Every month, Jacked-in-a-Box offers readers the chance to try a selection of new supplements without the expense of buying a full package of each product. In May, Jacked-in-a-Box provided members with samples of the following nine products.


Bsn advanced

BSN Advanced Strength N.O.-Xplode (Watermelon)

This version of BSN’s flagship pre-workout supp is more potent than ever. I can remember when it was first launched and how it changed the market forever. It’s still a front-runner in the pre-workout category today.

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Musclepharm assault
Musclepharm Assault (Watermelon)

MusclePharm Assault is aptly named, as it gives you the jolt you need to attack the weights. It includes critical pre-workout nutrients like CarnoSyn (beta-alanine), Con-Crēt (creatine HCL), citrulline malate, and taurine, to name a few.

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Musclemeds no bull
MuscleMeds No Bull

MuscleMeds’ new pre-workout contains nitric oxide in the form of eNoxide. This is a real nitric-oxide molecule bound to an amino acid carrier molecule, which, once ingested, dissociates and quickly releases real nitric oxide, dilating blood vessels and increasing pump.

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Formutech volatile
FormuTech Nutrition Volatile

This pre-workout includes ingredients like CarnoSyn (beta-alanine), arginine alpha-ketoglutarate, citrulline malate, and taurine. It also includes green coffee bean extract, which can help you burn more fat during workouts.

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Fat Burners


Usplabs oxyelite
USPlabs Oxyelite Pro

This fat burner gets its effectiveness courtesy of key ingredients like yohimbe and caffeine, which both work to free up fat from fat cells so that it can be burned away for good.

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Giant sports
Giant Sports Dexamine

Here’s a fat burner you’ll really feel. It contains key ingredients like caffeine, green tea extract, and synephrine, which have clinical research supporting their effectiveness and safety.

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Protein Bars


Premier protein
Premier Protein Crisp Bar (Peanut Butter Caramel)

It’s light like a cereal bar, but packed with 25 grams of protein. With 25 grams of carbs, 7g of fiber, and 5 grams of sugar alcohols, this bar won’t ruin your diet.

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Here are 11 Actual Cookies You Can Make Out of Quest Bars

Quest Protein Bar (Chocolate Chip Cookie Dough)

Few bars this size pack more than 20 grams of protein, and the 20 grams of carbs are 80% prebiotic fiber isomaltooligosaccharide, with no sugar alcohols.

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Amino Acids

Beast aminolytes

Beast Aminolytes

This amino acid product provides 6 grams of branched-chain amino acids, plus betaalanine. You can take it pre-, intra-, and/or post-workout for best results.

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