Hum... most of anything metaphysical is just fine.
The catholic church has been suppressing that info for ages, because it gives you information that makes you question their dogma.
They've tried to keep any one from researching to keep their grip on you guys as tight as possible.
But the meridians are a very successful part of the eastern medical system, the Ayruvedic for centuries And the chinese medical system to--think accupuncture. EFT doesn't use needles though. All applications using meridians are quite legit. Look 'em up.
I believe they've done a number of studies regarding the efficacy. But of course, might as well set your frightened self to fail because you are most likely unable to think for yourself--it's part of the religious 'training'.