I have bought face care powder genuine vitamin c powder external use only kindly it's weight 50 gram but I want use it as teaspoon daily basis . Kindly tell the ratio of teaspoon , glycerin and water I should mix properly to get effective glow i want to make for 1 week only will store in fridge refill after 1 week weekly basis earlier I used mama earth but it's costly and male I am so doing like this kindly tell ratio