http://www.health-andme.com/hplc-muscle/
To better understand how the researchers to draw conclusions about the necessity and effectiveness of antioxidant supplements, knowledge their techniques is necessary. Basically, three methods are common to the assessment of the effectiveness of antioxidants in athletes: measuring the oxidized products or molecules, the extent of tissue damage, and finally, measuring the performance itself. Investigators can sample of serum, urine, breath or tissue samples for oxidized compounds generated as a result of the activity free radicals. These products include malondialdehyde (MDA), thiobarbituric acid reactive substances (TBARS), pentane and ethane, dienes conjugates and lipid hydroperoxides. Among these, liquid chromatography (HPLC) measurement of lipid hydroperoxides is the evaluation The most direct oxidative damage. Because of inconsistencies between these techniques and the variability of oxidized products, the best research takes into account more than one oxidation products and may investigate further support (eg, respiration and serum).
In addition to indices of oxidative damage, physiologists interested muscle damage and recovery was also measured damage indirectly through markers of cell damage. Since peroxidation of membrane lipids leads to abnormal cell membrane, May intracellular enzymes leak into the cell and blood plasma in damage antioxidant. These enzymes can be measured in blood as surrogate markers of damage to the cell membrane. The markers most commonly measured enzyme of muscle damage in the serum were as creatine kinase (CK), alanine aminotransferase (ALT, formerly known as SGPT), aspartate aminotransferase (AST, formerly SGOT) and lactate dehydrogenase (LDH). Muscle proteins may also be catabolized due to mechanical damage and oxidation, therefore, the urinary excretion of nitrogen can also be quantified. Taking the concept of nitrogen excretion In addition, the nitrogen balance (NBAL) studies and the same method of stable isotopes can be used to assess the damage caused by the degradation muscle protein.
Perhaps most relevant to an athlete's bottom line are a variety of performance tests that exercise can be used. They range from treadmill and cycle protocols on measures of strength. These tests can evaluate both the ergogenic benefits with [antioxidant] and supplementation the rate of recovery after episodes of heavy exercise. In essence, the practical effects of supplementation with antioxidants can be evaluated by determining whether the performance can be improved or if a high level of performance can be maintained with repeated episodes Exercise.
Considering the data obtained by one of the measures mentioned above, anomalies are often incompatible. Much inconsistent results in the exercise and free radical / antioxidant research may be attributed to the lack of uniformity in study design on the protocol, especially for performance tests. In evaluating this research, it is important to note the type, intensity and duration year used and the duration of the recovery period between crises. Since performance testing tends to produce results the most inconsistent in anti-oxidant, some authors have criticized the use of performance measures. The physical performance is a multifactorial process, and then testing performance in May would be a good indicator of the effects of supplementation with antioxidants. Although the exercise test may not be an extremely sensitive, many studies have shown positive effects of supplementation with antioxidants and therefore, if consistency protocol is tempted, perhaps the data should show more consistent results in a specific direction.
In addition to issues of protocol, populationspecific are important variables to consider. When evaluating the results of research anti-oxidant, it is important to note the type of population the subjects were drawn (eg, weight lifters, cyclists, runners, old and young, men, women, etc..) Of course, animals ex vivo (pre-treated human cells examined outside the body) or in vitro (in a test tube or dish) data are sometimes the only source of information available. In such cases, to recognize that humans may react differently but they are generally regarded as similar to that evidence to the contrary.
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5 HTP 60 Caps, 100 mg (Purity Assured by HPLC) – Jarrow Formulas $27.95 Jarrow formulas 5-HTP (5-Hydroxytryptophan) is an extract of Griffonia simplicifolia seeds from coastal West Africa and is verified to be free of the peak X contaminant. Purity is assured by HPLC. 5-HTP is the direct metabolic precursor of serotonin and is importantfor the production of melatonin…. |
