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Fuel cells are being widely implemented as energy sources for various applications including hybrid electric vehicles as they offer lower emissions and improve the environmental conditions. However, due to their low output voltage and wide variation from no-load to full-load, a DC-DC converter is required to interface the fuel cell with the load. The major challenges associated with such DC-DC converters are to obtain high voltage gains and high efficiency for the overall performance of the fuel cell hybrid vehicle system. Therefore, it is of primary importance to select a suitable converter topology and flexible controls system which can capable of satisfying all the performance requirements. Thus, this paper presents a comparative review of DC –DC converters in power conditioning for fuel cell hybrid electric vehicles with discussion on recent trends in converter control strategies.