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TB4 is classified as a research chemical in the United States and is not FDA-approved for human use outside clinical studies

Ng SP, Johnson JM, Gunn GB, Rosenthal DI , Skinner HD, Phan J, Frank SJ, Morrison W, Sturgis EM, Mott FE, Williams MD, Fuller CD, Garden AS

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Amazon should be commended for efforts over the last several years to drastically improve dietary supplement compliance policies now requiring validation of GMP audits, label claim and contaminant testing, and screening for active pharmaceutical ingredients in high risk dietary supplement categories like sports nutrition, weight loss, and sexual enhancement
