Is the high level of vitamin B-12 in Zipfizz dangerous?
Vitamin B-12 is a water-soluble vitamin; therefore, the digestive tract absorbes what it needs and gets rid of the excess. In fact, B-12 injections, with higher levels than this, are a commonly used healthcare treatment.
Find more Zipfizz FAQs at http://healthydrinkmix.com/zipfizz-faq.