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Colin Davidson

Colin Davidson

The Conversation

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Kim Kardashian’s new caffeine‑free energy drink relies on paraxanthine – here’s what the science says

Paraxanthine is the main metabolite of caffeine. Studies suggest it can boost alertness and focus, but the research base is much smaller than for...

10.03.2026 10

The Conversation

Colin Davidson

Robert F. Kennedy Jr. says antidepressants are harder to quit than heroin – is he right?

Although quitting antidepressants can cause withdrawal symptoms, they are generally less severe than those of heroin.

14.02.2025 10

The Conversation

Colin Davidson

Pharmacies sell some products that have little or no evidence of working – so why do they do it?

Pharmacies in the UK face significant cuts, so it’s perhaps not surprising that they sell many unevidenced lifestyle products.

29.01.2025 10

The Conversation

Colin Davidson