Sienna Hartwell
Clinical pharmacologist turned science writer; spent eight years reviewing adverse-event reports for a national medicines regulator before moving into long-form health journalism covering the supplement and longevity industries.
3 articles published
Articles
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Health & Medicine
TGA Proposes to Ban Andrographis from Australian Cold and Flu Supplements
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Health & Medicine
Yellow Oleander Hidden in Weight Loss Supplements: The FDA's Ongoing Alert on Tejocote Root and Brazil Seed Products Sold on Amazon
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Health & Medicine
Methylene Blue: What Science Actually Says About the Viral Brain Supplement Biohackers Are Dropping in 2026