The mix of magnesium and L-tryptophan relaxes in stressful situations and has an effect on the animal's mood! Supplementary pet food for dogs and cats. No Stress Mix is 100% natural and contains L-tryptophan, a high proportion of magnesium with added vitamins and minerals. L-tryptophan and magnesium are important for the optimal functioning of nerves and muscles.No Stress Mix has a beneficial calming effect on the animal's state of mind. Ideal for relaxation or stress and has a long-lasting effect.