Sen. Richard Blumenthal, D-Conn., who chairs the Senate Commerce Subcommittee on Consumer Protection, Product Safety and Data Security, promised "riveting" testimony that would prove to be a "breakthrough moment" ahead of Tuesday's hearing.

"This whistleblower is one gutsy, smart, strong woman who is speaking truth to the nation about how Facebook is dragging children into dark places and deepening their insecurities with online bullying, self-injuries, suicide, eating disorders, and I think she will tell us what it's like to see the top Facebook executives make decisions that profit Facebook at the expense of children's safety, how they put children’s safety above -- below profit-making motive," Blumenthal told reporters Monday evening.

Blumenthal said the documents Haugen has provided show a "searing indictment of the top corporate management of Facebook ignoring their own study, their own surveys and research that showed how they were putting kids in danger, just so they could profit more."

He also alleged Facebook has been "utterly unresponsive" to the committee's requests to disclose their own studies and said he hopes Haugen coming forward will encourage other whistleblowers.

Frances Haugen, a former Facebook data scientist turned whistleblower, is scheduled to testify before the Senate Consumer Protection Subcommittee at 10 a.m. on Facebook and Instagram’s impacts on young users in a hearing entitled, "Protecting Kids Online: Testimony from a Facebook Whistleblower. "

Beyond alleging Facebook’s knowledge of its platforms’ negative impact on teenagers and young girls, Haugen has reportedly come forward with documents showing the social media giant has also ignored but is aware of how hate speech and misinformation are emphasized on their sites.

Haugen, who revealed her identity during a Sunday interview on CBS' "60 Minutes" has been cooperating with the offices of Sen. Richard Blumenthal, D-Conn., and Sen. Marsha Blackburn, R-Tenn., chair and ranking member of the Senate committee that is assessing potential regulations for the social media giant.

Whistleblower Frances Haugen reiterated to the Senate panel that Facebook's own data raises the concerns she's presenting to them and that the platform has unprecedented access into people's lives worldwide.

"They shouldn't be allowed to keep secrets when people's lives are on the line," she said. "To be clear, if they make $40 billion a year, they have the resources to solve these problems. They're choosing not to solve them."

She also told lawmakers she thinks there should be greater consideration to age when it comes to using any social media after her 15 years in big tech, keeping the focus of her message on its harmful effects on kids.

"I strongly encourage raising age limits to 16 or 18 years old, based on looking at the data around, problematic use or addiction on the platform and Children's self-regulation issues," she said.

She shared particular concern with Instagram, saying internal research shows the platform is "distinctly worse" than other social media platforms because, she said, "it’s about bodies and about comparing lifestyles."