The Big Bang Theory actress, married to tennis player Ryan Sweeting, changed her diet to be vegan and gluten-free to stay healthy. She says that the change has completely changed her. She said: I’m not a vegan, and I don’t have a gluten allergy, but it just makes me feel better.     The Big Bang Theory actress, married to tennis player Ryan Sweeting, changed her diet to be vegan and gluten-free to stay healthy. She says that the change has completely changed her. She said: I’m not a vegan, and I don’t have a gluten allergy, but it just makes me feel better.     The Big Bang Theory actress, married to tennis player Ryan Sweeting, changed her diet to be vegan and gluten-free to stay healthy. She says that the change has completely changed her. She said: I’m not a vegan, and I don’t have a gluten allergy, but it just makes me feel better.