A small papaya delivers more than a full day's vitamin C in a single sitting, and a cup of sliced fruit also contributes vitamin A that your eyes rely on.
But its most underappreciated asset may be papain, a protein-digesting enzyme the fruit produces on its own.
The Cleveland Clinic's dietitian team lays out the case in a health overview that groups papaya's benefits around vision, immunity, and gut function. Registered dietitian Julia Zumpano, RD, LD, walks through those effects and where the evidence is strongest.
What papain may do for digestion
Papain is a natural enzyme in papaya that helps break down protein, which is one reason the fruit has a long reputation as a digestive aid. The clearest human evidence is still fairly modest.
Also read: 7 back pain signs that point to inflammation, not a pulled muscle
In a 2013 double-blind, placebo-controlled trial, volunteers with chronic digestive complaints drank 20 ml of a concentrated papaya preparation, Caricol, or a placebo every day for 40 days.
Constipation and bloating improved to a statistically significant degree in the treatment group. Heartburn, another primary endpoint, did not reach significance because too few participants reported it.
That is one small trial of a specific extract, not proof that eating papaya cures indigestion. But it does line up with the fruit's traditional use, and a fresh, ripe papaya after a heavy meal is a low-risk way to test it against your own gut.
A cup a day
Papaya is a genuine vitamin C heavyweight. Cleveland Clinic notes that a small papaya carries about 95 milligrams of vitamin C, more than the recommended daily value for adults.
Also read: How eating cantaloupe regularly can affect your body
USDA-based nutrition data put one cup of fresh papaya cubes at close to 90 milligrams, essentially the full 90 mg RDA for adult men and above the 75 mg for adult women.
Vitamin C is not a cold cure, but its role in immunity is well documented. The National Institutes of Health notes it supports both innate and adaptive immunity, contributes to the growth of B cells and T cells, and helps maintain the epithelial barriers that keep pathogens out.
For most people the practical takeaway is simple. If a bowl of papaya is your morning fruit, you have already hit your vitamin C target before lunch.
Beta-carotene and your eyes
The third benefit sits in the color. A cup of sliced papaya contains roughly 68 micrograms of vitamin A activity, and the fruit also supplies beta-carotene, an orange pigment the body converts into vitamin A on demand.
Also read: How eating lemons every day can affect your kidneys, heart and blood pressure
Vitamin A is essential for vision because it forms part of rhodopsin, the light-sensitive pigment in the retina that lets you see in dim conditions.
Low vitamin A status shows up first as night blindness. Papaya will not sharpen 20/20 sight into 20/10, but as part of a mixed diet it adds to the carotenoid pool the retina draws on.
One caution worth knowing
Papaya contains natural latex, and Cleveland Clinic notes that people with a latex allergy can experience oral allergy syndrome after eating it.
If you know you react to latex gloves or balloons, treat papaya carefully and stop at the first sign of tingling or swelling. Anyone with a serious food allergy should raise it with their doctor before making the fruit a daily habit.
Also read: Fatty liver disease may affect 1 in 3 adults: 7 subtle clues doctors want you to know
For everyone else, a bowl of ripe papaya with breakfast is a straightforward way to check three separate boxes at once. Add a squeeze of lime to slow oxidation, and refrigerate cut fruit in a sealed container for up to three days.
Also read: 8 warning signs of ulcerative colitis most people confuse with IBS
This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.