Prokar is a trustee to The Prostate Cancer Research, UK, which has a primary focus of finding bench to bedside solutions for advanced prostate cancer. This led to the inauguration to the Prostate Cancer Research of excellence at KCL, inaugurated by Sir Derek Jacobi in 2014.

​

He also supports two other UK charities, The Malcolm Coptcoat Trust as a trustee, to champion surgical innovation and The Urology Foundation as a major fund-raiser. Prokar raises funds through competing in marathon and ultra-distance events.

Prokar is also a trustee to The Prostate Cancer Foundation in Kolkata, India to raise awareness of prostatic diseases in West Bengal. One of its major achievements has been the publication of a blog on the last days of the poet and Nobel Laureate Rabindranath Tagore whose death from prostatic disease had hitherto been largely unknown. This had a major impact with the blog being read and shared over 200,000 times.