system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do multivitamins have 5% daily value for some vitamins/nutrients and 1500% for others?

Why is there such a wide range of daily values? I can understand calcium being 5% for flavor or pill size reasons, but why even bother to have 1500% of something like thiamin? Would it be possible to engineer a pill that is 100% for everything?
gpt
This is generally divided by 'fat soluble' and 'water soluble' vitamins. Most water soluble vitamins are really hard to overdose on...like vitamin C. You can eat grams of the stuff and any extra just gets washed out in your urine. But, fat soluble vitamins like vitamin E can get stored in your fat cells and liver and reach a toxic level that will hurt you.