presentationa white powder in a clear hard shell capsule.each capsule delivers: l-histidine hci 500mg encapsulated with: capsule shell (gelatin) anti-caking agent (magnesium stearate) silicon dioxide. disintegration time: less than 30 minutes. usage & administration1 to 6 capsules daily. it is preferable to take amino acids with fruit juice or water rather than milk. an amino acid is best taken ? hour before any meal or at bedtime.other information allergen advice see presentation section for ingredients listed in bold.the following list of allergens are excluded: wheat barley soya eggs milk (and milk products) lactose nuts sulphites celery fish shellfish yeast and gluten containing ingredients.cautions this product is not recommended for children or pregnant or lactating women.storage instructions to be stored in a cool dry place and protected from lightlegal category food supplement.