Relentless – 500ml can Relentless energy drink also had the same amount of caffeine in a single 500ml can but contains six teaspoons of sugar, which is more than half an adult’s recommended daily amount.

Relentless is the brand name of an energy drink created in February 2006 by The Coca-Cola Company….Relentless (drink)

Relentless is an energy drink that helps give you the stamina, focus and drive you need, when you need it. Serve cold for maximum refreshment.

Its active ingredients caffeine, taurine, and ginseng are common to energy drinks; however, its additional focus on alcohol is not. Its packaging states a 6% alcoholic content by volume.

Summary: Occasionally drinking one energy drink is unlikely to cause problems. To reduce potential harm, limit your consumption to 16 ounces (473 ml) daily and avoid all other caffeinated beverages.

While experts believe it’s safe for most healthy adults to consume up to 400 milligrams of caffeine a day – about the equivalent of four 8-ounce cups of coffee or 10 cans of cola – downing multiple energy drinks daily could quickly put someone over that limit, increasing their risk for headaches, as well as boosting …

The high amounts of caffeine in the drinks can cause increased blood pressure and heart rate, while other ingredients in the drink may be responsible for the abnormal heart rhythms, aneurysms, and rarely, unexpected heart attacks. When the high wears off, the body responds like it’s under stress, Springer says.

A new study finds that consuming a caffeine-infused energy drink combined with alcohol is more dangerous than drinking alcohol alone. The researchers say the findings suggest it may be appropriate to put warning labels on energy drinks saying they should not be mixed with alcohol, HealthDay reports.