Hello Im 47 years old and Ive been on a weight loss regimen for a year, I lost 60lbs from my highest weight of 300lbs. Ive been walking on a daily basis for an 1 1/2 daily. I have just been cutting back on my food intake less bread and sugar foods. I do drink a veggie and fruit smoothie every morning. Im eating much healthier.  I feel like I am taking care of myself more. My problem is that I have been experiencing dizziness and almost on a daily basis light headed. And I also feel heart palpitations. It scares me.
Midair get your blood pressure, serum sodium and potassium levels monitored, all of them are responsible for maintain BP to normal, stop dieting take regular food, eat high salt food and Chat Doctor.