Alpha Lactalbumin

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Alpha Lactalbumin

Postby Canuck Singh » Sat Sep 13, 2008 2:39 am

A recent study completed by researchers in the Netherlands has shown that the consumption of alpha-lactalbumin (a major fraction in whey protein) improves alertness and performance the next morning, particularly in people who don't sleep well at night.

This double-blinded, placebo-controlled study was conducted on two separate evenings and used 14 subjects who had trouble sleeping and 14 who did not. On each test night, all participants ate a standardized evening meal followed by either a whey-enriched milkshake or a regular (placebo) milkshake. An hour later they were given a dose of the same type of shake before sleep. Participants slept in the laboratory and were tested for alertness and performance the next morning.

Results showed a large increase in tryptophan availability after the whey-containing shake. The reports confirmed that morning alertness improved significantly when the participants drank the whey shake the night before. This was also accompanied by improved vigilance performance in the participants that usually didn't sleep well.

Source: Am J Clin Nutr, 81: 1026-1033, 2005
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Re: Alpha Lactalbumin & Sleep

Postby Canuck Singh » Sun Oct 26, 2008 10:15 am

The link between body fat and sleep habits just seems to be getting stronger. That is, lack of sleep is the variable often linked to people that have a high body fat percentage or find it difficult to lose unwanted weight.

Poor sleep habits, or simply not getting enough sleep, interferes with the regulation of hormones that control appetite. It also decreases muscle sensitivity to insulin. These two factors mean that people end up eating too much of the wrong foods and more calories are stored as fat.

Yet another new study has reported that overweight individuals consistently have poor sleep patterns. To optimize your muscle gains and fat loss efforts, switch the TV off an hour or two earlier at night and get more sleep.

Source: International Journal of Obesity, June 2008.
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Re: Alpha Lactalbumin

Postby Canuck Singh » Tue Oct 28, 2008 9:44 pm

Whey protein supplements may help you cope better with stress.1

Increased brain serotonin levels improve the ability to cope with stress, while a decline in serotonin activity is associated with depression. Tryptophan is the amino acid that increases serotonin levels in the brain. Its transportation into the brain is dependent on other amino acids with a neutral charge. This influences tryptophan exchange via the ratio of tryptophan to the sum of other large neutral amino acids. A diet high in proteins that have high amounts of tryptophan may theoretically increase brain serotonin levels.

R: Twenty-nine (29) highly stress-vulnerable subjects and 29 other subjects participated in a double blind, placebo controlled study where all subjects were exposed to various experimental stresses after the intake of a whey protein (lactalbumin) or a casein supplement. Changes in mood, skin conductance, cortisol levels and plasma tryptophan/amino acid ratios were all assessed before and after the stress tests.

The researchers chose to assess whey’s lactabumin protein fraction as it possesses one of the highest concentrations of tryptophan of any known protein. The scientists were interested to see if a protein supplement could induce favourable brain serotonin levels.

Whey protein supplement increased the plasma tryptophan/AA ratio by 48%. In the stress vulnerable subjects the whey protein decreased cortisol levels and reduced depressive feelings and improved their ability to cope with the tasks presented. Results obtained could only mean the whey protein supplement was able to increase brain serotonin levels. A protein supplement that is high in lactalbumin has a natural ability to increase brain serotonin levels that produce beneficial effects in every day situations.

In another study published this year, lactoferrin (a whey protein fraction) was shown to inhibit colon carcinogenesis in male rats treated with another carcinogenic chemical azoxymethane.3 Most importantly these protective effects were demonstrated with easy to achieve, realistic amounts of the lactoferrin; about the same as contained in high quality whey oligopeptide formulations. Both a mere 2% and 0.2% of total protein intake proved highly effective in offering protection from the carcinogen.
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