When considering a pre-workout supplement, it is important to think about your goals and the type of exercise you normally take part in.
Projected Efficacy Testing Summary Labdoor tested 51 best-selling pre-workout supplements in the United States for active and inactive ingredient content and heavy metal arsenic, cadmium, lead, mercury contamination.
For products with specified quantities, actual active ingredient content ranged from being Only 2 of 51 products tested had formulations in which all of their claimed active ingredients were measured to meet levels established in research to be effective. Of the 24 products that did not specify caffeine content, 5 exceeded mg per serving, more than 3 times the caffeine content in an average cup of coffee.
Pre-workout supplements were generally heavy on potentially harmful ingredients. Products from manufacturers previously cited by the FDA for using illicit stimulants were also screened by HPLC for illicit stimulants.
For products with specified quantities, actual amounts of active ingredients ranged from being Those products that did specify ingredient quantities still varied greatly in their labeling accuracy.
Of the 24 products that did not specify caffeine content, 14 exceeded mg per serving, equivalent to more than 2 times the caffeine in some popular energy drinks.
Label accuracy was an issue even for those products that specified caffeine content. Products ranged from having only For products with specified creatine amounts, creatine content ranged from being Of the amino acid ingredients tyrosine, beta-alanine, arginine, taurinearginine had the largest range of label accuracy.
In the 4 products that specified arginine quantity out of 24 products with measureable arginineproducts ranged from only having Overall, actual content measurements for active ingredients caffeine, creatine, tyrosine, beta-alanine, arginine, taurine in products specifying quantities of those ingredients deviated an average of According to FDA guidelines, food products with less than 0.
In this batch analysis, 22 products measured 0. Product Purity All 51 products passed heavy metal screens for cadmium, lead, mercury, and inorganic arsenic based on Safe Harbor Levels published in California Proposition All of the tested products passed heavy metal screens for cadmium, lead, mercury, and inorganic arsenic.
Currently, intake limits for total arsenic have only been established for drinking water. The only available guideline for arsenic in supplement products is a proposed limit from CA Prop 65 on the inorganic component of total arsenic.
Generally, inorganic arsenic species tri- and penta-valent arsenic are considered more toxic than their organic counterparts.
Chemical analysis of this batch of products measured arsenic in total. Nutritional Value Products performed fairly well in terms of fat, carbohydrate, and sugar content, recording an average of The majority of the pre-workout products in this batch recorded similar nutritional value scores, with only minimal variation in calorie, fat, carbohydrate, and sugar content.
Except for Vega Sports Pre-Workout Energizer, all products measured less than 6 g of added sugars per serving. While some research evidence suggests that carbohydrates increase creatine uptake by muscle cells, we discourage excessive intake of added sugars for this purpose.
Ingredient Safety 40 of 51 tested products contained flagged ingredients ranging from artificial sweeteners and coloring agents to potentially carcinogenic preservatives and an amphetamine analog.
There is no established UL value for beta-alanine intake, but clinical studies recommend repeated small doses of 2 g throughout the day compared to single g bolus doses to avoid the side effect of paresthesias, or tingling, in the arms, head, and neck.
Of the 42 products with measurable beta-alanine content, 8 products contained more than 2 g of beta-alanine per serving.TFSupplements is a leading authorized online retailer of discount bodybuilding pre-workout supplements. Buy BSN Cellucor, Musclepharm, BPI Sports, GAT, Optimum Nutrition.
The best pre-workout supplement has a mix of clinically proven ingredients to supercharge anaerobic strength and to improve endurance. Labdoor analyzed 51 best-selling pre-workout supplements in the United States for active and inactive ingredient content and heavy metal .
The best pre-workout supplements. Men’s Health picks the top pills and powders to rev you up before a workout By Alex Ferentinos Posted on June 14, Purpose. While different pre-wrokout supplements make different claims, their main purpose is to supposedly help you get more out of your workout by increasing .
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