Tom’s of Maine is a personal care brand well known for its use of natural ingredients, though a recent FDA report has identified some very undesirable contents they say are in the company’s products.

The FDA sent a warning letter dated November 5th, detailing data that suggests some of Tom’s toothpastes were contaminated with bacteria – a discovery that the FDA based on reported internal testing as well as an agency inspection in May of the company’s manufacturing plant in Sanford, Maine.

Specifically, the FDA points to several of Tom’s toothpaste formulas where they say water used for processing contains multiple types of bacteria, including those linked to infections of the blood, lungs and eyes.