Subchronic toxicity study of corn silk with rats

Area of Science:

• Herbal medicine safety assessment
• Toxicology studies
• Traditional Chinese Medicine (TCM) validation

Background:

• Corn silk, a traditional Chinese herbal medicine, is widely used for treating various ailments like edema and kidney stones.
• Despite its traditional use, scientific evidence regarding the safety of corn silk is limited.
• A comprehensive safety assessment is crucial for validating its medicinal applications.

Purpose of the Study:

• To evaluate the subchronic toxicity of corn silk in a rodent model.
• To establish the no-observed-adverse-effect level (NOAEL) for corn silk consumption.
• To provide scientific evidence supporting the safety of corn silk for human use.

Main Methods:

• Subchronic toxicity study conducted over 90 days in male and female Wistar rats.
• Dietary administration of corn silk at concentrations of 0.5%, 2.0%, and 8.0% (w/w).
• Comprehensive monitoring of health parameters, including body weight, food consumption, hematology, blood chemistry, organ weights, and histopathology.

Main Results:

• No adverse effects were observed in rats consuming corn silk at any tested concentration.
• Significant differences noted between groups were not considered detrimental to health.
• The no-observed-adverse-effect level (NOAEL) for corn silk was established at a minimum of 8.0% (approximately 9.354 g/kg/day for males and 10.308 g/kg/day for females).

Conclusions:

• The study supports the safety of corn silk consumption.
• No adverse effects were detected, indicating corn silk is safe for human use at the tested levels.
• Findings validate the traditional use of corn silk as a safe herbal remedy.