My PSA went up to 6.5 from 4.5. That’s ok because they raised the ok threshold when I turned 70.
Take 30 mg of lycopene a day, and some fish oil, and together, your PSA score should dip some.
More options to reduce, here:
https://www.livestrong.com/article/411179-can-vitamins-and-supplements-affect-psa-readings/
https://www.wikihow.com/Lower-Prostate%E2%80%93Specific-Antigens-(PSA)