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The average American tells 11 lies a week. Lying less actually improves our mental and physical health. That's according to a recent study by researchers at Notre Dame. (Pandey, 7/7)

The parents of two girls who said their children died as a result of a “blackout challenge” on TikTok are suing the company, claiming its algorithm intentionally served the children dangerous content that led to their deaths. The girls were 8 and 9 when they died last year after viewing the challenge, which encouraged users to choke themselves until they passed out, according to the lawsuit, which was filed on Thursday in Superior Court in Los Angeles County. (Levenson and Rubin, 7/6)

For those with menstrual periods, they’ve likely noticed empty shelves where tampons are usually sold. According to market research firm NielsenIQ, that was especially true for Mountain West states like Montana and Utah this spring. Utah had the lowest access nationwide at the time. (Beck, 7/6)

A commonly used treatment for people with knee osteoarthritis is barely more effective than the placebo effect in reducing pain and improving function, a new review of 50 years of data found. Yet despite decades of mounting evidence showing hyaluronic acid injections don’t help most osteoarthritis patients, the shots have become more widely used. (Cueto, 7/6)

Near the corner of busy Santa Monica Boulevard and Corinth Avenue, underneath lines of skinny palm trees and against an almost perpetually bright-blue sky, a hot pink billboard declared: Hot girls have IBS. (Cueto, 7/7)