low blood glucose cause depression

i heard that low blood glucose will cause depression and anxiety . is that true ? i will fell unwell when i am hungry . does anyone have this kind of experience ? how to conquer it without eating ? actually i am kind of tired for losing weight . failed again and again .the weight will gain back even got success . why ? am i that kind of physique easy gaining weight ?

so busy everyday ! work .take care of kid , chore...... and lose weight!!