No, first order of business is consulting your doctor and/or a nutritionist and otherwise adhering to common sense of having a reasonably balanced nutritional diet.
If your first order of business is taking random advice from the intertubez, you have bigger problems than high blood pressure.
In most places, any bozo can claim to be a nutritionist. From what I can tell, a large proportion of them are deranged crackpots.
So, no. Absolutely do not consult a self-described nutritionist.