Caffeine and Its Antioxidant Properties-It Is All about Dose and Source

Area of Science:

• Pharmacology
• Nutritional Science
• Biochemistry

Background:

• Caffeine is the most consumed psychoactive substance globally, primarily through beverages like coffee and tea.
• While recognized for its stimulant properties and ergogenic effects in athletes, caffeine also exhibits potential antioxidant mechanisms.
• Its consumption is linked to preventing neurodegenerative diseases and conditions associated with oxidative stress.

Purpose of the Study:

• To review the antioxidant effects of caffeine.
• To assess whether caffeine from natural sources or supplements provides similar benefits to pure caffeine.
• To evaluate how other compounds in caffeinated products influence caffeine's impact on oxidative stress.

Main Methods:

• Literature review of studies on caffeine's effects on oxidative stress.
• Analysis of research considering both pure caffeine and caffeine from dietary sources.
• Examination of how co-ingested substances (polyphenols, sugars, sweeteners) modulate caffeine's antioxidant capacity.

Main Results:

• Pure caffeine has demonstrated antioxidant effects in numerous studies.
• The presence of polyphenols in natural caffeine sources may enhance antioxidant capacity.
• Sugars and artificial sweeteners in some products can diminish caffeine's beneficial effects on oxidative stress.

Conclusions:

• Caffeine's antioxidant benefits are well-documented, but the source matters.
• Dietary context significantly influences caffeine's net effect on oxidative stress.
• Further research is needed to fully elucidate the impact of various food and drink matrices on caffeine's health-promoting properties.