Shares of Johnson & Johnson slipped more than 3 percent on Monday, extending losses following Friday's Reuters report that the healthcare conglomerate knew for decades that cancer-causing asbestos lurked in its Baby Powder.

J&J shares (JNJ) plunged 10 percent on Friday, wiping out about $40 billion from the company's market capitalization.

The company knew about the presence of small amounts of asbestos in its products as early as 1971, a Reuters examination of company memos, internal reports and other confidential documents showed.

In response to the report, the company said on Friday "any suggestion that Johnson & Johnson knew or hid information about the safety of talc is false."

On Monday, J&J took out a full-page ad in the New York Times titled "Science. Not Sensationalism," saying it has scientific evidence its talc is safe and beneficial to use. "If we had any reasons to believe our talc was unsafe, it would be off our shelves," the ad said.

J&J Chief Executive Alex Gorsky, in his first public statement since the Reuters story was published, is scheduled to appear on CNBC at 6 p.m. ET on Monday.

While J&J has dominated the talc powder market for more than 100 years, the products contributed less than 0.5 percent of J&J's $76.5 billion revenue last year.

J&J shares (JNJ) closed down $4.39, or 3.30 percent, at $128.61.