A Johnson & Johnson talcum powder case involving 7,000 claimants opened in the UK High Court this week. The lawsuit has more than doubled from its original 3,000 plaintiffs and stands to become the largest product liability case in British legal history.

Claimants allege that J&J's talc products caused ovarian cancer and mesothelioma. The company has faced similar litigation in the United States, where juries awarded billions in damages. J&J stopped selling talc-based baby powder in North America in 2020, citing market demand shifts rather than safety concerns.

The talc-cancer link remains contested in scientific circles. Some studies suggest inhaled talc particles can reach the lungs and ovaries, potentially causing inflammation and tumor development. Other research finds insufficient evidence of causation. The International Agency for Research on Cancer classified talc as "possibly carcinogenic to humans" in 2020, placing it in the lowest certainty category.

This UK case tests whether British courts will hold J&J liable for injuries claimants attribute to decades of talc product use. The company faces exposure to substantial financial penalties if jurors accept that talc products caused documented cancers in plaintiffs.