Earlier quoted context omitted.
While I agree that taking some B12 supplement is probably a good idea for a lot of people, I don't think statements like that can be made so readily. For one, nutritional studies tend to point to whole foods being the way to go to gain the nutrients required by your body because of the vastly complex interplay of absorption and the related catalysts. And in many cases, it's easy to overdo it on specific vitamins, esp…
What the parent probably meant: B12 is synthesized by bacteria, algae and yeasts, not directly by the animals we eat. There's a theory that due to the conditions that most animals are farmed in nowadays - the environment and standardized and monotonous feed - they would be B12-deficient themselves if not for supplementation. So most of the B12 you find in factory-farmed animals might be from supplements in animal fee…
More simply, the mechanisms involved in uptake by eating beef that received a B12 supplement is still very different from directly supplementing so the comparison should never be drawn.
As an aside: I would be skeptical of any chemical company's recommendations to the agricultural industry at large...