Marnys Guarana 60 capsules. Guarana Capsules MARNYS ® contain 500 mg of Guarana powder standardized. Guarana is an energizer used for hundreds of years by Amazonian Indians to give them more vitality. Usage: 2 to 4 capsules per day on an empty stomach or before meals. Ingredients: Guarana 500 mg. Nutritional (100 g): Energy: 333Kcal/100gr (1392Kj/100gr) Protein: 12% Carbohydrates: 65% Fat: 2.80%