Build Muscle

Inside the May Jacked-in-a-Box Sample Box

In May, M&F Editors picked these supplements for Jacked-in-a-Box members to try.

Inside the December Jacked-in-a-Box Sample Box


Allmax displays the exact amount of active ingredients in razor8, including 5 grams of creatine and beta-alanine and efficacious amounts of arginine, agmatine sulfate, and yerba mate, among others.

Get Razor8 >>



This fat burner supports energy, mood, and focus with a blend of green coffee extract, caffeine anhydrous, Dendrobium nobile extract, and avena sativa extract.

Get LIV Hybrid Weight-Loss >>



Aminolytes contains 5 grams of BCAAs and 5 grams of Beast’s amino acid matrix, containing l-alanine, glycine, and others. The product’s electrolyte blend contains sodium-, magnesium-, and potassium-phosphate.

Get Aminolytes >>



Each serving of Isoburn contains a total of 20 grams of protein from whey and casein, plus the Isoburn Blend of green coffee extract, blue-green algae extract, banaba extract, and others.

Get Isoburn >>


SUPERPUMP 3.0Gaspari Nutrition

The nitro-strength complex in superpump 3.0 contains creatine monohydrate, inositol arginine silicate, and agmatine sulfate. Other ingredients include beta-alanine, BCAAs, tyrosine, choline, and caffeine.

Get Superpump 3.0 >>



Dark Matter Zero Carb Concentrate post-workout has prosynthagen peptide, a combination of amino acids that promotes anabolism and insulin release for faster recovery without carbs.

Get Dark Matter Zero Carb Concentrate >>


MATRIX 2.0Syntrax

Each scoop of matrix 2.0 contains 23 grams of protein from undenatured whey, micellar casein, and egg albumin. Also includes glutamine peptides, which promote recovery and support digestion.

Get Matrix 2.0 >>



Includes yohimbe and a fat catabolizer blend that includes caffeine an- hydrous, 4-amino-2 methylpentane citrate, and theacrine. Take upon waking, beginning with one capsule to assess tolerance.

Get MD2 Meltdown >>



Formulated for women, this pre-workout contains beta-alanine, lysine HCl, carnitine, and BCAAs, plus caffeine anhydrous, phenylethylamine, inositol, PABA, and others. (Sent to women.)

Get Uplift >>

Join Now!

In addition to the monthly box of supplement samples, mem- bers receive FREE shipping on all orders at the M&F Store, plus a FREE subscription to their choice of Muscle & Fitness, FLEX, Men’s Fitness, or Muscle & Fitness Hers. For more info, go to

Win an iPad

Join Jacked-in-a-Box by July 6 and receive a sample of VPX Redline White Heat. Then write a review at the M&F Store by July 31 for your chance to win!

For access to exclusive fitness advice, interviews, and more, subscribe on YouTube!