Vitamins and minerals intake adequacy in hematopoietic stem cell transplant: results of a randomized controlled trial.

Micronutrient intake among hematopoietic stem cell transplant (HSCT) recipients is poorly studied. This randomized control trial (RCT) assessed the effect of nutritional counseling on micronutrient intake post HSCT. Patients with hematological malignancies receiving HSCT were randomized at hospital discharge into an intervention group (IG) and a control group (CG) between 2016 and 2017. IG received individualized nutritional counseling in the first 3 months post HSCT while CG received general qualitative education without reinforcement. At assessment points (hospital admission, discharge, 30, 60, and 100 days post HSCT termed T4), 24-h recalls were analyzed, and micronutrient intake was compared to patients' individual needs. Results were reported as percentages of dietary reference intake. Groups (IG, n = 22 and CG, n = 24) had similar characteristics pre HSCT. Copper and α-tocopherol intake at T4 were significantly better in IG. Many B vitamins, vitamin C, Manganese, Potassium, Zinc, and vitamin K improved in IG only at T4 compared to baseline intake. Median vitamin D intake remained low in both groups with <20% of patients meeting their individual needs post HSCT. In conclusion, counseling was associated with a trend of improved micronutrient intake. Vitamin D levels remained low irrespective of counseling.