Vegetable glycerine, or glycerol, is a clear, odorless liquid produced from plant oils, typically palm oil, soy, or coconut oil. Palm and coconut oils are natural triglyceride mixtures; each triglyceride is composed of three fatty acids esterified with glycerin. Vegetable glycerin has a number of valuable applications that include cosmetic products, foods, and as a replacement for alcohol in herbal and botanical tinctures.
What are Essential oils?
Essential oils are derived from the actual plant material, i.e., flowers, leaves, seeds, roots and bark by distillation or with citrus oils by cold expression method. During inhalation, odor molecules travel through the nose and affect the brain through a variety of receptor sites, one of which is the limbic system, which is commonly referred to as the "emotional brain."
The limbic system is directly connected to those parts of the brain that control heart rate, blood pressure, breathing, memory, stress levels, and hormone balance (Higley & Higley, 1998). This relationship helps explain why smells often trigger emotions. Knowing this, we can assume how inhalation of essential oils can have some very profound physiological and psychological effects!