Karen unpacks the hype surrounding methylene blue, a vivid cobalt dye that's gained popularity as a trendy wellness supplement. From its historical use as a textile dye and medical treatment to modern claims about boosting brain power, energy, and longevity, Karen breaks down what the science actually says—and what it doesn’t. With potential risks ranging from drug interactions to serotonin toxicity, she urges listeners to think twice before adding this unregulated supplement to their daily routine.

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