A thing to remember: nutritionist is not a protected title, anyone can call themselves nutritionist, including me.
If you want to be somewhat assured of a scientific basis of what they're saying, ask a dietitian. They at least have a relevant bachelor's.
Reductionist and proud of it.
Being ignorant is not so much a shame, as being unwilling to learn. Benjamin Franklin
Chase after the truth like all hell and you'll free yourself, even though you never touch its coat tails. Clarence Darrow
A person who won't read has no advantage over one who can't read. Mark Twain