Great Question, and the answer is, it depends. For cellulite you can definitely do carboxy every 2 days for a week or two when you are first getting started to boost the process. But after that, once or twice a week is best. The body needs some time to adapt and to heal. For Fat loss you can do carboxy therapy daily to boost results. This is best used in conjunction with a low level laser therapy for maximal results as well as daily activity and a healthy lifestyle. For eyes or stretch marks or hair loss, once weekly is plenty to achieve maximal results and doing more frequent is not necessary. I hope this answers your questions about Carboxytherapy. All the best Dr. Jamé