What sweetener mixes (soluble not suspension) with oil in a liquid state? It is not glycerine.?

Many edible mage oils are sweetened with "oil soluble sweetener" but the lables never state what that is. I have looked for two years for the answer to this question??? I have a small business and have 4,000 bottles and nothing to fill them with. I need help! It is not sugar melted, not glycerine. Tis a puzzlement. Help! THANK YOU ! ! !