I drink less than a glass of orange juice every day, and I only buy not from concentrate juice. But I do take a vitamin C supplement that also contains bioflavonoids, so that's helpful. Orange juice does have a naturally high sugar content, so diabetics have to be aware of that. Here's an article that says two glasses boost brain-power in the elderly.
Two daily glasses of orange juice 'boosts elderly brainpower': Significant improvements can be seen in less than two months, research shows
- Scientists put the results down to chemicals called flavonoids – natural substances which occur in high levels in oranges
- They are said to improve memory through activation of the part of the brain associated with learning and storing information
- Researchers asked 37 volunteers to drink nearly a pint of orange juice every day for eight weeks
- Participants – 24 women and 13 men aged 60 to 81 – saw significant improvements in brain function
Read more: http://www.dailymail.co.uk/sciencet...-two-months-research-shows.html#ixzz3aYe6TbZw