BEST Caffeine PRODUCTS

Caffeine is a stimulant that is quickly absorbed by the body. It can have effects such as increased breathing and heart rate, and heightened mental alertness and physical energy. These effects can be felt within 5 to 30 minutes of consumption and can last up to 12 hours, depending on the individual. This is supported by numerous studies on the physiological effects of caffeine.

While caffeine can have beneficial effects such as increased alertness and energy, it can also have negative side effects when used for a long time or in high doses (over 400 mg daily). These can include insomnia, nervousness, restlessness, nausea, and increased heart rate. Larger doses might cause headache, anxiety, and chest pain. These findings are backed by various studies on the long-term use and high-dose consumption of caffeine.

There are several sources of caffeine. Coffee is one of the most common, with one cup or 8 ounces containing about 95 mg of caffeine. Espresso contains about 65 mg of caffeine per shot or 1.5 ounces. Black tea contains about 47 mg of caffeine per cup. Other sources include soda, chocolate (cacao), guarana, energy drinks, and supplements. These figures are based on research into the caffeine content of various foods and beverages.

The half-life of caffeine, which is the time it takes for the starting amount of the substance to reduce by half, is between four and six hours. This means that up to six hours after drinking a caffeinated beverage, half of the caffeine you consumed is still present in your body, keeping you alert. This is supported by studies on the metabolism and excretion of caffeine.

While caffeine is generally safe for most adults when used in moderation, it may not be safe for everyone. Certain individuals, such as those with certain heart conditions, pregnant women, and those with a sensitivity to caffeine, may need to limit or avoid caffeine. This is based on research into the effects of caffeine on different populations.