Hello Juliet Gould,
I would charge my hourly rate. I do not see nutrition education on your page; therefore, I agree with the others to stay within your scope of practice. That is the professional decision.
Natalie aka NAPS 2 B Fit.
But to answer your question, our staff nutritionist (when we had one) charged the same rate per hour for nutrition consultation as she charged per hour for personal training. For her, the work was interchangeable.