Dr. Oz investigates how a vitamin B12 deficiency can age you. Find out how to get more B12 into your diet to help you feel younger and healthier.

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!

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