Even while traveling in Japan, Girls’ Generation’s Taeyeon cannot go without her favorite snack. In a recent video uploaded to her YouTube channel documenting an impromptu trip to Tokyo, Taeyeon returned to her lodging after a long day and reached for a bag of jelly candy. "I’m going to look back on today while eating jelly," she told her viewers.
Taeyeon’s love for the chewy treat is well-documented. In previous interviews, she has confessed, "My favorite snack is jelly," noting that she keeps stashes in her car and home to snack on whenever the craving strikes. However, while they are a fan-favorite comfort food, jelly candies can trigger sharp blood sugar spikes and significant dental issues if consumed without caution.
The Sugar Trap: Rapid Spikes and "Crash" Hunger
Jelly candy is essentially a concentrated blend of sugar and glucose syrup. Because it consists of simple carbohydrates with virtually no fiber, fat, or protein to buffer digestion, the body absorbs it almost instantly. This can lead to a "blood sugar spike," particularly if eaten on an empty stomach.
When blood sugar levels surge, the body compensates by releasing an excess of insulin. This often causes blood sugar to plummet shortly after, leading to intense "rebound hunger" and making overeating more likely. Over time, repeating this cycle can increase the risk of developing type 2 diabetes and contribute to weight gain.
How to enjoy jelly more safely:
Don't eat it alone: Having jelly right after a meal—or alongside nuts, yogurt, or boiled eggs—slows down sugar absorption.
Portion control: Instead of eating a large amount at once, divide the candy into smaller servings.
Post-snack movement: Avoid sitting down immediately after eating. A 10–15 minute walk helps your muscles utilize the glucose, tempering the spike.
Dental Danger: Worse for Cavities Than Chocolate
Jelly candy is notorious among dentists for its "stickiness factor." Its texture allows it to cling to tooth surfaces and wedge into the deep grooves of molars, making it difficult to wash away with saliva. Bacteria in the mouth then break down this sugar to produce acid, which erodes enamel and causes decay.
According to the Korean Dental Association, the "Food Cavity-Causing Index" for jelly candy is 48 points. This makes it significantly more damaging than several other common sweets:
Jelly Candy: 48
Caramel: 38
Cookies/Crackers: 27
Chocolate: 15
Soft Drinks: 10
To mitigate dental damage, it is better to finish the candy quickly rather than snacking on it slowly over several hours. Rinsing your mouth with water or brushing your teeth immediately after eating is the best way to prevent sugar from lingering on your enamel.
