Now lactose intolerant people can actually avoid these list of problems by doing one of two things. So by not eating these dairy products, because if you don't eat the lactose, then there will be no lactose build up in our GI tract or as they eat those dairy products that contain the lactose, they can also ingest enzymatically active enzymes, lactase enzymes. Now, a much more severe version of lactose intolerance is known as classic Galactosemia. And individuals who have classic galactosemia basically have an inability to actually digest the galactose molecule. So these individuals can actually break down that lactose into, these two individual monosaccharides and the cells can then uptake these two sugars. But then those individuals with classic galactic cannot actually break down this galactose molecule.