Whole Blood Viscosity is a measure of how thick or “sticky” the blood is. It reflects the friction between layers of blood cells as they flow through the vessels and is directly influenced by hydration, red cell deformability, inflammation, lipid levels, and fibrinogen.

When WBV is elevated, blood moves more sluggishly through the vessels. This leads to:

• Reduced oxygen delivery
• Increased vascular resistance
• Higher stress on the heart
• Greater risk of clot formation

Think of WBV as the “friction score” of the circulatory system.

Cholesterol levels only tell part of the story. A person with “normal” LDL levels could still be at risk if their blood is too viscous. In fact, WBV abnormalities often precede plaque formation or ischemic events.

Research shows that WBV is more predictive of cardiovascular events than cholesterol in many populations—including diabetics, smokers, and individuals with metabolic syndrome.

Elevated WBV is associated with a wide range of conditions beyond heart disease, including:

• Hypertension
• Stroke or TIA history
• Erectile dysfunction
• Chronic fatigue or poor exercise tolerance
• Memory loss or brain fog
• Poor wound healing or cold extremities

Patients often report feeling “sluggish” or “slow to recover” without knowing why.

Meridian Valley Lab offers an advanced Whole Blood Viscosity Profile, which measures viscosity at both high-shear (arterial) and low-shear (venous) rates—something not included in conventional lab work.

Test highlights include:

• Insight into both micro- and macrovascular health
• Better cardiovascular risk assessment in complex patients
• Utility in prevention, monitoring, and response to interventions
• Available in-office or via direct-shipped DIY kits
• Includes free physician interpretation consultation

Practitioners use WBV testing to:

• Evaluate cardiovascular risk beyond standard lipid panels
• Tailor treatment protocols for blood thinning, hydration, and lifestyle
• Monitor recovery in stroke or post-cardiac patients
• Assess overall circulatory efficiency in complex metabolic cases

Dr. Larsen also highlights WBV’s role in tracking changes over time, especially when patients begin:

• Omega-3 or anti-inflammatory protocols
• Hydration or lifestyle interventions
• Natural anticoagulant support

Whole Blood Viscosity is a powerful marker—one that integrates metabolic, vascular, and inflammatory signals into a single, quantifiable risk factor. As more clinicians turn to functional testing, WBV offers a way to personalize cardiovascular care and detect problems early.

For broader cardiovascular research and methodology discussions, clinicians may also explore indexed literature through the National Library of Medicine.

Search related publications

To integrate WBV into your practice:

• Order the Whole Blood Viscosity Profile through Meridian Valley Lab
• Choose from in-office collection or at-home kit
• Receive physician consult support with every profile

Practitioners: Add Whole Blood Viscosity to complex cardiovascular, metabolic, and fatigue workups to guide earlier, more personalized interventions. Contact Client Services to order or discuss interpretation.

Patients: Ask your licensed provider whether WBV testing could help clarify your cardiovascular or circulation-related risk. Meridian Valley Lab provides laboratory services only and cannot advise patients directly.

Call: 855.405.8378 | 206.209.4200

For a complete list of peer-reviewed references used in this webinar and supporting WBV research, please contact our team.