Low White Blood Cell Count on Keto

So I have been on a keto diet for 3 months and my white blood cell count dropped from about 6,000 to 3,000 (which is below normal). I have had a blood test done every 3 months for about 2 years and this is the first time my white blood cells dropped to below normal. I'm wondering if this is a normal adaptation to the diet (maybe from reduced inflamation) or a nutritional definciency or what? I appreciate any comment or feedback.