Redline is the name of an energy drink manufactured by Vital Pharmaceuticals, Inc. This beverage is marketed towards individuals in the fitness industry and sold at health clubs/gyms and health food stores. Redline products are sugar-free and contain a blend of herbal extracts, caffeine, amino acids and sucralose (artificial sweetener). The manufacturer claims that they enable an individual to focus and burn more fat by increasing your metabolism and building more muscle. Certain individuals should use caution, or avoid such drinks.
The active ingredients of the original Redline Energy Drink RTD include caffeine, evoburn, hydroxy, yerba mate extract, yohimbine and green tea extract. Redline is calorie- and sugar-free. It is sweetened with sucralose (Splenda) and comes in five flavors, including grape, green apple, Triple Berry, peach mango and mandarin orange. The ingredients in this energy drink pack a powerful punch but, in combination, the safety of consuming them in humans has not been thoroughly researched. The stimulant ingredients in Redline include caffeine and yerba mate extract, and potential fat-boosting or metabolic enhancing ingredients include evodiamine, yohimbine and green tea extract.
Stimulants slightly and temporarily increase your metabolic rate and improve short-term, high-intensity exercise performance according to many research studies, including one published in 2010 in the Journal of Strength and Conditioning Rsearch. Technically, only calories provide energy, but an energetic "feeling" can be experienced by ingesting caffeine alone, perhaps helping you to work out longer and harder, burning more total calories. Yerba mate is a South African plant that contains between 0.7 and 1.7 percent caffeine (based upon dry weight). Yerba mate (extract) appears to have a stimulating effect on the heart muscle and may increase heart rate as well.
Evoburn is an ingredient name used to describe the plant chemical known as evodiamine. In animal studies, such as those published by the Journal Endocrinolgy in 2008, it has been shown to reduce fat uptake in mice because it has a function similar to the active ingredient in hot peppers (capsaicin) which increases body temperature, thus slightly enhancing caloric burn. Yohimbine is an alkaloid substance with stimulant and aphrodisiac effects. Results of one research study showed that oral yohimbine supplementation may encourage fat loss in athletes, however there is no experimental evidence that it is effective for locally reducing adipose (fat) tissue. Green tea extract is rich in catechins, which help increase energy expenditure and alter body composition. This effect is enhanced by exercise.
There is a warning on the bottle of Redline energy drinks that those under the age of 18 should not consume them. With the extremely high caffeine content, neither should pregnant women or those with high blood pressure. While caffeine and green tea extract on their own are safe ingredients for most individuals, other active ingredients in this beverage have not thoroughly been tested on humans. Yohimbe is available in prescription form in the United States for the treatment of male impotence. According to the Mayo Clinic, Yohimbine has significant side effects, such as anxiety reactions and may be dangerous if used in excessively amounts. Higher doses of oral yohimbine may cause rapid heart rate, high blood pressure, panic attacks, headaches, dizziness and insomnia. Although this energy drink offers no calories, it contains ingredients that can have an adverse effect on your body.
- Journal of Strength and Conditioning Research; Efficacy of Acute Caffeine Ingestion for Short-Term High-Intensity Exercise Performance: A Systematic Review; T.A. Astorino and D.W. Roberson; Jan 2010
- "Endocrinology;" Evodiamine Improves Diet-Induced Obesity in an Uncoupling Protein-1-Independent Manner: Involvement of Antiadipogenic Mechanism and Extracellularly Regulated Kinase/Mitogen-Activated Protein Kinase Signaling; T. Wang, Y. Wang, Y. Kontani, et al.; 2008
- "Research in Sports Medicine"; Yohimbine: The effects on Body Composition and Exercise Performance in Soccer Players; S.M. Ostojic; 2006