High cholesterol can be hereditary, especially in conditions like familial hypercholesterolemia, where genetic factors cause elevated LDL (bad) cholesterol despite a healthy lifestyle. A high heartbeat or rapid pulse can occur due to anxiety, dehydration, thyroid imbalance, heart rhythm issues, or certain medications, so you should consult your doctor or a cardiologist for evaluation and ECG testing. So-called blood purifiers sold as supplements or herbal products are not medically proven to clean the blood; your liver and kidneys naturally perform this function. To reduce the risk of heart attack, maintain healthy cholesterol levels, avoid smoking and alcohol, eat a balanced diet low in saturated fats, exercise regularly, manage stress, and follow your doctor's prescribed medications. Seek immediate medical care if you experience chest pain, breathlessness, or dizziness.