Supplements: Are They Safe During CLL Treatment? Is it safe to use supplements like herbs, vitamins and probiotics during CLL treatment? What effect could they have on your body? CLL experts, Dr. William Wierda and Dr. John Burke, discuss possible health outcomes with the intake of supplements. They also explore the role of diet in quality of life and disease progression. Get email alerts | Subscribe on YouTube | Like on Facebook | Follow on Twitter | Follow on Google+ |