His call comes as UK experts, the National Screening Committee, have advised against widespread screening for most men, arguing the potential harms of the PSA test outweigh its benefits.
Van Gaal revealed in April 2022 that he had successfully undergone treatment for prostate cancer, emphasising that many men suffer from the condition.
Health Secretary Wes Streeting is expected to examine the evidence before a final decision in March, balancing earlier diagnosis with potential harms of wider screening.
Experts are awaiting data from a major Prostate Cancer UK trial investigating if combining the PSA test with other diagnostic tools, like rapid MRI scans, could lead to more effective screening protocols.