Laboratory studies have found that polyphenols in plums can cause certain cancer cells to initiate apoptosis, or programmed cell death. Researchers emphasize this effect has been observed in controlled lab environments—not as a proven cancer treatment. Key Facts: • Polyphenols are natural plant compounds • Trigger apoptosis in cancer cells • Observed in laboratory cell studies • Healthy cells were less affected • Studied for leukemia and solid tumors • Does not replace medical cancer treatments