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Hjemmesiden: http://www.examine.com

Excerpt: Beta-Alanin
http://examine.com/supplements/Beta-Alanine/
Citat: "Beta-alanine supplementation, when administered to strength athletes, does not seem to enhance 1 rep maximal strength nor isometric strength in isolation[32] although this is somewhat contested, as the improvements in power over time in resistance trained males have been noted to have their rate increased with beta-alanine at 4.8g daily over 30 days.[108] Creatine supplementation may have its efficacy at improving peak power output enhanced by beta-alanine slightly.[1] Another study in Sprinters noted that while beta-alanine (4.8g for 4 weeks) was able to improve muscular endurance during repeated maximal contractions, it failed to exert improvements in power during a 400m sprint test.[109]

When power-related studies are subject to meta-analysis,[110] they have an effect size larger than placebo but this effect size fails to reach statistical significance. When these studies are pooled upon the basis of being less than 60 seconds (which excludes events like rowing[30]) the effect size fails to be different from placebo.

Improvements in acute power output have been noted but are much less reliable than the effects on longer duration exercise. Beta-alanine does not appear to significantly increase acute power output. It may however, enhance the accrual of power of a period of time, secondary to enhanced exercise volume."

Excerpt: Glutamine
http://examine.com/supplements/Glutamine/
Citat: "Glutamine is a very effective intestinal and immune system health compound, as these cells use glutamine as the preferred fuel source rather than glucose."

"It is generally touted as a Muscle Builder, but has not been proven to enhance muscle building in healthy individuals; only those suffering from physical trauma such as burns or muscular wounds (knife wounds) or in disease states in which muscle wasting occurs, such as AIDS. In these individuals, however, glutamine is effective at building muscle and alleviating a decrease in muscle mass typical of the ailment."