What the trials show
Anxiety is where EFT has the most behind it: multiple randomised trials showing meaningful reductions, and a 2019 meta-analysis finding significant effects. There are also PTSD trials, including work with veterans where acupoint tapping outperformed tapping on sham points.
Reviewers who have applied stricter standards — the Tolin criteria, which demand systematic method, RCTs only, and formal quality assessment — report that recent meta-analyses on PTSD and depression meet them. That is a genuine improvement on where this literature was fifteen years ago.
The caveat that runs through all of it is the one the reviewers themselves name: reliance on self-reported outcomes and risk of bias. When the person rating their own anxiety knows they have just had an hour of attention from an enthusiastic practitioner, that is a hard thing to separate out.
The dismantling argument, from both sides
A dismantling study tries to remove one ingredient and see whether the result survives. In EFT that means comparing real acupoints against sham points, or swapping the tapping for something like diaphragmatic breathing.
Proponents cite a meta-analysis of six such studies which found a large difference in favour of real acupoints, and conclude that acupressure is an active ingredient rather than theatre. That is the strongest card they hold and it is not nothing.
The counter-argument is about plausibility rather than the data. Skeptical Inquirer and others have argued there is no mechanism by which tapping specific points could add anything, that meridians have no evidential support, and that unfalsifiable claims are the definition of pseudoscience. Prominent psychologists have said in major journals that it is unethical for clinicians to practise it.
Both of those can be true. A protocol can produce real improvement while the story attached to it is wrong — and EFT has a lot of well-evidenced things inside it that have nothing to do with meridians: naming the distressing thing out loud, repeated exposure to it, slow breathing, rhythmic self-touch, and a structured few minutes of attention.
Where I land
It is free, it takes four minutes, and the recorded harms are essentially nil. Against that, the outcome evidence for anxiety is decent. That is a very easy thing to try and an unreasonable thing to be snobbish about.
What I would not do is let it replace treatment for anything serious, or pay a lot of money for certification in a mechanism that does not exist. And if it works for you, I would hold the explanation loosely. Something in it is helping. It is probably not the meridians.