For PINES Wheat Grass, Barley Grass, or Alfalfa:7 tablets or 1-1/4 teaspoon of powder (3.5 grams) is the recommended serving size.Six Green Duo Capsules are a serving.Our serving sizes are based on a 50 gram serving of spinach.  Nutritionists recommend at least three servings of vegetables per day, especially dark green leafy ones like those from PINES. The benefits of eating your greens every day come from consistency over time. That’s why we emphasize the convenience of our products. Even if you don’t eat spinach every day, PINES products are convenient and economical ways to increase your vegetable nutrition.