There's a lot of controversy about caffeine. Is it good for you or bad for you? Well, I'm no doctor, so I'm not going to completely answer that question. Studies have shown results on both sides, and in moderation, it's probably not such a bad thing.
That being said, some people are sensitive to caffeine, other people might want to enjoy a nice cup of tea before bed without being up all night. But there are plenty of options out there.
Herbal infusions such as chamomile or rooibos are all naturally caffeine free, which is a smart choice. (Exception: infusions made from yerba mate do have naturally occurring caffeine, although they are herbal). For black tea lovers, look for a rooibos that mimics strong black tea taste. Trader Joe's Orange Spice Rooibos is a good option in terms of bagged teas. The Shaded Leaf offers a selection of flavored rooibos aimed at caffeine-avoiding black tea lovers. If you have an allergy to caffeine, this is the way to go.
Now, if you are just looking to cut back on caffeine, you have a few more options. Black tea has the most caffeine of all teas, then oolong, then green, then white. White tea is very low in caffeine, about equal to a cup of decaffeinated black tea.
When looking for decaffeinated tea, you want to look for tea that has been decaffeinated through CO2 decaffeination. It's a natural process involving washing, and therefore has no harmful impact on the environment, and it also leaves the health benefits intact.
Imagine this: you're up late in the middle of the week, and know you have to go to bed soon, but you really want a cup of tea to relax with. You open up the cupboard and see only black tea, full of caffeine. But do not despair! In a pinch, you can decaf your own leaves. What you say? Impossible?
While not perfect, you can use the following method to strip out enough caffeine that you can have your tea and sleep too.
1. Prepare your tea as usual, but only steep it for thirty seconds.
2. Pour out the liquor, but keep the leaves.
3. Steep the leaves a second time. The first steeping strips out about 85% of the caffeine in the tea, enough to make a difference.
Notes: This works better with loose leaf tea, as with bagged tea there may be some loss of flavor. This is not recommended for people who are caffeine sensitive.