The lime essential oil comes from Citrus Aurantifolia of the Rutaceae plant family and it is extracted by the steam distillation of fresh lime. Caution: This oil can cause photosensitivity if exposed to the strong sun directly after application. (Q) Can I use this oil on my DIY projects or etc? (A) Yes. But dilute properly. (Q) Is this oil Therapeutic grade, medicinal grade or aromatherapy grade? (A) There is no organization that regulates therapeutic quality. That terms are only for marketing purposes. Actually NAHA disallows membership to those companies that use these terms. (Q) Can I apply this oil directly to my skin? (A) Always recommend diluting properly. Undiluted use of essential oils on the skin can be harmful and potentially cause severe irritation or sensitization. Using 2% essential oil dilution is generally considered as a safe guideline for topical application of essential oils on adults