These are made like perfumes were made 100 years ago, before petroleum-based fragrance chemicals. They adapt to your chemistry after about 10 minutes and personalize. Things get really complex when you combine scents and throughout the day, or night, they adjust while different 'notes' develop.

People who normally get headaches or allergic reactions from perfumes are usually reacting to the 4000 different 'fragrance' chemicals used in conventional perfumes and products. Tsi-la perfumes are made with just essential oils & extracts in a jojoba/coconut oil base, and people do not have reactions with these.