The Evaluation and Standardization of Ginseng and Its Components for Blood Pressure Regulation
While the use of herbals is increasing considerably, their efficacy and safety in the humans remains largely unknown. This surge in demand prompts a call for its evaluation. Preliminary data demonstrates that KRG can affect vascular function and our research group has previously shown that Korean Red Ginseng (KRG) can lower blood pressure (BP) in hypertensive individuals. However, it is unknown which dose is the most effective in producing a desired effect. To address this issue, we will test escalating doses of a single Korean red ginseng batch of 0.5g, 1g 3g and 6g on BP in patients with hypertension to determine the most efficacious dose. The most promising dose will be extracted and will advance to next level to be tested again on BP control. The findings of the study may result in better ginseng standardization.
Individuals will arrive at the Risk Factor Modification Centre, St. Michael's Hospital between the hours of 8:00 and 10:00am after a 10 to 12-hour fast on seven separate mornings. They will not have consumed any antihypertensive medications on the study mornings. Each visit will be separated by a minimum of a week. Since the half-life of ginsenosides in humans is less than 24-hours, to allow for a washout of approximately seven half-lives.
In each of the four studies, when individuals arrive at our clinic on a test day they will first have their weight measured and subsequently rest in the seated position. They will then have a catheter inserted into a forearm vein, which will be kept patent by saline. From this device, a registered intravenous nurse will obtain a series of 7ml blood samples. Blood will be taken at 30-min intervals. Subsequently, individuals will fill out forms detailing their pharmacological regimen for the previous 24-hours and their diet (dinner) and activity (sleep, urination, morning routine) regimen for the previous 12-hours. As well, they will detail any adverse events that they experienced since their previous visit. Individuals will then have their office BP measured with a mercury sphygmomanometer until three consecutive measurements of both SBP and DBP <5 mmHg different are obtained. At this point, BP should be steady and subjects will be fitted with an ABPM. Measurements will be taken every 5-min for 30-min, for a total of seven measurements. After the seventh measurement (time 0-min), measurements will be taken automatically every 10-min for 180-min. At time 0-min, treatment or placebo capsules will be consumed. At time 60-min a 360-calorie Ensure® breakfast will be consumed within 5-min. Blood samples will be drawn at 30-min intervals, starting at time 0-min. For 24-hours after the ingestion of treatment, a record of any side effects will be detailed by the participants and then provided to us.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Korean Red Ginseng, Corn Starch
Clinical Nutrition and Risk Factor Modification Centre
St. Michael's Hospital, Toronto
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00730951
- Information obtained from ClinicalTrials.gov on July 15, 2010
The purpose of this study is to determine the effect of KRG (Korean Red Ginseng) on Dry Mouth (Xerostomia).
Ginseng has been used for many years in a wide array of anecdotal medicinal properties. Animal and limited clinical research points to the vascular effects of Korean Red Ginseng (KRG). The...
The study is a 2 phase double blind randomized placebo control trial. The objective is to asses the metabolic and therapeutic effects of American Ginseng (Panax quinquefolius L.) extract a...
The investigators hypothesize that different types of starch vary in their effects on appetite, blood sugar and food intake. In this study, subjects consumed five soups containing 50 g of ...
To determine the effect of North American ginseng on blood pressure in individuals with hypertension.
An inhibitory factor (IF) produced byAspergillus niger strain 19, and which inhibits the action of glucoamylase on starch, has the ability to be tightly adsorbed on to various raw starches, though the...
Korean ginseng (Panax ginseng) and American ginseng (Panax quinquefolius) are widely used medicinal plants with similar morphology but different medicinal efficacy. Roots, flowers, and processed produ...
Gut microbiota is regarded as one of the major factors involved in the control of body weight. The antiobesity effects of ginseng and its main constituents have been demonstrated, but the effects on g...
Korean red ginseng is one of the traditional herbal medicines most widely used in China, Korea, and Japan. To determine whether Korean red ginseng extract can mitigate acute renal nephropathy, we exam...
The objective of this study was to determine if treating high-moisture corn at harvest with an exogenous protease could accelerate the increase in in vitro ruminal starch degradation that is normally ...
Medical and Biotech [MESH] Definitions
Oil from ZEA MAYS or corn plant.
Electrophoresis in which a starch gel (a mixture of amylose and amylopectin) is used as the diffusion medium.
Carbohydrates present in food comprising digestible sugars and starches and indigestible cellulose and other dietary fibers. The former are the major source of energy. The sugars are in beet and cane sugar, fruits, honey, sweet corn, corn syrup, milk and milk products, etc.; the starches are in cereal grains, legumes (FABACEAE), tubers, etc. (From Claudio & Lagua, Nutrition and Diet Therapy Dictionary, 3d ed, p32, p277)
An enzyme of the PHOSPHORYLASES family that catalyzes the degradation of starch, a mixture of unbranched AMYLOSE and branched AMYLOPECTIN compounds. This phosphorylase from plants is the counterpart of GLYCOGEN PHOSPHORYLASE in animals that catalyzes the reaction of inorganic phosphate on the terminal alpha-1,4-glycosidic bond at the non-reducing end of glucans resulting in the release of glucose-1-phosphate.
A plant genus in the family ARALIACEAE, order Apiales, subclass Rosidae. It is best known as an adaptogen and a substitute for ginseng.