U.S. marshals have seized batches of dietary supplements and unapproved medications produced by a Long Island company because of unsubstantiated claims the products treat, cure or ease medical conditions.

The U.S. Food and Drug Administration in Washington ordered the seizure.

Confidence Inc. in Port Washington marketed supplements that play on people's fears of serious illness, and primarily concerns of the elderly, the FDA said. The company claimed its products could treat senile dementia, brain atrophy, several forms of cancer, clogged arteries, osteoarthritis, kidney dysfunction, painful urination, depression and other medical conditions.

Products bear such names as Dr. Brain, pH Balance, Fe-Mon-9, Glucosamine Plus and Prostate-7, all dietary supplements. One of its products, Full-Bloom, is considered a drug, according to the FDA, aimed at increasing the size of women's breasts.

The company did not answer Newsday's phone and email inquiries Tuesday about the seizure and products it manufactures.

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"This firm made unfounded claims to consumers," Melinda K. Plaisier, FDA's acting associate commissioner of regulatory affairs, said Tuesday in a statement.

"Products with unapproved disease claims are dangerous because they may cause consumers to delay or avoid legitimate treatments," she added.

No illnesses have been associated with the products. Illnesses or serious side effects should be reported to the FDA at CAERS@fda.hhs.gov or by calling 240-402-2405.

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On its website, the company states have a workforce of 1,300 people and manufacturing facility of 1 million square feet. It also says it markets more than 150 products under 25 brands in more than 21 countries.