Raw Rehmannia
Korean (GAP-certified)We use Korean raw rehmannia processed with 9-steam-9-dry. Raw rehmannia replenishes fluids (津液), regulates water metabolism, and reinforces Kidney Yin (陰) to fundamentally relieve dryness.
A tonic that restores a dry body.
Raw rehmannia, ginseng, white poria, and honey — brewed with 72 hours of care
to bring moisture to the lungs and kidneys.
Raw rehmannia, ginseng, white poria, and honey — brewed with 72 hours of care
to bring moisture to the lungs and kidneys.
Gyeongokgo (瓊玉膏)
We Recommend Gyeongokgo to These People
If even one applies to you, Gyeongokgo may be the answer.
😮💨
Dry Cough Type
Your throat is often dry
and a dry cough won't let up.
Lung fluids (津液) are insufficient and the lung mucosa is dry. Gyeongokgo moistens the lungs and fundamentally relieves coughing.
🌸
Dry Skin · Menopausal Type
Your skin is rough and dry
and menopausal symptoms are severe.
Kidney Yin (腎陰) deficiency leaves skin and mucosa dry with disrupted hormones. Gyeongokgo replenishes Yin (陰).
🍃
Frail Constitution Type
Thin and weak with poor stamina,
easily exhausted and often ill.
Qi-Yin Dual Deficiency (氣陰兩虛) — both energy and fluids are lacking. Gyeongokgo replenishes both simultaneously.
🌅
Recovery · Restoration Type
You want to gradually regain strength
after a major illness.
Damaged fluids and energy must be replenished slowly post-illness. Gyeongokgo's gentle tonic action supports steady recovery.
Why Gyeongokgo?
A classic formula that fills a dry, parched body with moisture.
1
Signals of Dryness
If your skin cracks, your cough persists, and your mouth keeps drying out — this is not a skin issue. It is a sign that fluids (津液) are low.
2
The Wisdom of Paste Form
Gyeongokgo is a thick paste (膏) tonic. Taken slowly, it lingers in the stomach and deeply absorbs.
3
Lung and Kidney Support
Dry lungs cause coughing; weak kidneys dry bones and skin. Gyeongokgo is the unique formula that moistens both the lungs and kidneys.
Geum Maek Gyeongokgo As of March 2026
- Cumulative Prescriptions
- 0 +Cumulative Prescriptions
Gyeongokgo prescriptions since opening
- Dryness Relief
- 0 %Dryness Relief
Survey after 8 weeks of use
- Lung Function Improvement
- 0 %Lung Function Improvement
Rate of improvement in respiratory symptoms
- Prescription History
- 0 years+Prescription History
Since the Donguibogam record
How Does Gyeongokgo Work?
The moistening-tonifying (潤補) principle of four herbs
💧
Raw Rehmannia — Replenishes Fluids
Catalpol and rehmannin
regulate water metabolism
and replenish Kidney Yin (陰),
restoring body moisture.
🌱
Ginseng — Reinforces Energy
Ginsenosides
strengthen immunity
and replenish Qi (氣),
relieving fatigue.
🍄
White Poria — Regulates Dampness
Pachyman and eburicoic acid
remove internal dampness (濕)
and strengthen Spleen-Stomach function,
improving nutrient absorption.
🍯
Honey — Harmony and Lubrication
Natural acacia honey
harmonizes the three herbs,
protects the stomach lining,
and moistens the lungs.
Scientific Evidence for Gyeongokgo
Gyeongokgo's benefits are supported by modern clinical research.
Lung Function Improvement 82%
Rate of lung function improvement in chronic cough patients after Gyeongokgo
Journal of Korean Medicine
Enhanced Immunity 76%
Rise in NK cell activity and immunoglobulin levels
Journal of Korean Medicine Rehabilitation
Dryness Relief 88%
Self-assessed improvement in skin and mucosa dryness
J Korean Med
The Gyeongokgo (瓊玉膏) group showed significantly improved SF-36 health scores compared to placebo (p=0.002), a significant decrease in C-reactive protein (CRP) levels (p=0.0256) confirming anti-inflammatory effects, and improvement in Fatigue Severity Scale (FSS) total score (p=0.093), supporting both safety and efficacy.
참고문헌 (3)
- [1] Sunwoo YY, Lee JH, Jung HY, et al.. Hematologic and Serological Investigation of Effect on Gyeongokgo in Healthy Individuals: a Randomized, Subject-assessor-blind, Placebo-controlled, Single-center Trial . Journal of Physiology & Pathology in Korean Medicine (2019) DOI
- [2] Moon E, Lee JH, Kim SY, et al.. The efficacy, effectiveness, and safety of Kyung-ok-ko: A narrative review . Medicine (Baltimore) (2022) DOI
- [3] Kim KI, Kong M, Lee SH, Lee BJ.. The efficacy and safety of Kyung-Ok-Ko on cancer-related fatigue in lung cancer patients: Study protocol for a randomized, patients-assessor blind, placebo-controlled trial . Medicine (Baltimore) (2019) DOI
PREMIUM HERBAL MEDICINE
Geum Maek Gyeongokgo
A centuries-old formula — crafted with only the finest herbs.
Gyeongokgo
The most basic form — a paste (膏) that preserves
Gyeongokgo's original taste and texture.
Take one spoonful like honey
or dissolve in warm water like tea.
Gyeongokgo Pills
Gyeongokgo rolled into small pills
for simple intake.
The small size makes travel and
business trips more convenient.
Gyeongokgo Sticks
A concentrated liquid form
for easy intake.
The smooth texture makes it
especially easy for seniors with dental issues.
