>I take 500mg to 1g randomly throughout the day.This increases the risk of kidney stones. I recommend a typical upper limit of 200mg, i.e., you can cheat the occasional day going above that if you're eating multiple oranges or something, but ideally avoid ever going below 90mg or above 200mg in a day, and maintain a daily average of a little above 100mg. If you're taking vitamin C supplements and they're not delayed release, you can split these tablets. For example I would cut a 500mg vitamin C tablet into 8 pieces and take 1 per day if I'm not getting enough from vegetables or fruits.
https://www.health.harvard.edu/blog/high-dose-vitamin-c-linked-to-kidney-stones-in-men-201302055854>With 500ml waterDoesn't matter how much just as long as you're always washing down whatever bits of ascorbic acid are in your mouth/teeth with a non-acidic beverage after consuming oranges or ascorbic acid supplements. Acids dissolve tooth enamel.
https://www.hindawi.com/journals/crid/2014/485387/>Redpill me on Vitamin C90-120mg is enough, maybe go up to 150mg if you're sleep deprived.
https://sci-hub.se/10.1016/j.brainresbull.2015.02.002 
