Custom capsules maximize the effects of herbal medicine by adjusting the amount of herbal medicine according to the individual's constitution and physical condition, and are made into capsules that are easy to consume, making them easy to store and carry.

K-TONIC has been clinically proven to be a health tonic with powerful efficacy, and is often prescribed for the purposes of anti-aging and disease prevention, chronic fatigue relief, immunity enhancement, improvement of congenital weak constitution, and recovery of energy after surgery. It also has the effect of relieving stress and clearing the mind, so it is also effective for students taking exams, patients with stress-related diseases, and dementia patients.

K-TONIC is a capsule version of Gongjin-dan pill

Several studies scientifically prove the effectiveness of Gongjin-dan as following

• Significantly ameliorated alterations in oxdative stress-related biomarkers

https://www.sciencedirect.com/science/article/abs/pii/S0378874115002421

• Anti-amnesic effects of GJD

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0159823

• Can effectively treat chronic mental and social fatigue

https://www.sciencedirect.com/science/article/pii/S2213422024000052

• Has anti-fatigue properties, especially under sleep deprivation

https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2018.0047