Air taxi Captain reported executing a go-around from the approach to BOS after encountering wake turbulence from the preceding aircraft.

Narrative

During approach; crew was sequenced behind a heavy Aircraft Y. Upon turning base; crew encountered heavy wake turbulence. The aircraft dropped in altitude abruptly; crew and passengers were thrown into the ceiling; though no injuries occurred. thanks to seatbelt use. Crew broke off the approach in order to establish better spacing for arrival. Crew executed an uneventful full stop landing and continued with normal duties. Cause: I believe this was the result of inadequate separation between a heavy category aircraft and a following light aircraft. I am unsure as to the exact separation; but the turbulence indicates less than desireable separation. Also telling is that ATC cleared us for a visual approach instead of the ILS that was in use; indicating inadequate separation for sequential instrument approaches; which in this case was also less than needed for the wake turbulence.Suggestions: Extra separation when a light category aircraft is following a heavy category into the same (or even a parallel) runway.