Hormone Key to Keeping Weight Off

Discussion in 'Food and nutrition' started by [email protected], Dec 2, 2005.

  1. "This is impossible. It says absolutely nothing about calories. Calories
    are the only factor that influences weight gain and weight loss. This goes
    against everthing we know about obesity and the laws of thermodynamics."

    Every time you assert something about the topic of calories you end up
    with another hole in your foot, you still don't grasp the basics of the
    science involved. The article doesn't bother to review what is basic and
    assumed knowledge generally at hand. Hormones are part of the feedback
    and feedforward system by which the body in part allows various organs to
    communicate. In the subject of the article one of these is identified,ie.
    as we eat its level changes which signals the brain that we have eaten
    enough.

    When this happens within the normal parameter of calories consumed there
    is no weight gain from excess calories being stored. In some people the
    hormone signaling is out of wack and the "enough" signal either comes too
    late or at a level that is not effective to easily stop caloric intake.
    This is not the only hormone with this effect and various nutrients are
    better at evoking them in appetite control even to the point of even
    feeling hungary in the first place.
     
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  2. TC

    TC Guest

    http://www.forbes.com/lifestyle/health/feeds/hscout/2005/12/01/hscout529360.html

    Hormone Key to Keeping Weight Off
    -- Robert Preidt


    THURSDAY, Dec. 1 (HealthDay News) -- A new study offers insight into
    why it's easier to lose weight than to keep it off for good.

    Body weight is regulated by metabolic, neuroendocrine, and autonomic
    systems, which work together to restore fat mass in people who've lost
    weight, the study authors concluded. That's because the body interprets
    reductions in weight as a deficiency in the hormone leptin.

    These mechanisms explain why more than 85 percent of obese people
    who've lost weight eventually regain those pounds, the Columbia
    University researchers said.

    They tested this theory by giving "replacement" doses of leptin to
    obese people and to lean people who'd just lost weight. The leptin
    doses reversed most of the metabolic, neuroendocrine and autonomic
    changes that occur in an effort to counter reduced body weight.

    The study appears in the Dec. 1 issue of the Journal of Clinical
    Investigation.

    The findings suggest that drugs that target the leptin signaling
    pathway may help prevent people from regaining weight after they've
    lost it, the scientists said.

    A study published in November found that in obese rats, the receptor
    for leptin -- which makes fat burn up -- disappears from fat cells.
    This means that leptin can't act on the fat cells, the University of
    Texas Southwestern Medical Center at Dallas researchers said.

    ****

    This is impossible. It says absolutely nothing about calories. Calories
    are the only factor that influences weight gain and weight loss. This
    goes against everthing we know about obesity and the laws of
    thermodynamics.

    TC
     
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