Doctor's Corner

The GNC Medical Advisory Board Discusses Hot Health Issues

In this edition of the Doctor's Corner, GNC Medical Advisory Board members share valuable information and tips for helping you Live Well.

The members of our Medical Advisory Board are dedicated to using their in-depth knowledge and experience not only to partner with GNC on the development of products and new innovations, but also to serve you, the GNC customer, by acting as a trusted resource for information, education and recommendations. Get to know them, interact with them and turn to them as a go-to resource for your health and wellness needs.

Digest This by Frank J. Costa, M.D.

People often approach us MAB doctors as well as our GNC associates looking for help with what some of them consider to be an embarrassing topic...
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The Casein Scene by Victor R. Prisk, M.D.

One of our best-selling performance protein brands – not to mention one of my favorite GNC product lines – is growing again as GNC introduces Pro Performance® AMP Amplified Wheybolic Extreme 60™ Casein...
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Helpful Tools
Vitamin Guide

Vitamin Guide

Use this interactive tool to get an expertly designed supplement plan customized to your needs.
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Vitapak® Programs

GNC Vitapak® Programs

Check out all of our Vitapak® Programs to find the one that’s right for your needs and lifestyle.
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Find Your Fish Oil

GNC Fish Oils

Which Fish Oil is right for you? Use our interactive tool to find the product best suited to your needs.
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Find Your Probiotic

GNC Probiotics

Learn more about Probiotics, see our full product line and pick the one that’s right for you.
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What's Your Protein Number

Protein Number

Determine your body’s protein needs for maximum health and performance using our interactive calculator.
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Ask The Experts

Thanks so much to our visitors for their submissions to the “Ask the Experts” section of our MAB website. We receive a ton of questions about diet and fitness tips, so here is a collection of our most frequently asked questions.

Q. from Melissa: I was checking out your protein options online and am confused about the different offerings. What is the difference between whey, casein, egg and soy protein?

A. from Dr. Costa:

Thanks for the question, Melissa. Here is a quick breakdown for you:

  • Whey protein is a fast-absorbing protein for maximum performance and muscle growth and is best used before or after workouts.
  • Casein protein is a slow-absorbing, milk-based protein that delivers steady amino acids over time and is best used between meals or even before bed.
  • Egg protein is a highly digestible complete protein with fast nutrient delivery. It is lactose and gluten free and, unlike eggs, low in fat and cholesterol.
  • Finally, soy protein is a natural, plant-based, gluten-free, lactose-free protein, perfect for those on a vegan diet. It is a complete protein generally high in calcium.

To learn more about protein and which product might be best for you, check out our Protein Number tool and our line of GNC Pro Performance® proteins, which includes whey, casein, egg and soy options.

Q. from Aleighna: I'm trying to eat healthier and work out, but the vending machine at work seems to suck me in every afternoon after lunch because I get so hungry! I've heard a lot about products that help to control your appetite. Do they work?

A. from Dr. Prisk:

Many products contain fiber to control your appetite as they work, but it is important that you get balanced nutrition throughout the day as well. I would recommend a high-fiber snack such as a small veggie, plus some protein, which is great for appetite control. I eat salmon and a veggie at lunch because it has healthy fat, protein and fiber that help you feel full longer. Also, by avoiding simple sugars at lunch, I don't get the blood sugar crash that often sends you to the vending machine.

Some appetite-control supplements have a stimulant effect to improve metabolism. I would take them at lunchtime so you avoid the afternoon crash of taking them too early in the day. Sometimes I even split my dose into the morning and afternoon to keep a steady boost during the day. Some days I also turn to an alternative fiber and protein combo in the afternoon. I like GNC Total Lean™ Fiber Gummies and enjoy a GNC Total Lean™ Lean Shake™, which come in a variety of great-tasting, ready-to-drink flavors that I can grab and go.

Q. from George: After consulting with my doctor, I am now taking a multivitamin, an omega-3 fish oil and a supplement for joint discomfort. I hate taking these all at once because sometimes my stomach gets upset. Any recommendations?

A. from Dr. Prisk:

Great question George. In general, fat soluble vitamins like A, E, D and K are best taken with fats like omega 3s. Consider taking these with a meal during your day. Because there are so many joint supplements and each gave their own specific directions, it is best to follow those directions on the bottle. That said, since most joint discomfort comes with activity; consider taking these in the morning as it could be helpful for your daily activities. One more tip: Avoid taking your supplements before lying down. Remaining sitting or standing upright for at least 30 minutes after taking your supplements can help with digestion and absorption.

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Blog Feed

Stay up to date on the latest posts from the GNC Medical Advisory Board as they cover a wide variety of health
related topics.

Protein Spiking: How Does It Affect You?

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Vitality–Live a Successful Life

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Double Duty with Fiber and Probiotics

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Doctor’s Orders on Getting Your Daily Dose

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Doctor's Corner

Ask The Experts
The GNC Medical Advisory Board is wondering … what do you want to know about sports and wellness nutrition? Submit your suggested topics and questions here and check back each month to see what the doctors are talking about. Check out this month’s content!














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