Cardiovascular health. When we think about vitamin C, odds are we don’t consider it for heart health—but maybe we should. Several clinical studies show that vitamin C helps promote healthy circulation, encouraging everything from healthy arterial blood flow to improved blood vessel dilation.^5-7

Respiratory health. Vitamin C also supports healthy lung function. In one clinical study, daily vitamin C intake encouraged breathing quality after exercise.8 In another, vitamin C helped maintain healthy breathing when experiencing an immune response to a respiratory challenge.⁹

Clinically Studied for Greater Bioavailability

In a randomized clinical study, researchers compared the formulated Bio-Quercetin to unformulated quercetin. In a randomized clinical study, researchers compared the formulated Bio-Quercetin to unformulated quercetin. They found that the quercetin formulated with fenugreek fibers led to serum levels up to 62 times higher than unformulated quercetin.¹⁰

Antioxidant protection, immune health and more

Getting enough vitamin C is vitally important for overall health but the human body can’t make it, so you have to get vitamin C through diet or supplements.¹¹ In fact, some studies have shown that vitamin C supplementation supports certain aspects of cardiovascular health.¹²

Plus, vitamin C’s biological activity is complemented by the health benefits of the flavonoid quercetin. In fact, vitamin C and bioflavonoids are often present together in healthy foods such as fruits and vegetables, notably citrus fruits.¹³

Highly-absorbable quercetin for immune health and more

There’s a long tradition of using quercetin to relieve the effects of seasonal immune challenges. In a randomized clinical trial, quercetin supplementation encouraged a healthy immune response in physically fit older adults.¹⁴

Another randomized controlled trial found similar results in trained athletes.¹⁵ And in double-blind clinical trials, quercetin promoted a healthy inflammatory response, reduced oxidative stress and helped maintain overall health.^16,17