How is nicotinamide adenine dinucleotide (NAD) synthesized, such that their estimates for cost are "about $50,000 a day for a human."? I would expect that any

How is nicotinamide adenine dinucleotide (NAD) synthesized, such that their estimates for cost are "about $50,000 a day for a human."? I would expect that any such estimates on cost would be based on the predicted cost at scale and not the cost to produce it one off for lab experiments. Is this a PR ploy to start staking a high price, so that people view it as a bargain when it is released at some absurd price like $1000/day.