UCLA links omega‑6 to prostate growth

Prostate cancer is one of those diseases where patients immediately ask about food. Fair question — especially for men on active surveillance, where the whole strategy is to watch a low-risk can(uclahealth.org)rsation a little closer to real evidence. A randomized phase II trial showed that changing the fat balance in the diet — less omega‑6, more omega‑3, plus fish oil capsules — slowed a lab marker tied to tumor growth over one year. (pmc.ncbi.nlm.nih.gov) ### What actually changed here? This was not a mouse study and (urotoday.com)ake, and take fish oil for a year, with prostate biopsies taken at baseline and again at one year. (pmc.ncbi.nlm.nih.gov) ### What are omega‑6 and omega‑3 fats? They’re both polyunsaturated fats, but they show up in different foods and push biology in different directions. Omega‑6 fats are common in many seed and vegetable oils and in processed foods made with them. Omega‑3 fats are higher in fatty fish and some plant foods, and fish oil supplements concentrate the long-chain forms people usuall(pmc.ncbi.nlm.nih.gov)ans need some — but that the modern diet often skews heavily toward omega‑6 and away from omega‑3. (uclahealth.org) ### Why did the researchers focus on Ki‑67? Ki‑67 is a proliferation marker. Basically, it tells you how many tumor cells are actively dividing. That matters because higher Ki‑67 level(pmc.ncbi.nlm.nih.gov)n and metastasis, so it works as an early readout when a one-year trial is too short to wait for deaths or major clinical events. (ascopubs.org) ### So what did the numbers show? The intervention group’s Ki‑67 index dropped 15% over the year, while the control group’s rose 24%. In raw terms, Ki‑67 went from 1.34% to 1.14% in the diet-plus-fish-oil arm and from 1.23% to 1.52% in the control arm. The between-group difference cleared statistical significance, with a reported P value of.043. (urologytimes.com) ### Does that mean the cancer shrank? No — and this is the important restraint. The trial did not show significant differences in several secondary outcomes, including grade group, tumor length, PSA, or Decipher genomic score over that same year. So the signal is real, but it’s an early biologic signal, not proof that diet alone prevents surgery, radiation, spread, or death. (uroto([ascopubs.org)cancer/157018-high-omega-3-low-omega-6-diet-with-fish-oil-for-men-with-prostate-cancer-on-active-surveillance-the-capfish-3-randomized-clinical-trial.html)) ### Why does active surveillance matter so much here? Because this is the group most likely to use a low-risk intervention if it helps. Many men with low-risk prostate cancer choose surveillanc(urologytimes.com)ge can safely slow the biology of the tumor, even modestly, that could buy time or reduce escalation for some patients. (ascopost.com) ### Is fish oil the whole story? Probably not. The intervention bundled three things together — lower om(urotoday.com)which is a reminder that even “nutritional” interventions are still interventions. (urotoday.com) ### What should someone do with this? Treat it as encouraging, not definitive. The result supports doing bigger(ascopost.com) seed oils cause prostate cancer or that fish oil is a stand-alone treatment. The bottom line is simpler — in men already on active surveillance, shifting the omega‑6/omega‑3 balance looked like it slowed a meaningful tumor-growth marker, and now the real question is whether that translates into better outcomes patients can actually feel and count. (ascopubs.org)