Biological Heart Valves. Biological Heart Valves are made of tissues and valves derived from animals or human donors. Their biggest advantage is that they do not cause blood clotting on their surface and truly replicate the form and function of the normal human valve.
The biggest difference between cured and uncured is the fact that the uncured uses natural curing agents, such as celery powder, which transforms into nitrite when it is processed. Thus, uncured products have labels with: âNo Nitrates or Nitrites added except those naturally in celery powder or juiceâ.
In the United States, meat products are regulated by the United States Department of Agriculture. The USDA defines uncured to indicate products that have not been preserved by adding sodium nitrite, sodium nitrate or a salt cure. So when you see uncured on the label, the label is informing you that the product does not contain added sodium nitrate or sodium nitrite.