GcMAF is usually combination with about 5,000 IU vitamin D3 daily. Blood levels of vitamin D are often low in many kinds of diseases, such as cancer, HIV AIDS, etc.
Normal vitamin D levels are necessary in order for GcMAF to work fully.
Ask to have your blood 25 hydroxy-vitamin D as well as calcium levels tested.
If blood calcium levels become elevated, the dose of vitamin D3 may need to be reduced to achieve optimal balance.