Caffeine, tea and food

Anyone reading the Michelle Francl book, *Steeped: The Chemistry of Tea*?

If you want to **keep caffeine in your system** then eat grapefruit and food from the apiaceae family (e.g. carrots, celery).

But if you want to **clear caffeine out quicker**, eat brassicas (e.g. cabbage, kale, broccoli, cauliflower).

Just thought I'd mention because we get so many posts about caffeine here, maybe companion eating could help.