The invention provides a dry composition for admixture with water, per litre of solution to be made, the following components:(a) 85 to 115 g polyethylene glycol (PEG) having an average molecular weight of 2500 to 4500；(b) 6 to 9 g sodium sulphate；(c) 2 to 3 g sodium chloride；(d) 0.5 to 1.5g potassium chloride；(e) 5 to 15g of an organic acid component； and(f) orange flavouring. wherein the composition is preferably presented in two or more parts. Also described are solutions, kits, unit doses and methods that comprise or use the compositions. The composition is preferably used to clean the colon and gastrointestinal tract. Also disclosed is a dry powder composition comprising PEG and orange flavouring which is substantially free from glucose and is free-flowing after 3 months at 25°C and 60% relative humidity.
