"I decided there was a market for gluten free an nobody was doing it," said Markowitz.
Gluten is a protein found in wheat, including flour, but it's also what nearly cost Randi her life.
Markowitz said, "I ended up in Methodist Hospital for a week."
Randi was diagnosed with celiac disease, the most severe form of gluten-intolerance.
She didn't know what she was eating was poisoning her.
"I had stomach problems all the time, I had chronic fatigue syndrome, I had my hair falling out. It's amazing what you get used to over time and think it's normal," said Markowitz.
Now Randi's bakery, called Gluten Free Houston is catering to others just like her and it's struggling to keep up with demand.
I think we're going to be up another two hundred percent this year that's how fast it's grown.
Dr Ashish Debroy treats celiac disease, and since 2003, the number of Americans diagnosed has more than doubled.
Debroy said, "Its mainly because we are more aware of it mainly in both in the medical field and in the patients."
And now gluten free has gone mainstream. Nowadays you don't have to go to a specialty bakery to find your gluten free items, just take a closer look at your local grocery store.
Kristal Howard, a Kroger manager said, Our sales of gluten-free items have skyrocketed in the last ten years Kroger offers 28 hundred different gluten free items."
With so many options, many people are voluntarily going gluten-free but Dr. Ashish said, "Please talk to your gastrointerologist or your pediatric gastrointerologist before you start a gluten free diet, otherwise it could make it extremely difficult to diagnose."