Comment on Use This, Not That: Health Cabinet Transformation by Shirley Pierre Van Zyl6th May 2018Collagen FAQ (Frequently Asked Questions) Share www.GetCollagen.co.zaThank you Dr. Axe for the great information. Could you tell me if there is a rule of thumb or some guideline as to how much carrier oil to use when diluting essential oils. Thanks very much. Source: Dr Axe