Ageless Forever Anti-Aging News Blog

Monica Mollica

Monica Mollica

Medical Writer & Nutritionist

MSc in Nutrition

University of Stockholm & Karolinska Institute, Sweden 

   Baylor University, TX, USA

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Caloric Restriction for anti-aging and longevity - does it work in non-obese humans?

If you are following the anti-aging news, you’ve heard about the supposed benefits of chronic calorie restriction for increasing longevity. These claims are based on research done in various species such as flies, worms and mice.
 
Here I will explain that chronic calorie restriction makes it impossible to implement and reap the health benefits of an active lifestyle with regular exercise, and causes severe health consequences for humans.  
 
While animal studies can and do shed light on what’s going on at mechanistic level, we have to be very careful and resist the temptation to extrapolate results from animal experiments to humans.
 
Here I will make the case that chronic calorie restriction actually counteracts the prospects of a healthy vital long life.
 

Waist-to-Height Ratio as a Screening Tool for Testosterone Deficiency

A bidirectional relationship exists between excess body fat, and/or belly fat, and testosterone levels in men. That is, excess body (belly) fat decreases testosterone levels and may cause testosterone deficiency, and low testosterone levels increases body (belly) fat.[1-4]  I covered this in-depth in a previous article “Testosterone and Fat Loss - the Evidence”.
 
In “Keep your waist to less than half your height” I introduced the waist-to-height ratio and explained that it is a better tool for predicting health outcomes and mortality than is waist circumference alone. I have also covered the association between a large waist (i.e. belly) and reduced testosterone levels in "Young Men, Waist, Testosterone and Erectile Function: Low-T is not only an old man's issue".
 
Here I will summarize research showing that the waist-to-height ratio can also be used as a screening tool for testosterone deficiency. 
 
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Dr. Pierce's Medical Organization Affiliations

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