What are some good nutrition certifications for California and what are our regulations here?
Being a registered dietitian in California, my understanding is that anyone can call themselves a nutritionist (even without any real education) because of the money that moves from supplement companies to lobbyists and law makers in our state. I recommend that you just get the Lifestyle and Weight Management certification from the American Council on Exercise and refer anyone who has issues outside of their recommendations to a Registered Dietitian.
http://www.acefitness.org/