Caffeine is a stimulant found in tea, coffee and cacao plants. Many take caffeine to have a surge of energy to kick start their day, and is also popular among individuals who does sports, or are looking to lose weight.
Caffeine blocks the effects of adenosine, the substance that relaxes our brain, making us feel tired. It also increases our adrenaline level and brain activity, promoting alertness and focus. Caffeine is also shown to increase metabolism to promote a leaner physique, therefore making it a popular ingredient in weight loss and sports pre-workout products.