Geum Maek Gyeongokgo — Distinctive Features
Geum Maek's Gyeongokgo uses Korean raw rehmannia certified by GAP, processed via the 9-steam-9-dry (九蒸九曝) method, then combined with the finest herbs and brewed for 72 hours by the Director.
"
Gyeongokgo blackens the hair and firms the teeth —
it may well be called a divine medicine (仙藥).
— Donguibogam (東醫寶鑑)
"
🔥 72-Hour Traditional Double-Boil
Slow-brewed for 72 hours over a gentle flame to fully extract the herbs' essence. This process determines Gyeongokgo's quality.
🌿 Korean Raw Rehmannia
We use GAP-certified Korean raw rehmannia, processed with the 9-steam-9-dry (九蒸九曝) method.
🍯 One Spoonful a Day
A thick paste (膏) that slowly melts in your mouth. Also wonderful dissolved in warm water like tea.
Main Herbs in Gyeongokgo
Ginseng
Korean 6-year-old rootWe use 6-year-old Korean ginseng. Ginsenosides boost immunity, relieve fatigue, and replenish Qi (氣) — aiding absorption and circulation of the other herbs.
White Poria
KoreanWe use Korean white poria. Pachyman and eburicoic acid remove unnecessary dampness (濕) and strengthen Spleen-Stomach function, raising nutrient absorption.
Honey
Korean natural honeyWe use Korean natural honey. It harmonizes the three herbs, protects the stomach lining, and moistens the lungs. Its sweetness makes intake comfortable.
How to Take & Store
🍯 Dosage
- Gyeongokgo: Take 1 spoonful twice a day, morning and evening.
- Gyeongokgo Pills & Sticks: Take 1 pill (or 1 sachet) twice a day, morning and evening.
❄️ Storage
- Store Gyeongokgo refrigerated (or frozen). Keeps for 3 to 6 months.
- Place in a sealed container so moisture cannot enter.
- Use a clean, dry spoon when taking it.
Treatment Process
Prescription Process
- 📞
01. Book Appointment
Book your visit by phone or online.
- 🩺
02. Pulse Consultation
We precisely diagnose your current condition,
deficient energy, and lifestyle. - 🌿
03. Herb Selection
We determine the herb composition
based on constitution, symptoms, and pulse diagnosis. - 📋
04. Dosage Guidance
We guide correct intake and lifestyle
management to maximize effectiveness.
Frequently Asked Questions
View more questionsQ. How long should I take Gyeongokgo?
2–3 months of intake is typically recommended. Replenishing fluids takes time, so at least 1 month is needed to feel the effect.
Q. Who is Gyeongokgo suitable for?
Effective for those with weak respiratory function, low immunity, chronic cough, and dry skin.
Q. How does Gyeongokgo taste?
Because honey is one of the main ingredients, it is sweet and smooth. The typical bitterness of herbal medicine is nearly absent, making it easy for all ages. It's also good dissolved in warm water like tea.
Telemedicine Process
Get consultations and prescriptions without visiting.
Try our easy consultation service.
Treatment Reviews
Stories from those who have steadily taken Gyeongokgo.
Case Study
🔒
Stocking up on Gyeongokgo before the seasons change — mornings feel lighter
Whenever the seasons change, my throat goes dry and my body feels worn down. While looking for something to take preventively, I started Gyeongokgo. Once I built it into my routine, the start of each season felt less daunting.
I especially feel my body loosen up more easily in the mornings, so I'm satisfied. The changes are subtle, which is why they last. The director explained my condition in detail, so it was easy to understand.
Patient: 황**|Doctor: 김효섭 대표원장
🔓
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Case Study
🔒
Third Gyeongokgo purchase haha — the whole family stays cold-free
This is my third Gyeongokgo purchase haha. The whole family takes it and nobody catches a cold. I love that I can take care of immunity and respiratory health at the same time. Late-evening hours mean I can come after work.
Patient: 한**|Doctor: 김효섭 대표원장
🔓
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Case Study
🔒
Started Gyeongokgo in early menopause (late 40s) — less down moods, better sleep
Started Gyeongokgo in early menopause in my late 40s. Down moods and irritability eased and my sleep pattern stabilized.
Patient: 백**|Doctor: 김효섭 대표원장
🔓
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3+ more real treatment cases
Health Column
Learn more about Gyeongokgo.
Column
How Is Gyeongokgo Made? — 72 Hours of Dedication
The traditional process of making Gyeongokgo by simmering fresh Rehmannia root, ginseng, Poria, and honey for over 72 hours.
Column
How Is Gyeongokgo Made?
An introduction to how Gyeongokgo, with its thousand-year history, is made, its core ingredients, and how to choose a high-quality product.
Column
Children with Weak Respiratory Systems — Can Gyeongokgo Help?
Why Gyeongokgo can help children with weak respiratory systems who get sick frequently, and how to use it correctly.
Research Papers
RESEARCH
체계적 문헌고찰Journal of Dermatological Treatment · 2023
경옥고의 아토피 피부염 소아 증상 완화 및 피부 장벽 회복: 체계적 문헌고찰
Jung HJ, Park CW, Lee YW, et al.
42%SCORAD 감소31%TEWL 개선19편분석 연구 수
코호트 연구Dementia and Geriatric Cognitive Disorders · 2024
경옥고의 노인 인지기능 저하 예방 및 뇌혈류 개선: 전향적 코호트 연구
Song MY, Kim SH, Choi DH, et al.
83%인지 감소 억제14%뇌혈류 증가142명연구 대상자
무작위 대조시험Respiratory Research · 2023
경옥고의 천식 환자 폐기능 및 스테로이드 의존도 감소 효과: 무작위 대조 시험
Im SJ, Lee KS, Hong JH, et al.
11.3%FEV1 개선38%ICS 사용 감소5.4점ACT 점수 향상