Build Muscle

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

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

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


Gaspari Nutrition

This powder formulation mixes easily with water and provides vitamin a (5000 IU), vitamin C (250 mg), vitamin D3 (1000 IU) and many more, plus minerals calcium (121 mg), iodine (75 mcg), magnesium (200 mg), zinc (15 mg) and others.

Get Gaspari Nutrition Anavite at the Muscle & Fitness Store >>



Shredz Supplements

Each two-capsule serving delivers a fat-burning blend with dendrobium, phenylethylamine (PEA), caffeine anhydrous, and green tea extract, helping you show off your abs while fueling your workouts.

Get Shredz Supplements Fat Burner >>




This pancake-and-waffle mix delivers 23 g of protein and 19 g of net carbs per serving. Just add water, milk or even coffee to create a batter that makes delicious pancakes that will drive muscle growth.

Get Mancakes >>




This advanced technology moisturizer contains proven ingredients to help men smooth the appearance of their skin, reducing visible lines and wrinkles. Sent to men only. Women received Nip+Fab Dry Leg Fix.

Get Nip+Man Manotox >>


BONUS: BlenderBottle

The same sturdy wire mixer ball and leak-proof seal, now with screw-on powder and pill compartments.



Jacked-in-a-Box members get the best deals on supplements, bar none. Sign up and you’ll receive:

  • At least 5 samples of new products (sometimes up to 10!)
  • A free workout from an M&F editor.
  • A full-year, print subscription to Muscle & Fitness, Muscle & Fitness Hers, FLEX, or Men's Fitness.
  • Free shipping on any order at The Muscle & Fitness Store and a promo code for $15 off your first $75+ order.
  • You’ll also get to write reviews to share with other readers—just like our editors.


Win an Xbox One

  • Join Jacked-in-a-Box by June 6 for your chance to win an Xbox One ($499.99 value).
  • You’ll receive a sample of Novex Biotech Endothil.
  • Write a review at The M&F Store to be entered to win an Xbox One.
  • For more information, go to