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UEA researchers trial vitamin A for Covid smell loss | ITV News Anglia
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Vitamin A nasal drops to be trialled for Covid smell loss
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A double-blinded randomised controlled trial of vitamin A drops to treat post-viral olfactory loss: study protocol for a proof-of-concept study for vitamin A nasal drops in post-viral olfactory loss (APOLLO) | Pilot
Vitamin A nasal drops to be trialled for Covid smell loss | Independent.ie