An ingestible particulate composition comprises: a. an alginate and/or alginic acid; b. a bicarbonate and/or carbonate; c. an organic acid; and d. an agglomerant, being a compound, such as a low molecular weight polyol, which allows the particulate composition to flow yet which substantially does not release fine particulates into the air. Resulting particulate compositions have excellent flow characteristics, dust suppression, organoleptic properties and stability. They are highly suitable for administration direction into a patient's mouth, and ingested to alleviate oesophageal and gastric conditions.