Experts pointed to its medieval design, depiction of Christ and several other key factors marking it as in the region of years old.
The principal modern standard used by radiocarbon dating labs was the Oxalic Acid I obtained from the National Institute of Standards and Technology in Maryland.
See chapters 2, 3, 4, and 7 in Radioisotopes and the Age of the Earth:
The rates of disintegration of potassium and carbon in the normal adult body are comparable a few thousand disintegrated nuclei per second.
Samples that have been radiocarbon dated since the inception of the method include charcoal989898 or porn tubetwigs, seedsbonesshellsleather, peatlake mud, soilhair, potterypollenwall paintings, corals, blood residues, fabricspaper or parchment, resins, and wateramong others.
First, remember that no detectable 14 C at all should be present within these samples if they really are millions of years old.