Adjusting Ingredient Percentages in Formulations

Thank you for your question regarding adjusting ingredient percentages in your formulation.

Based on standard formulation practices and the clarification from our staff, the correct method when adding a new ingredient is to ensure that the total percentage of all ingredients still sums up to 100%.

• Case 1 (Total > 100%): While you can calculate based on a total amount that results in percentages summing to more than 100% (e.g., 110% in your example), the final percentages in a standard formulation are always expressed relative to a 100% total. As the staff explained, you would need to recalculate all ingredient percentages based on the new total (e.g., 70% of the original 100% becomes 70/110 = 63.63% of the new 100% formulation).

• Case 2 (Reducing other ingredients): This is the standard and correct approach. When you add a new ingredient (e.g., +10%), you must reduce the percentages of the existing ingredients by an equivalent amount (a total of -10%) so that the overall formulation still adds up to 100%.

In summary, when you wish to add a new ingredient to a formulation, you must reduce the percentages of the other ingredients proportionally to keep the total percentage of the formulation at 100%.