Science

I personally aim for under 10g refined sugar / day and find that works well for me. If juice is something that is important to you, a glass a couple times a week is probably fine. Drinking it with or shortly after a meal might help by slowing digestion.

I used to drink orange juice every day - it's so good ... but after stopping and starting many times, I realized how much worse I feel when I'm less disciplined about sugar. My doctor was actually suggesting I consider surgery to relieve pain in my wrists, but I've been largely pain free since I started watching sugar intake (~8 years).