Actress Lee Jung-eun has revealed that muk -- a traditional Korean jelly made from acorns or beans -- is one of her go-to foods for dieting.
During a recent variety show appearance with Jeong Ryeo-won, Jun Hyun-moo, and YouTuber Kwak Tube, Lee shared a meal featuring muk dishes. "I've actually tried a 'muk diet' before," she said. Kwak responded with surprise, saying, "You look so much slimmer in person -- I thought you had lost weight for a patient role this time."
Lee previously drew attention in December 2023 when she revealed that she had lost more than 10 kilograms (22 pounds) while preparing for her next project after finishing the drama "Daily Dose of Sunshine." Her remark sparked curiosity about the health benefits of muk, the food she credits for her weight loss.
Low-calorie and protein-rich acorn jelly
Muk is made by thickening and solidifying starch from ingredients such as acorns, mung beans, or buckwheat. Because of its low calorie content, it is widely used as a diet food. According to Korea's national standard food composition table, acorn jelly contains only 47 calories per 100 grams.
Rich in protein, acorn jelly helps slow the synthesis of body fat and supports weight management. It is also high in potassium, which aids in removing sodium and waste from the body. Acorns contain aconic acid, a compound that helps absorb and expel heavy metals and toxins. In fact, one kilogram of acorn powder can reportedly purify about 3.5 tons of wastewater. The Korea Institute of Energy Research found that aconic acid reduced heavy metal concentrations in wastewater to one two-hundredth of their original levels.
Anti-aging benefits, but constipation risk
Beyond dieting, acorn jelly offers anti-aging benefits. Its polyphenols and tannins are antioxidants that remove free radicals -- unstable molecules that can damage cells and lead to inflammation, aging, and even cancer. Tannins also help reduce inflammation and prevent infections.
However, excessive tannin intake can worsen constipation. While tannins can help stop diarrhea by reducing water absorption in the intestines, too much of them can inhibit bowel movements. People who already experience constipation should therefore be cautious about consuming acorn jelly.
Relying solely on muk for dieting can also lead to nutrient deficiencies. Experts say acorn jelly should be eaten in moderation as part of a balanced diet that includes water, fiber, vegetables, and fruits. These provide essential vitamins, improve satiety, and supply the body with high-quality nutrients.