye. And you thought your internet was fast.

They don't do the work. They make the work possible.

Every chemical reaction has a hill to climb before it can happen. Scientists call it activation energy. Without an enzyme, molecules must struggle up and over that hill, and most of them simply give up.

An enzyme does not carry anyone over the hill. It builds a tunnel through it. The starting point is the same, the destination is the same, the energy difference between them is the same. Only the effort changes.

And each tunnel is made for one kind of traveller. Lactase splits milk sugar, but ignores table sugar, which has its own enzyme. The fit is less like a key in a lock and more like a firm handshake: the enzyme's pocket closes around exactly the right molecule, changes it, lets it go, and waits for the next one.

Enzymes don't do the work of life. They make the work of life possible.

Even superheroes need sidekicks

Here is where our plate enters the story. Many enzymes cannot work alone. They need a small helper called a cofactor, and most of these helpers come from food. Several B vitamins are turned into exactly such helpers. Magnesium alone is needed by more than 300 enzyme systems³. Zinc and iron sit inside many more.

And the enzymes themselves are built from protein. So when someone's diet is mostly refined cereal with very little dal, curd, eggs, fish or greens, the workforce is not on strike. It is simply short of tools.

We love to say, "My metabolism is slow." Your enzymes may want to reply, "Boss, we are ready. You just sent us to work without our spanners."

Why you and milk may have quietly parted ways

Almost every baby makes plenty of lactase, the enzyme that digests milk sugar. In most people it falls after childhood. That is why many Indian adults get bloating, gas or loose motions after a glass of milk, even though they drank it happily as children. It is common, and it is not an allergy.

In one Indian genetic study, about 81% of participants carried the "lactase non-persistent" pattern⁴, though this varies by region and the gene is not the whole story. Many such people still manage small amounts of milk comfortably, and curd or buttermilk usually sits better, because the bacteria have already digested part of the lactose for you. The cow is not the villain. The dose is.

What your "liver enzymes" report is really saying

Say, for example, a 40-year-old opens a health check-up report and sees "ALT: high" in bold. Panic follows. But enzymes like ALT and AST mostly live inside liver cells. When some of those cells are stressed or injured, the enzymes leak into the blood and the number rises.

So the test is less a report card of how well your liver works and more a leak detector. Often the cause is fatty liver, alcohol or a medicine. It is a reason for a proper conversation with your doctor, not for fear, and not for a detox tea.

Do you need enzyme supplements or pineapple after meals?

For most healthy people, no. Your mouth, stomach, pancreas and intestine already make the digestive enzymes you need. There is little evidence that over-the-counter enzyme supplements help most people, and no real evidence that enzyme-rich fruits improve digestion. Prescribed enzymes do help specific medical conditions.

Johns Hopkins experts note there is no real evidence that foods like pineapple help digestion⁵, and Harvard points out little evidence that enzyme supplements help most people⁶. Enjoy the pineapple. It is a lovely fruit. It is just not your digestive system's contractor.

Your pancreas may want to say, "Sir, I have been doing this since the day you were born. Please ask me before you hire outside help." The real exceptions are important, though. People whose pancreas cannot make enough enzymes, after long-standing pancreatitis for example, genuinely need prescribed enzyme capsules with meals. That is medicine, guided by a doctor, not a wellness trend.

Some people are also born short of a particular enzyme. G6PD deficiency, for instance, affects up to about 8.5% of people in India⁷ depending on the region, and certain medicines or fava beans can then harm their red blood cells. One enzyme, one gap, and the advice changes.

So the next time you finish a meal and go about your day, remember that trillions of tiny workers have quietly started their shift. They ask for very little: enough protein, a colourful plate, fewer insults from alcohol, and a doctor's attention when something feels off.

Where there's a will, there's an enzyme. And where there's an enzyme, there's a tool it borrowed from your plate.

This week, try one small experiment. Look at your plate and ask: did I send my workers to work with their tools today? Then come and witness what a well-fed workforce can do.

Educational information only, not diagnosis, treatment or emergency care. Please speak to a qualified doctor before changing medicines, diet or treatment.