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Blood Pressure Basics: What the Numbers Mean, Healthy Ranges and How to Measure at Home

Understanding the two numbers that say a lot about your heart.

Quick answer

Blood pressure is the force of blood against artery walls, written as two numbers: systolic (pressure when the heart beats) over diastolic (pressure between beats). According to the American Heart Association, normal is below 120/80 mm Hg, elevated is 120–129 systolic with diastolic below 80, stage 1 hypertension is 130–139 or 80–89, and stage 2 is 140/90 or higher. Readings above 180/120 need urgent medical attention. Measure at home seated, after 5 minutes of rest, with your arm supported at heart level, and take two readings a minute apart.

Key takeaways

High blood pressure is called the "silent killer" because it rarely causes symptoms. Knowing your numbers is the first step to protecting your heart.

What the two numbers mean

Systolic (top number)

The pressure in your arteries when your heart beats and pushes blood out.

Diastolic (bottom number)

The pressure in your arteries when your heart rests between beats.

Blood pressure categories

CategorySystolicDiastolic
NormalBelow 120and below 80
Elevated120–129and below 80
Stage 1 hypertension130–139or 80–89
Stage 2 hypertension140 or higheror 90 or higher
Severe (seek care)Above 180and/or above 120

Measuring at home

Use a validated upper-arm cuff. Avoid caffeine, exercise and smoking for 30 minutes before. Sit with your back supported, feet flat and arm resting at heart level, rest for 5 minutes, then take two readings one minute apart. Record the results and share them with your doctor.

Healthy habits such as less salt, more potassium-rich foods, regular activity, limited alcohol and good sleep support healthy blood pressure. Some adults also choose a supplement for extra support: Vasoryn combines L-citrulline, pine bark, grape skin, L-carnitine and niacin to support healthy blood pressure and vascular function.

Important: supplements do not replace blood pressure medication. If your readings are consistently 130/80 or higher, see your doctor. Call emergency services for a reading above 180/120 with chest pain, shortness of breath, back pain, numbness, weakness, vision changes or difficulty speaking.

Sources

  1. American Heart Association – "Understanding blood pressure readings."
  2. Whelton P.K. et al. – "2017 ACC/AHA guideline for the prevention, detection, evaluation, and management of high blood pressure in adults," Hypertension, 2018.
  3. CDC – "Measure your blood pressure."

Common questions

What is a normal blood pressure?

Below 120/80 mm Hg according to the American Heart Association.

Does high blood pressure have symptoms?

Usually not, which is why regular checks matter.

Can Vasoryn replace blood pressure medication?

No. It is a dietary supplement; never change medication without your doctor.

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