Does Jung Kwan Jang GL Pro Core actually work? Ingredients, data and who it suits (Singapore 2026)

Short answer: For crashing by 2 or 3pm after lunch and craving sweets on a full stomach, Jung Kwan Jang GL Pro Core takes the right approach. It's a Korean red ginseng shot: 6-year Korean red ginseng KGC05pg (23 mg of ginsenosides Rg1 + Rb1 + Rg3 a bottle) with banaba leaf and bitter melon extracts. You drink one bottle after a meal, and it works on the blood sugar swing that meal brings. Manufacturer data says over 85% of Korean users reported a clear change within 4 weeks. It is a food, not a medicine, and it does not replace blood-sugar medication. Results vary, and it works best alongside balanced meals and exercise.

What are the key points?

• What it is: a Korean red ginseng shot. 25 ml a bottle, 21 bottles a box, so one box lasts 21 days. The label shows 0 g sugars and 5 kcal a bottle.
• How it works: one bottle after a meal, and the red ginseng, banaba leaf and bitter melon work alongside that meal.
• What data there is: two manufacturer figures and four label figures. Sources are listed below.
• Who it suits: adults who drink kopi, teh or sweet drinks most days, eat out with rice or noodles at most meals, get sleepy in the afternoon and crave sweets at night.
• Who it doesn't suit: anyone under 18. If you're pregnant or breastfeeding, on blood-sugar medicine or blood thinners, or have a kidney condition, ask your doctor first.

Why do you keep crashing in the afternoon?

What wipes out your 2 or 3pm and sends you looking for sweets at night usually isn't how much you ate. It's what your blood sugar does afterwards.

Rice, noodles, bread and sweet kopi hit your bloodstream fast, and your blood sugar shoots up. Your body rushes to bring it down and often overshoots. Spike, then dip: that's your afternoon slump, and the cravings that won't stop at night.

Cutting rice doesn't last, because eating out, tapau and hawker centres put rice and noodles in front of you every day. GL Pro Core doesn't ask you to give them up. Eat your meal, then drink one bottle.

How does the formula match your problem?

KGC05pg is recognised in Korea by the MFDS (Ministry of Food and Drug Safety) for blood sugar. That recognition is Korean. GL Pro Core is made in Daejeon, Korea by Korea Ginseng Corp., which has made red ginseng since 1899.

How should you read the data?

We split the data into two kinds and name the source for each.

Manufacturer data (Jung Kwan Jang / Korea Ginseng Corp.)

• Over 85% of Korean users reported a clear change within 4 weeks (user feedback in Korea)
• KGC05pg red ginseng went through a 12-week human study

Label (per 25 ml bottle)

• Ginsenosides Rg1 + Rb1 + Rg3: 23 mg
• Sugars: 0 g
• Energy: 5 kcal
• Allulose: 3 g

Manufacturer data tells you how Korean users did on average. It doesn't mean you will get the same result. Everyone's diet and body differ, and it works best alongside balanced meals and exercise.

How is it made, and what does the label say?

• Produced by Korea Ginseng Corp. to GMP, HACCP and ISO standards, traceable from farm to finished bottle
• No animal-derived ingredients and non-GMO, according to the brand
• Free from gluten, dairy, soy, eggs, fish, shellfish and peanuts, according to the brand
• Our current sources show no Halal certification

How do you tell if it suits you?

1. Look at your day: sweet kopi in the morning, a plate of rice at lunch, a crash at 2 or 3pm, sweet cravings at night. Three or more, and it's worth trying.
2. One bottle after a meal, every day: after lunch keeps the afternoon steadiest. Drinking it only when you remember makes it hard to judge.
3. Track three things: how alert you feel in the afternoon, whether you crave sweets at night, and your waist measurement once a week.
4. Use the guarantee: don't feel a genuine difference within 30 days? Message your advisor for a full refund.

Frequently asked questions

Can GL Pro Core replace my blood-sugar medicine?

No. GL Pro Core is not a medicine and does not replace prescribed medication. If you take medicine, ask your doctor before drinking it, and never stop your medicine on your own.

Why after a meal?

Because it works on the blood sugar that meal brings. Drink it once you've eaten and the red ginseng, banaba leaf and bitter melon work alongside the food. After lunch keeps the afternoon steadiest.

Does it contain sugar? Is it very sweet?

The label shows 0 g sugars and 5 kcal a bottle. The sweetness comes from allulose (3 g a bottle) and stevia, with a light fruity taste.

Will red ginseng make me feel heaty?

Most people find it gentle. Red ginseng is fresh ginseng that has been steamed, then dried, and Jung Kwan Jang describes it as warming, not heaty. You may notice a gentle warmth when you first start.

When will I feel something?

Most people first notice less of the after-lunch slump in weeks 1–2, fewer sweet cravings in weeks 3–4, and steadier post-meal blood sugar by weeks 8–12. Read more in how long GL Pro Core takes to work.

Buy or learn more

See the full ingredients, data sources and plans on the GL Pro Core product page. Still deciding? Ask an advisor on Messenger. No purchase needed.