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One, your coffee habits: If you’re accustomed to drinking coffee first thing in the morning, your body may have come to use the caffeine as a crutch and thrown off its natural wake-up mechanisms.
Theobromine is a naturally occurring stimulant that dilates blood vessels (instead of constricting them) to increase blood flow, which gives you the same boost of energy that coffee does—except ...
Sodas also vary in caffeine content, but typically a 12-ounce serving will have 3 milligrams to 70 milligrams of caffeine. Other drinks I want to be sure to flag are energy drinks.
The elimination half life of theobromine is between 6 and 8 hours. [1] [2] Unlike caffeine, which is highly water-soluble, theobromine is only slightly water-soluble and is more fat soluble, and thus peaks more slowly in the blood. While caffeine peaks after only 30 minutes, theobromine requires 2–3 hours to peak. [29]
High caffeine consumption in energy drinks (at least one liter or 320 mg of caffeine) was associated with short-term cardiovascular side effects including hypertension, prolonged QT interval, and heart palpitations. These cardiovascular side effects were not seen with smaller amounts of caffeine consumption in energy drinks (less than 200 mg). [79]
The most common victims of theobromine poisoning are dogs, [8] [9] for whom it can be fatal. The toxic dose for cats is even lower than for dogs. [10] However, cats are less prone to eating chocolate since they are unable to taste sweetness. [11] Theobromine is less toxic to rats and mice, who all have an LD 50 of about 1,000 mg/kg (0.016 oz/lb).
The chemical complexity of coffee is emerging, especially due to observed physiological effects which cannot be related only to the presence of caffeine. Moreover, coffee contains an exceptionally substantial amount of antioxidants such as chlorogenic acids, hydroxycinnamic acids, caffeine and Maillard reaction products, such as melanoidins. [3]
If drinking coffee makes you tired or you don't feel its full effects, it may be due to your genetics, tolerance, or lack of sleep.