Health authorities in Canada warn of the possible link to a strain of ginkgo that causes brain inflammation and may increase the risk of dementia.
In a statement, Health Canada said ginkgos are a popular and widely used ingredient in herbal remedies, including remedies for colds and flu.
The company said its tests of the strain, known as “Coleus” in Canada, found it was not linked to any known dementia-related illness.
Ginkgo, also known as ginko biloba, is grown in Asia and China.
In some countries, ginkos are used to treat colds, fever, and allergies, and are believed to help slow the progression of dementia, according to the company.
Health Canada also said that in recent years, gonggong herbal remedies have been used as dietary supplements to help prevent or treat cold and flu, as well as to treat anxiety and other mental health issues.
The Canadian Food Inspection Agency is investigating the cause of the problem.
The agency said it is also investigating whether the company has made the product in compliance with Canada’s drug-impaired drug policy.
Gonggos have also been known to cause skin irritations, particularly in children.