[vixen99]

Not that individualistic. We have tables giving upper and lower limits for around 26 nutrients for daily intake. These tables are published by dozens of countries which mostly did their own research over decades. The tables are pretty much consistent with very little variation. Grok offers a rough estimate of between 10 and 50 million subjects used to determine these values. When you say 'you just have to see what works for you' that’s fine if the ‘what’ is a container (food) that provides content (nutrients) within the limits that extensive research has found to work. With a few very odd exceptions our biochemistry is consistent.