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General description	Stimulating xanthine alkaloid.
Found	- coffee - green tea, black tea - mate - guarana - cola
Anti-aging role	- neurostimulant - increase alertness - improve concentration - decrease fatigue, headache and migraine attacks - promote weight loss and speed up metabolism - improve anaerobic sport performances - stimulate adrenaline secretion - topical use - reduce sings of fatigue on skin, has beneficial effect on dermatitis, redness and itching, stimulates microcirculation
Deficiency symptoms	Not possible.
Therapeutic doses	- 4 - 6 mg/kg of body weight - it's recommended to start with smaller dose (100 mg/day) and gradually increase
Maximum safe level	Not established.
Side effects	- fast heart rate - insomnia - euphoria - high blood pressure - low insulin sensitivity
Contraindications	- it's not recommended for people with heart diseases, hypertension and hyperthyroidism
Interactions	- beta blockers - creatine - analgesics - echinacea - theanine and theophylline - melatonine - it's not recommended to use other stimulants during caffeine supplementation
Composition formulas	- drinks that contain high doses of caffeine (coffee, tea) or tablets and capsules with caffeine powder - usually in combination with other substances that improve weight loss and sport performances
Other remarks	- the impact of caffeine on the body depends on the frequency of its application - 6-8 hours is required for the caffeine to extract from the body

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