Does Botox travel to your brain? Can Botox cause dementia? These headlines have sparked a lot of questions — but what does the actual science say?

In this episode of KestyMD Esthetics, Double Board-Certified Dermatologist Dr. Chelsea Kesty breaks down the research behind the viral claims surrounding Botox and the brain. Rather than focusing on headlines, we dive into the published studies, the biology of botulinum toxin, and what we truly know (and don’t know) about how Botox works in the body.

Dr. Kesty explains how botulinum toxin A works at the nerve-muscle junction, why it is used safely in both aesthetic and medical treatments, and the difference between retrograde axonal transport and the blood-brain barrier — two concepts that are often misunderstood and incorrectly combined.

In this episode, we discuss:

- What Botox actually does at the cellular level

- How botulinum toxin blocks acetylcholine signaling to relax muscles

- The 2008 study that sparked questions about Botox and nerve transport

- What researchers discovered about retrograde axonal transport

- Why animal studies and cosmetic Botox dosing in humans are very different

- How Botox doses used in research compare to typical aesthetic treatments

- What current research says about Botox, the central nervous system, migraines, and chronic pain

- Whether there is evidence that Botox causes dementia or neurological disease

The goal of this episode is not to convince you to get Botox or avoid it — it’s to provide an evidence-based look at the science so you can make informed decisions about your health and aesthetic treatments.

Subscribe to KestyMD Aesthetics for more science-backed conversations about skincare, lasers, injectables, and the latest advancements in dermatology.

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