The Gary Null Show - 10-27-26

HEALTH NEWS

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Flavonoid found in citrus slows lung cancer cell growth in lab tests

Friedrich–Alexander University Erlangen–Nurnberg (Germany), October 20 2026 (Medical Xpress)

Quercetin is found in citrus fruits, onions and buckwheat and is known for its anti-inflammatory properties. Now researchers at Universitätsklinikum Erlangen at Friedrich-Alexander Universität Erlangen-Nürnberg (FAU) have investigated how the plant compound could help treat lung cancer. In the lab, experiments showed that quercetin slows the division of lung cancer cells and almost completely stops their migration. The results have appeared in the journal Cell Death Discovery.

Quercetin led to the tumor cells dividing more slowly in the experiments. In one of the two types of lung cancer cells studied, the plant compound also reduced oxidative stress. This stress is caused by reactive oxygen compounds in cells and can lead to the development of cancer.

Quercetin had a particularly pronounced effect on the migration of cancer cells—a key prerequisite for them to form metastases. The higher the quercetin dose, the fewer cancer cells migrated. At the highest dose, the migration almost completely stopped,.

In the studied cancer cells, the amounts of EGFR and PD-L1 decreased. EGFR takes up growth signals and transmits them into the cell. PD-L1 can help cancer cells hide from the body's own immune defenses.\