Density 150 Tabs by Beverly Internatonal was gone for a while now is back here at SupplementToGo.Com more potent than ever we beleive there are 5 Reasons Advanced Bodybuilders Love This Supplement.1.High Anabolic Efficiency: When your muscles are thick, lean and hard you have the look of muscle "density". Everyone wants muscle density -but look around-how many of us actually have it?Achieving muscle density requires increasing the protein content of your muscle cells, which in turn requires stimulating protein synthesis well above normal on a consistent basis (refer to "The Density Cycle" diagram). All other things held constant, the more protein your muscle cells contain per unit of volume, the thicker, leaner and harder your muscles will appear.Anabolic Efficiency (AE) may be a new term for many readers. AE refers to the ability of a nutritional supplement to stimulate protein synthesis per unit mass (e.g. gram) of it that is ingested. As you might expect, advanced bodybuilders need high-AE supplements.A combination of highly purified essential amino acids such as occurs in the nutritional supplement Density can support a higher AE than may be found with proteins when consumed before and after resistance exercise (i.e. pre- and post-training). This promotes the increases in muscle cell protein content that you need to achieve the look of muscle density. 2. Laboratory-Tested, Pharmaceutical Grade: Advanced bodybuilders take comfort in the fact that Density is a pharmaceutical-grade amino acid formula capable of supporting a high AE. This has been confirmed by independent laboratory testing. Other products on the market have been tested and found to contain animal grade amino acids. Animal grade is the lowest grade on the market, unsuitable for use by scientists engaged in research and development, let alone advanced bodybuilders seeking measurable increases in muscle density.When 6 amino acid formulas on the market where tested, 5 of them were found to be of animal grade. These disappointing test results suggest that unless you choose a proven formula, the odds of you experiencing satisfying results are poor.3. Contains L-tryptophan: Each serving of Density supplies 8 dietarily essential and 10 dietarily non-essential amino acids*, including L-tryptophan. L-tryptophan is an essential amino acid and is required for protein synthesis as well as the synthesis of niacin and serotonin. When an amino acid formula lacks L-tryptophan it will have a much lower AE. Advanced bodybuilders cannot expect visible muscle building results from using it.Laboratory tests performed on Density reveal that its L-tryptophan is highly purified, pharmaceutical grade material. Other products were tested and found to contain numerous impurities. Impurities may render an amino acid formula ineffective or, worse still, unsafe. As one supplement formulator with years of industry experience recently stated "the lack of pharmaceutical-grade] L-tryptophan