This widely-known and used stimulant is Caffeine is an organic bitter, white crystalline purine, a methylxanthine alkaloid.  It is found in the seeds, nuts, or leaves of a number of plants native to Africa, East Asia and South America.  Caffeine protects against sun damage, increase collagen production, increase circulation, and increase elasticity. 

Can be found in the following O Naturals Products: Brightening Coffee & Vitamin A Gel Face Mask