What is Razberi-K? Razberi-K® contains raspberry keytone, an aromatic component present in raspberries and other fruits. Application and Serving Size Razberi-K® is appropriate in a product for weight management. It can be administered in a capsule, tablet, powder or liquid. The recommended serving is 100mgs twice daily or 200mgs prior to workout. As with any weight management program, you should consult your physician first. Razberi-K® should be used in conjunction with proper nutrition and exercise.