Korean pear juice comes from Pyrus pyrifolia, a crisp Asian pear cultivated for thousands of years across Korea, Japan, and China. Unlike Western pears, Korean pears are notably juicy, mildly sweet, and rich in a distinctive set of plant compounds. In Korean culture, the juice has been a go-to remedy for hangovers and sore throats long before scientists started studying why it works.

The juice appears to help the body break down alcohol faster by supporting two key liver enzymes — alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) — that process alcohol and its toxic breakdown product, acetaldehyde. Less acetaldehyde building up in the blood means fewer hangover symptoms. The juice's natural sugars (especially fructose) also help fuel the liver through this detox process, and its antioxidant compounds help reduce the oxidative stress alcohol creates.

Fresh-pressed Korean pear juice is the most potent form and what most research has used. Bottled Korean pear juice is widely available and convenient. Concentrated extracts exist but vary in standardization. Eating the whole fruit provides fiber benefits fresh juice lacks. For hangover prevention, juice (roughly 220 ml) taken before drinking is the studied approach.

• Hangover prevention and recovery
• Alcohol metabolism support
• Digestive discomfort and bloating
• Liver enzyme support
• Sore throat and throat irritation
• Constipation (mild)
• Oxidative stress after alcohol
• Blood sugar balance support

• Hangover symptom severity (when consumed before drinking)
• Acetaldehyde accumulation during alcohol metabolism

• Korean pear (Pyrus pyrifolia) — whole fruit — The direct source of all the active compounds, with the added benefit of full fiber content that juice alone doesn't deliver.
• Bartlett / European pear — Contains similar flavonoids, chlorogenic acid, and pectin as Korean pear, though with somewhat different ratios. A good everyday alternative when Korean pears aren't available.
• Apple (with skin) — Rich in chlorogenic acid and pectin — the same two key compounds in Korean pear — making it a solid substitute for the antioxidant and digestive benefits.
• Coffee (brewed) — One of the richest dietary sources of chlorogenic acid, the primary antioxidant in Korean pear juice. Relevant for the oxidative-stress-reduction and liver-support mechanisms.
• Blueberries — High in anthocyanins and flavonoids that support liver health and reduce oxidative stress through similar pathways as Korean pear's active compounds.

• Recommended daily: 220 ml (about 1 cup / 7-8 oz) of fresh or 100% bottled Korean pear juice for hangover prevention; up to 2 cups daily for general digestive and antioxidant benefits
• Best time of day: For hangover prevention: drink before or at the start of alcohol consumption. For digestive support: morning or with meals works well.
• With or without food: Can be taken on its own or with food. For hangover prevention, drink it before food or alongside a light meal before going out.
• Time to effect: Hangover prevention: effects begin within 30-60 minutes of consumption; digestive benefits: days to weeks with regular use
• How long to take it: Safe for daily long-term use as a functional food. No cycling required. People with fructose intolerance or IBS-related sorbitol sensitivity should limit intake.