I Was Diagnosed With CLA/SLA In March 2016 And My

I was diagnosed with CLA/SLA in March 2016 and my white blood cell count is dropping slowly. I understand Vitamin A can help. I eat fruit and vegetables everyday including carrots. I do not take multiple vitamins due to concerns with artificial ingredients & other questionable contents. Do you think I could benefit from taking a vitamin A supplement & if so how much & what kind? Are there good all natural multiple vitamin supplements on the market that could help my condition?