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    Combination of green tea, caffeine, capsaicin and tyrosine increases fat loss by 2 lbs

    Posted by .(JavaScript must be enabled to view this email address)
    Tuesday, December 19, 2006 4:16 am Email this article
    A supplement containing green tea catechins, caffeine, capsaicin from hot peppers and the amino acid L-tyrosine increased metabolism in overweight people by 20 calories during the following four hours and increased fat loss by 2 pounds after two months according to a study from A. Belza in Denmark. Subjects

    Subjects : 80 overweight and obese people

    The study involved 80 overweight and obese subjects—62 womena and 18 men—who on average were 46-years-old and had a body mass index (BMI) of 31.2.



    Diet : 800 calories for one month

    They were put on a diet of 800 calories per day for a month when they lost an average of 15 pounds.

    Diet : 300 calories below needs for two month

    Those who lost at least 4 percent of their body weight—more than 6.6 pounds—were instructed to eat a diet 300 calories per day below their needs for the next two months.

    One-third were given a placebo, another third were give the supplement, and the final third were given the supplement in an enterocoated release tablet.



    Supplement contents

    The supplement was taken as nine tablets per day and contained a daily total of:

    Supplement taken one hour before meals

    The supplement was taken as three tablets, one hour before breakfast, lunch and dinner.


    Weight Loss

    Weight loss : No difference

    There was no significant difference in weight loss between the groups after the two month period.


    Fat Loss

    Fat loss : 2.2 lbs greater fat loss with supplement

    After two months, those give the combination of green tea catechins, caffeine, capsaicin and L-tyrosine lost 2.2 pounds more body fat than those given a placebo—4 pounds of fat with the supplement versus 1.8 pounds for those given the placebo.



    No decrease in thermogenesis after two months on supplement

    Thermogenesis increased by an average of 20 calories during the four hours following taking the supplement.

    The total increase in metabolism for the day is expected to be in the range of 70-100 calories per day according to the paper.



    Conclusion : Combination of ingredients may help to maintain weight loss

    “In conclusion, the combination of these bioactive food ingredients may be of value in supporting weight maintenance after a weight reduction,” Belza concluded.



    Comments : The results are not too convincing

    The results are not very convincing.

    When I see a study reporting increased fat loss, but no additional weight loss compared to placebo, I’m suspicious.

    It does not give me much hope long-term results of any significance.

    Study funded by Metabolife, but product not available

    The study was funded by Metabolife, although the paper notes that the product is not commercially available.


    Belza A, Frandsen E, Kondrup J. Body fat loss achieved by stimulation of thermogenesis by a combination of bioactive food ingredients: A placebo-controlled, double-blind 8-week intervention in obese subjects. Int J Obes (Lond). 2007 Jan, 31(1):121-30.


    A. Belza
    Department of Human Nutrition
    The Centre for Advanced Food Studies
    The Royal Veterinary and Agricultural University
    Rolighedsvej 30
    DK-1958 Frederiksberg C, Denmark
    .(JavaScript must be enabled to view this email address)

    Articles on the same subject can be found here:


    On Nov 16, 2008 at 2:52 am Itsme wrote:

    . . . . .

    Above you said "When I see a study reporting increased fat loss, but no additional weight loss compared to placebo, I?m suspicious."

    I'm the same way. It's too easy to cheat in that type of circumstance. Besides that, it's difficult (but not impossible) to lose fat and gain muscle at the same time.

    Please feel free to share your comments about this article.




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