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Free Radical Biol Med 36:838849 Williamson G, Kay CD, Crozier A (2018) The bioavailability, transport, and bioactivity of dietary flavonoids: a review from a his-torical perspective

Most patients rest, read, or continue working during treatment

Deficiencies can occur with medical conditions such as atrophic gastritis (which causes thinning of the stomach lining), pernicious anaemia, Crohns disease, celiac disease, lupus, or other immune system disorders and certain medications

Some people use sublingual delivery (powder held under the tongue briefly before swallowing) but there's no strong evidence this meaningfully improves bioavailability for this compound class