Library.

“Heating olive oil produces carcinogenic compounds that pose a cancer risk to humans.”

Heating olive oil — especially past its smoke point or during prolonged, repeated frying — can generate compounds like aldehydes and PAHs that are classified as potentially carcinogenic. However, the claim is misleading because no epidemiological evidence establishes that heating olive oil poses a demonstrated cancer risk to humans under normal cooking conditions. Olive oil actually produces fewer toxic byproducts than many other cooking oils, and overall olive oil consumption is associated with reduced cancer risk in meta-analyses.

“The contraceptive pill has been officially classified as a top-tier carcinogen.”

The claim contains a kernel of truth: IARC classified combined oral contraceptives as Group 1 ("carcinogenic to humans") — its highest evidence category — back in 2005. However, "top-tier carcinogen" misleadingly implies extreme danger. Group 1 ranks the strength of scientific evidence, not the level of risk. The pill sits alongside processed meat in Group 1, not because they pose equal danger, but because evidence of some carcinogenic effect is strong. The claim also omits that the pill reduces the risk of ovarian and endometrial cancers and that absolute risk increases are small.