Kim Sejeong Lost 5kg in 23 Days: Here's the Diet She Still Follows

Kim Sejeong posted a set of new profile photos to her Instagram on May 31, captioning them simply "new 프로필" (new profile), and the images drew immediate attention for her toned, lean physique. The timing adds an extra layer of interest: she was recently cast in Yeogoosaeng Hwanghu (High School Empress), a Tving original drama, and has been keeping an active public presence as the production gears up.

In the photos, Sejeong poses in a white top and jeans against a professional-shoot backdrop, looking relaxed and confident in front of the camera.

The post sent fans back to her previously shared diet details, which became a talking point when she lost 5kg in 23 days. That figure is specific enough to stick, and it came with a method rather than a vague lifestyle claim.

Her routine started first thing in the morning: a glass of lukewarm water on an empty stomach to rehydrate after sleep, followed by a breakfast of Greek yogurt and apple. The combination was deliberate, fiber and protein together extend satiety, which helps reduce snacking pressure later in the day. When hunger hit between meals, she reached for water rather than food, working on the principle that the body often reads mild dehydration as hunger rather than thirst.

The most practical part of her approach involves substitution rather than elimination. Instead of cutting noodle dishes entirely, she swapped regular pasta and noodles for miyeok guksu (seaweed noodles) or konjac noodles, both of which carry far fewer calories and carbohydrates than wheat-based alternatives. Tofu replaced refined carbohydrates as a go-to ingredient, supplying protein while keeping calorie counts manageable.

Sejeong has long been known among fans for maintaining a consistently toned build, and this kind of disciplined, substitute-heavy approach helps explain why. With a new drama role on the horizon and fresh profile material already out, her wellness habits are likely to stay in the conversation for a while.