Essential Oil Candles are in use for almost a thousand years from now. Though essential oils have tremendous medicinal benefits but the cosmetic and perfume industries were the major users of them. Though the candles do not have the effect that essential oil has when applied directly, but it would provide a really subtle influence on your mind and body. When these candles are burned, they release a continuous stream of vapor which spreads in the air. On breathing it reaches the lungs and enters the bloodstream, improving circulation.