To give you an idea of the duration for a good first time cleanse, here are some approximate guidelines. The gut 2-3 months, the kidneys 2 months, the liver about 3 months and the lymphatic system anywhere from 3 months to 2 years. You should consider cleansing the gut, kidney and liver all at the same time. In addition, include lymph detox into the program once the kidneys are filtering.
You can do a simple at home test to see if your kidneys are filtering properly or not by collecting urine in a glass and looking at the fluid against a light source. If the urine is clear, your kidneys are NOT filtering, if the urine has sediments then your kidneys are filtering.