Precision Nutrition is not certified with any accreditation company, specifically in the United States. They are actually a Canadian company focusing most American consumers.
If you pay $1000 for their certificate, you basically get head knowledge and nothing more. They tell you that you can label yourself as “PN certified” which means nothing to most people or employers. PN is great at marketing but I really don’t think their program is that special. They pay affiliates to talk good about their program all over the internet. Just hype. If you have ever read any of their writing, they are arrogant and like to tell you how great they think they are, and really if you are going to spend money to get certified anywhere, you should just stick with accredited fitness companies like ACE.
Don’t get me started on Integrative Nutrition. They have no science basis for most of their curriculum and they use celebrities like Dr Oz to sucker people into paying for a useless program that you can’t use anywhere.
Being a Registered Dietitian takes a long time and much of what you learn is medical and they base some of their learning on USDA standards which are way off. Many RDs don’t follow this and give good advice but some don’t. It would also cost more too.
Best bet is to go with an accredited fitness company certification.