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It's not that a gluten-free diet doesn't work, but it's not a magic wand either if you don't have celiac disease. Most people who aren't celiac don't notice any real difference in weight or energy when they cut out gluten, though some say they feel less bloated. If what you're after is losing weight or feeling better, it's probably more effective to just eat less processed food and more vegetables, with or without gluten. Going gluten-free is really only justified if you actually have the disease or a diagnosed sensitivity.
Gluten only causes real inflammation and digestive issues in people with celiac disease or non-celiac gluten sensitivity (which does exist, but is less common than people think). For everyone else, what often happens is that when you stop eating bread and pasta, you also stop eating a ton of empty calories, so you lose weight - but that's not because gluten is the villain, it's because you're eating less overall. The energy boost you feel at first is typically a placebo effect or because you're now eating fewer processed foods, not because you've specifically eliminated gluten.
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