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.
This is a problematic designation when the product in question is bacon, ham, salami, or any other kind of traditionally cured meat. I just examined a package of Trader Joe's Uncured Pastrami that I found next to the other deli meats in my local branch of that store. It's clear that the manufacturers are using the uncured moniker to indicate that the pastrami was made without the addition of sodium nitrate (saltpeter) or sodium nitrite (pink salt).