- Dietary palmitic acid (PA), found in palm oil, promotes metastasis in oral carcinomas and melanoma in mice (no such effect from oleic/linoleic acids). PA also exerts long-term effects on the genome, and tumour cells exposed to PA for a short time remained highly metastatic even after PA was removed. https://www.worldwidecancerresearch.org/news-opinion/2021/november/how-dietary-fats-help-cancer-to-spread-around-the-body/ 72 comments science