Nitric oxide is a signalling molecule produced naturally in the body. It helps blood vessels relax and widen, supporting healthy circulation and blood flow.

As we age, nitric oxide production can decline due to lifestyle, oxidative stress, and reduced endothelial efficiency. Supporting nitric oxide pathways is one reason certain nutrients, including L-arginine and antioxidant polyphenols, are widely studied in cardiovascular research.

ProArgi-9+ is formulated to support nitric oxide production using a combination of amino acids, antioxidants, and plant compounds designed to work together as part of a daily routine.

This is not a medication — it is nutritional support designed to help maintain healthy function. Any supplementation should be discussed with your healthcare professional if you are currently on medication.

What Makes ProArgi-9+ Unique

Many products contain L-arginine. ProArgi-9+ was designed to go further by combining:

• L-arginine (a nitric oxide precursor)
• Antioxidants and polyphenols (to support nitric oxide stability)
• Plant extracts studied for vascular support
• A formulation designed to support nitric oxide pathways daily rather than relying on short-term stimulation

ProArgi-9+ Videos

Dr Mike Saunders, Head of Science & Innovation at Synergy, makers of ProArgi-9+ talks about his love for our flagship product.

Select either the 2 minute short overview, or the 35 minute science deep-dive.

The Discovery That Changed Cardiovascular Science

Why This Matters to Your Health

Nitric oxide is essential because it helps support;

• Healthy blood vessel relaxation and flexibility
• Efficient circulation and oxygen delivery throughout the body
• Endothelial function (the health of the blood vessel lining)
• Healthy blood pressure already within the normal range
• Long-term cardiovascular resilience as we age

Research

What the research suggests: Clinical data show that nutrients that support nitric oxide pathways, such as L-arginine and polyphenols, are associated with vascular benefits in some populations. However, outcomes vary by individual health status and study context, and supplements are best viewed as part of a broader lifestyle approach.

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