Combined Testosterone and GH therapy for best results on body composition and safety profiles

Prevention of age-related muscle loss (sarcopenia)

Many studies have highlighted the importance of investigating all major hormones, and correcting deficiencies and imbalances if present.[1-8] Given the known mechanisms of testosterone and GH/IGF-1 in building muscle (and possibly also DHEA in elderly) it is reasonable that age-related low levels of anabolic hormones contribute over time to sarcopenia and frailty.[1, 2, 4, 7, 9, 10]

Thus, multiple small effects in aggregate can lead to adverse loss of muscle and disability. In this scenario, if replacement was to occur, it would require lower doses of multiple anabolic hormones. An added benefit to this approach would be fewer side effects from the use of lower hormone doses [11]. In addition, multiple anabolic hormone replacement might also have beneficial additive or even synergistic effects.[11-13]

A notable study investigated whether supplementation with testosterone and GH together, in physiological doses, results in greater improvements in body composition and muscle performance in older men, compared to testosterone supplementation alone...

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Testosterone Thresholds and Muscle Mass Gains Needed to Enhance Muscle Strength and Function

In a previous article "Combined Testosterone and GH therapy for best results on body composition and safety profiles" I covered a study showing that testosterone replacement therapy alone produced significant gains in total lean body mass, leg/arm muscle mass, strength and aerobic endurance, together with significant reductions in whole-body and trunk fat. [1] 
 
In the same study, addition of GH (growth hormone) further enhanced these beneficial results. 
 
In a follow-up to that that study, the researchers looked deeper into the data with the following analyses: [20] 
 
- Pathway analysis to test the hypothesis that testosterone and GH affected muscle mass directly and that a threshold change in lean tissue (muscle) mass was needed to generate significant improvements in muscle performance and physical function. 
 
- Bootstrap analysis to determine threshold hormone levels associated with threshold changes in whole-body and appendicular lean mass that would be necessary for improving muscle performance and functional outcomes.
 
Here I report on the results of this insighful analysis...
 
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Nitrate supplementation – ramp up the less well-known NO pathway to boost performance and health

 

Nitric oxide (NO) boosting “pre-workout” supplements based on L-arginine have been – and still are – quite popular among many fitness enthusiasts and athletes. While it’s true that arginine is a nitric oxide (NO) precursor and NO is a potent vasodilator [1, 2], most studies in healthy adults have not unequivocally supported the marketing hype that arginine supplementation increases muscle blood flow and/or performance [3-5]. In my previous article “The Arginine Paradox” I explained why.
 
In this article I will cover the less well known, albeit highly significant, NO generating process, the nitrate-nitrite-NO pathway. This new NO producing pathway holds a lot of promise and supplements that target it will probably replace the current arginine based NO boosters in the near future[6, 7].
 
The nitrate-nitrite-NO pathway is especially interesting in that it not only has performance enhancing effects in healthy folks – as well as in people with risk factors – but also offers cardiovascular protection, regardless of baseline health status [7-10].
 
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Dr. Pierce's Medical Organization Affiliations

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