ADI (Acceptable Daily Intake or Acceptable Daily Intake) is defined as the quantity of a substance, which - judging by the data available at the time of evaluation - can be accepted daily throughout life, without any observable health risks. ADI may be stated for a limited time period, when toxicological the data and research of the certain additive is not completely available. In this case, it is stated a period during which further tests must be carried out. Substances with very low toxicity (often a food and ingredients of natural origin) that are consumed in quantities which do not present any risk to human health, can get an ADI "not limited" or more recently "not specified" meaning is no rule for manufacturers on the maximum quantitates used in their production.