According to the researchers, amygdalin helped lower systolic blood pressure (upper value) by 28.5% and diastolic blood pressure (lower value) by 25%. These effects were increased when taken with vitamin C. Vitamin B 17 Contain the high levels of Thiamine, also known as vitamin B1, which some research shows help lower blood pressure. Furthermore, in a study conducted in New Zealand, results showed Thiamine may have beneficial effects on lowering the blood pressure levels in the individual with early-stage hypoglycemia.