SAN DIEGO -- A popular health supplement made in Carlsbad, Calif., is now the focus of a federal investigation, 10News reported.

Federal officials believe Seasilver, a liquid nutritional supplement, is making false claims about the benefits of its product and has filed a lawsuit.

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Seasilver Product Under Federal Investigation

The company claims Seasilver is 50 times stronger than kelp and strengthens the immune system. It also claims to cleanse vital organs and purifies blood.

Company employees arrived to work on Monday and were greeted with extra security and a two-page statement telling employees that the Federal Trade Commission had filed a lawsuit and was temporarily shutting the firm down.

"People who have jobs, depend on this job. This uncertainty is flabbergasting," Seasilver employee Sherilyn Brown said.

According to the statement, the lawsuit claims that Seasilver has made false claims about the benefits of its products in marketing materials and on product labels.

"None of us knew this was going to happen. None of us," Brown said.

While Brown, who takes the supplement, was stunned at the news, she did recall some peculiar behavior from the company last week, when they were asked to hand in their product handbooks.

"They're like, nobody can keep them. They were going to destroy them," she said.

The FTC said agents visited the company Monday to "preserve evidence."

As for the product itself, the FTC said there is no immediate health risk.

"If we felt it's poisonous, we'd be providing more information," the statement read.

The FTC also said it will release more information on the lawsuit on Thursday. Company officials were unavailable for comment, 10News reported.