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Claims shaky for some ingredients in energy drinks

Claims shaky for some ingredients in energy drinks

EatingWell

By Karen Ansel, M.S., R.D.

Buyer beware. Almost every energy drink has its own “energy blend” of proprietary ingredients. Furthermore, manufacturers aren’t required to tell you how much of each ingredient their product contains. Not knowing could hurt you. Watch out for:

1. Caffeine: In small quantities, caffeine may boost energy, alertness and athletic performance. Limit yours to 200 mg at a time, no more than twice a day.

2. Ginseng: There’s no evidence this East Asian herb does a thing to boost energy, and it’s actually been shown to decrease exercise endurance. Since it lowers blood sugar, avoid it if you’re taking diabetes medication.

3. B Vitamins: Any excess of these water-soluble nutrients (B6, B12, niacin, folic acid) is quickly flushed out of your body, so they’re fairly safe. But experts agree they’re unlikely to pep you up, despite what drink labels may say.

4. Sugar: Some energy drinks can pack up to 62 grams of sugar–or 15-1/2 teaspoons’ worth–per 16-ounce can. That can easily stack up to 250 calories a can–about as much as a 20-ounce bottle of cola.

5. Taurine: An amino acid, which may boost athletic performance and metabolism, taurine is generally considered safe in doses of up to 3,000 mg a day.

6. Green tea extract: Used to deliver a kick without the jolt, this extract delivers small amounts of caffeine. While studies confirm it’s a top source of cancer-fighting antioxidants, there’s not enough research to back up claims that it can lower blood pressure or help you slim down.

7. Guarana: This extract, from the seeds of the South American guarana plant, delivers twice the caffeine of coffee per weight. Its claims (that it stimulates weight loss and fights fatigue), however, are shaky at best.

8. Green coffee extract: Made from unroasted coffee beans, this newcomer lacks coffee taste, but still supplies caffeine. Claims that the extract promotes weight loss have yet to be backed up by research.

9. Ginkgo biloba: Made from the leaves of the ancient Chinese ginkgo tree, this herb is said to fight mental fatigue and improve memory. Yet the research regarding these claims is conflicting. A new National Toxicology Program study links ginkgo extract to thyroid and liver cancers in mice.

10: Carnitine: This amino acid purportedly pumps up endurance and promotes fat burning. Since we only need extra carnitine if we’re deficient (which is rare), it’s fairly useless to take more. Less than 3 grams a day is generally considered to be safe; more can lead to stomach upset and possibly seizures.

(EatingWell is a magazine and website devoted to healthy eating as a way of life. Online at www.eatingwell.com.)

(c) 2015 EATING WELL, INC. DISTRIBUTED BY TRIBUNE CONTENT AGENCY, LLC

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