Is it okay to take garcinia and raspberry ketones together?

Not enough data. Despite all the marketing hype & what you might hear from celebrity TV docs, there are no miraculous cures available from dietary supplements, whose manufacturers are not required to prove safety or effectiveness. Moreover, their manufacturing techniques are open to (unknown) contamination. Check out http://www.usatoday.com/search/dietary%20supplement/. So no data on separate use much less togethe.