Here are several ergogenic aids to consider adding to your workout routine.

Green Tea

Tea is the second most widely consumed beverage in the world. However, of the three major types of tea–black, oolong, and green–the latter should be of special interest for active individuals. Research has linked the catechin polphenols in green tea to energy expenditure, fat oxidation, and other health benefits. Caffeine, which is frequently used for weight control, is also present in green tea.

L-tyrosine

Physiological and psychological stress can drain your energy and make the couch more appealing than the gym. In numerous studies, however, tyrosine was shown to help prevent stress-related declines in cognitive functions. In other words, tyrosine can improve mental toughness–so after a long day at the office you'll be ready to workout.

Zinc

This mineral is an important player in carbohydrate, protein, and lipid metabolism, as well as for cell growth and division, and enzyme function. Without enough zinc, you may become easily fatigued and experience decreased endurance during rigorous exercise. While red meat, shellfish, grains, and legumes are all good sources of this mineral, many of us don't fulfill the recommended daily amount, which makes a zinc supplement a good idea.

Magnesium

You may lose some magnesium through sweat or urine, but that's not the only reason to supplement your diet with this mineral. Magnesium helps facilitate cell energy, and has reportedly improved muscle function, and enhanced performance. It is also beneficial for recovery from physical stress and bone remineralization. Another reason to maintain optimal levels of magnesium is for sleep. In a healthy lifestyle a good night's rest is just as essential as an active day, and this mineral has been shown induce slumber.

CLA

It might sound counterintuitive, but you may be able to trim your body fat by consuming this fatty acid. CLA, or conjugated linoleic acid, has been shown to increase lean body mass while decreasing fat when there is an anabolic stimulant, like resistance training or aerobic exercise.