Udo's Choice - Childrens Blend Probiotics (60). With 5 billion 'friendly' bacteria per daily capsule and 7 strains of lacto and bifido bacteria, Udo's Choice Children's Blend is especially useful during the school term.. Please note this product will arrive unrefrigerated.. With such a short timescale in transit its quality/strength will not be affected as the product has a long shelf life. Please refrigerate upon receipt and use as recommended. For this reason, we can’t accept returns of Udo's Choice.