Pomegranates that taste like alcohol have started to ferment. The sugars inside the fruit are being converted into ethanol by wild yeasts or by the fruit’s own internal chemistry, and the result is that sharp, boozy flavor you’re picking up. This can happen while the fruit is still on the tree, during storage, or after you’ve cut it open and left the arils out too long.
How Fermentation Happens Inside a Pomegranate
Pomegranate arils are packed with sugar, which makes them an ideal environment for fermentation. Wild yeasts naturally present on the fruit’s skin or in the air can colonize the juice through even a tiny crack in the rind. Once inside, these microbes feed on the sugars and produce ethanol as a byproduct. The same species of yeast used to make wine and beer, Saccharomyces cerevisiae, is one of the most common culprits, but other wild yeasts can do the job just as easily.
Fermentation doesn’t always require outside microbes, though. Pomegranates are living tissue, and their cells continue to respire after harvest. When oxygen levels drop, either because the fruit is sealed in a plastic bag, packed too tightly, or simply stored for too long, the cells shift from normal aerobic respiration to anaerobic respiration. This is the same emergency energy pathway that produces lactic acid in your muscles during intense exercise, except in fruit cells it produces ethanol instead. Research on postharvest pomegranate storage has confirmed that low-oxygen conditions cause a spike in ethanol accumulation inside the fruit, along with degraded flavor and off-putting tastes.
Why Storage Conditions Matter So Much
Temperature is the single biggest factor. Pomegranates store best at around 5°C (41°F) with high humidity (90 to 95 percent). At that temperature, they can last up to eight weeks without significant quality loss. For longer storage, bumping the temperature to about 7°C (45°F) helps avoid chilling injury, though mold becomes a bigger concern over time. Under controlled atmosphere conditions with carefully managed oxygen and carbon dioxide levels, commercial operations can keep pomegranates viable for up to six months.
At room temperature, the timeline compresses dramatically. Heat accelerates both yeast activity and the fruit’s own metabolic rate, so a pomegranate sitting on your kitchen counter in a warm room will ferment far faster than one in the fridge. Sealing pomegranates in airtight containers or plastic bags without ventilation can also push oxygen levels low enough to trigger that anaerobic switch, producing ethanol even without any yeast involvement.
How to Tell Before You Taste
A few signs can warn you before you bite into a fermented aril. Fresh pomegranate arils are plump, glossy, and bright red. If they look brownish, mushy, or translucent instead of jewel-like, fermentation or spoilage has likely begun. Shriveled, dry seeds indicate the fruit is simply old, but soft, leaking arils suggest active breakdown.
Smell is your most reliable tool. A fresh pomegranate has a mildly sweet, slightly tart scent. If you detect anything sharp, vinegary, or wine-like when you crack the fruit open, fermentation is underway. The rind itself can also give clues: soft spots, visible mold, or a spongy feel when you press on the skin all point to internal decay. A healthy pomegranate rind is tough, leathery, and firm.
Is It Safe to Eat?
A pomegranate with a faint alcohol taste from early-stage fermentation is unlikely to make you seriously ill, but it’s not a good idea to keep eating it. The same conditions that allow ethanol-producing yeasts to thrive also create a hospitable environment for mold and other spoilage organisms. Some molds that grow on fermenting fruit, including species of Aspergillus and Rhizopus, can produce harmful compounds. You can’t always see or taste these organisms, so a boozy flavor is a reliable signal to discard the fruit.
If only a small section of arils tastes off, it’s tempting to eat around it. The safer choice is to toss the whole fruit, since ethanol and microbial byproducts can migrate through the juice that connects the arils inside the rind.
Picking Pomegranates That Won’t Ferment Early
Choosing a good pomegranate at the store is your first line of defense. Look for three things: shape, skin, and weight. A ripe pomegranate has flattened, angular sides rather than a perfectly round shape. Those flat planes form as the arils inside swell with juice and press against each other. The skin should be smooth, firm, and free of soft spots or cracks, regardless of whether it’s light pink or deep crimson. Finally, pick it up. A ripe pomegranate feels heavy for its size, which means the arils are full of juice rather than dried out.
Once you get it home, store whole pomegranates in the refrigerator, not on the counter. They’ll keep for several weeks this way. If you’ve already removed the arils, store them in an airtight container in the fridge and use them within about five days. Freezing arils in a single layer on a baking sheet, then transferring them to a freezer bag, extends their life for months without any risk of fermentation.