Best GNC Workout Supplements Review 2019

Updated January 15, 2019

GNC has an 80 year history in the supplement market. Today, they are the premiere bricks and mortar retailer of supplements in the United States, as well as having a huge online presence. GNC stock a range of brands but also have their own range of products. In this article we highlight the best products in the GNC range. We also compare the top GNC products with the best of the rest.

The Best GNC Products

GNC AMP Mega Men

GNC AMP Mega Men Multi Vitamins is a fat shredding pack that contains 4 powerful blends designed to work together to provide a powerful cumulative effect. The Mega Men Sport blend is packed with critical vitamins and minerals that are often missed by athletic men. The CLA complex includes 4000 mg of CLA, which maintains healthy body composition and supports lean muscle growth.

The GNC AMP Mega Men contains Amplified Creatine 189, which absorbs better and requires less. The anabolic primer and and anti-inflammatory support features high quality anabolic primers to help pack on mass combined with anti-inflammatory support.


  • Amplified Creatine 189
  • Anabolic Primers
  • Anti-inflammatory support


  • Expensive
GNC Pro Performance 100 Whey Protein

GNC Pro Performance 100 Whey Protein is a unique blend of muscle building protein and thermogenic fat burning agents. Each serving delivers 24 grams of whey protein, 6 grams of fiber and 3 grams of BCAAs.

The protein blend is a mixture of whey concentrate and whey isolate. GNC sources its protein from Glambia, which is the same place as Optimum Nutrition and Isopure, so you can be assured that the quality is on par with those brands.

There are artificial sweeteners in this product. It also has quite a high carb count. Finally, there are no digestive enzymes in this blend. As a result, those who are lactose intolerant may have problems with this product.


  • 24 grams of protein
  • 6 grams fiber
  • 3 grams BCAAs


  • No digestive enzymes
GNC Mega Men Multivitamin Capsules

GNC Mega Men Multivitamin Capsules are a calorie burning multi vitamin pack designed to get your ripped while it supports super health. The blend includes a men’s multivitamin formula with proven ingredients to help support colon and prostate health. A full range of B vitamins are included for energy production. Key thermogenic boosters are designed to boost the metabolism so you can burn more calories all day long.

Nootropic ingredients are included in GNC Mega Men Multivitamin Capsules to sharpen mental focus. The product is also packed with antioxidants to ward off the free radicals that are produced through exercise. Each serving also contains 1600 IU of Vitamin D.


  • Key thermogenic booster
  • 1600 IU Vitamin D
  • Sharpens mental focus


  • Leaves an after-taste
GNC Total Lean Bar

GNC Total Lean Lean Bar is a hunger satisfying high protein meal bar. Each bar contains 15 grams of protein, 180 calories and 19 grams of fiber. There are 21 grams of net carbs in this bar. 9 grams of that are sugar. This bar has a great taste and feels very satisfying. 


  • 15 grams of protein
  • 180 calories per bar
  • 19b grams of fiber


  • 9 grams of sugar
supplements capsules

GNC Mega Men Prostate and Virility is a booster of prostate health, testosterone and sexual function. It includes several blends that work together to boost overall virility and energy. It provides 1600 IU of Vitamin D for colon health and immune support. Key ingredients such as saw palmetto and lypocine boost prostate health and normal urinary flow.

GNC Mega Men Prostate and Virility is fortified with L-Arginine to boost nitric oxide production, allowing for the opening of the blood vessels. This promotes sexual virility and performance. The timed release caplets in which the ingredients come ensures a sustained release of multivitamins and minerals through the day.


  • 1600 IU of Vitamin D
  • L-Arginine
  • Timed release caplets


  • May cause dizziness

GNC Alternatives

While GNC carry a wide range of supplementary products across all workout applications, some people consider it to be a generic brand. They prefer products that are produced by higher profile specialised supplement manufacturers. Here are three alternatives to GNC that you might consider.​

MuscleTech Hydroxycut SX 7

provides nootropic benefits. The ingredients are dosed clinically and intended to work synergistically to provide a powerful cumulative effect. It includes such proven fat burners as satsuma orange and thiamine, along with coleus to enhance your mental focus.

MuscleTech Hydroxcut SX7, Black Onyx also includes green coffee to provide a stimulant free energy boost that won’t give you the jitters or leave you with a headache.

Find the best products to fuel your muscles with our Best Amino Acid Supplements for Working out Review 2019 feature.


  • Coleus
  • Thermogenic boost
  • Extreme energy booster


  • May cause stomach upset
Whey protein isolate

Optimum Nutrition’s 100% Whey contains 24 grams of pure whey protein powder per serving. That protein has miniscule levels of lactose, fat and cholesterol. With each serve, you get 5.5. grams of the branch chain amino acids (BCAAs) leucine, iso-leucine and valine. You also get 4 grams of glutamine.

Optimum Nutrition’s 100% Whey has been instantized to make it a great mixing product. You can put it together with nothing but a glass and a spoon. It won’t produce any clumpiness or leave a gritty residue in your cup. You can choose from more than 20 delicious flavors. This is a very effective post workout muscle builder and energy replenisher.

Ready to get peeled? Don’t miss our Best Cutting Supplements to Get Ripped Fast Review 2019 article feature.


  • 20 flavors
  • 5.5 grams of BCAAs
  • Great mixability


  • No creatine
metabolic accelerator

TwinLab Ripped Fuel 5X is a powerful metabolic accelerator which is designed to boost the metabolism 24/7 for advanced fat burn. It makes use of 5 advanced mechanisms to super-charge the thermogenic effect. This product is ephedra free and contains less caffeine than a cup of coffee. That means that it is able to provide a huge energy and fat burning effect without such side effects as jitteriness, nausea and feelings of anxiety.

Whereas many products, including those from GNC, require taking multiple tablets per day, with TwinLab Ripped Fuel 5X you only have to take two small, easy to digest tablets each day. All of the ingredients in this product are clinically proven and dosed to provide the best results.

For a complete breakdown of the top supps across all categories, check out our Top Gym Supplements 2019 Review super feature.


  • Powerful metabolic accelerator
  • No jittery side effects
  • Only requires taking 2 tablets per day


  • May cause stomach upset


GNC are a global brand who carry supplements from other retailers as well as their own brands. Our favorite GNC supp is GNC AMP Mega Men, which contains Amplified Creatine 189 and anabolic primers. The best muscle building supplement at GNC is GNC Pro Performance 100 Whey Protein, which delivers 24 grams of protein per serve, along with 6 grams of fiber.

Rounding out our top 3 GNC products is GNC Mega Men Multivitamin Capsules, which is a powerful thermogenic booster that also delivers 1600 IU of Vitamin D and enhances mental sharpness.

As alternatives to GNC, we recommend MuscleTech Hydroxycut SX7 Black Onyx for extreme thermogenesis and energy enhancement.Optimum Nutrition’s 100% Whey doesn’t contain as much protein per serve as GNC’s whey protein product, but it does deliver 5.5 grams of BCAAs, has great mixability and comes in a range of flavors. TwinLab Ripped Fuel 5X is a great option if you’re looking to strip off the last vestiges of body fat to reveal your shredded muscles.

GNC AMP Mega Men

Our #1. Recommendation

GNC AMP Mega Men

jim roose

My name is Jim Roose. I'm a former competitive power lifter and gym owner. I've bought millions of dollars of fitness equipment over the last 20 years. This site is my way of giving back to the fitness community that's done so much for me. Every article on here is carefully researched and written by me. Leave a comment if you have any questions.