CFN Nutrimetabol 1 Powder 500gr. Glycine, aspartic acid. This product contains no yeast, wheat gluten, soy protein, milk, corn, sodium, sugar, starch, artificial coloring, preservatives or flavorings. INSTRUCTIONS FOR USE BY MANUFACTURER: Take 1 to 10 teaspoons dosing (approx 2 g), dissolved in water or zuma and spread throughout the day, preferably outside of meals.