GNC Mason City

02/20/2026

Meet Burn 2.0 🔥 A next-level thermogenic that converts fat to fuel and ignites your metabolism. Now available in our McKay Family GNC stores!

If you’re looking to sweat more, move more, and stay dialed in while cutting, Burn 2.0 is your go-to.

01/16/2026

Your Month, Your Flavor of Lean Whey Protein ✨

Some of the best flavors in the game - crafted with hydrolyzed and isolate whey protein for maximum absorption and added fat-metabolizing ingredients for a little extra lean support. 💪

Revolutionize your protein goals at your local, family-owned McKay Family GNC store!

01/06/2026

Two stacks. One goal: Feeling Better Every Day ☀️Tailored for You in a His & Hers Wellness Stacks.

Take an EXTRA 10% Off our Everyday Low Price for PMD, NDS Nutrition, and Siren Labs - Get 20% Off Nugenix, Ultimate Forza, and MuscleSport, and 30% Off GNC Brands for our New Year Sale!

The right combination can make all the difference.

01/05/2026

Shred Season Starts With the Right Stack 🔥💥 Save big with this stack for an energy boost, cravings control, and boosted fat metabolism.

Take an EXTRA 10% Off our Everyday Low Price for PMD, NDS Nutrition, and Siren Labs - Get 20% Off Doctors Preferred, and 30% Off GNC Brands for our New Year Sale!

The right combination can make all the difference.

01/03/2026

Stack your Mental Health Essentials ✨AND save while supporting your focus, mood, and sleep. 🧠 Get 20% Off Codeage, BetterAlt, and 30% Off GNC Brands for our New Year Sale!

The right combination can make all the difference.

01/03/2026

Stack the Savings - Stack Your Results 💪 Jump into 2026 ready for anything that comes your way!

⭐️ 30% OFF GNC Brand - Multis, VitaPaks, Fish Oils, and MORE!

⭐️ 20% OFF Best Sellers - Axe & Sledge, BetterAlt, Bucked Up, Codeage, MuscleSport, NutraBio, Rival, SDC, Ultimate Forza.

⭐️ 10% OFF Red Tags - FitLife, NDS, PMD, & Siren Labs at an EXTRA 10% off their everyday low prices + Clearance Items up to 60% OFF!

Only at your Local, Family-Owned GNC.

Offer valid 1/2/26-1/6/26

12/22/2025

Let’s Make Protein Cookies! 👩‍🍳🍪 Protein powder isn’t just for shakes - bake it, mix it, cook with it, and turn everyday recipes into high-protein favorites that actually taste amazing ✨

The Recipe: 🍪
Preheat Oven to 360
Mix Together
- 1 (120g) Ripe Banana
- 1/2 Cup (125g) Peanut Butter
- 2 Scoops (160g) Protein Powder
Bake for 10-15 Min.
Top With Sea Salt

11/28/2025

Black Friday & Small Business Saturday Deals at GNC 🤩

11/26/2025

Get $20 Off Any Purchase of $75 or More! 🥳 Oh… and don’t forget to combine it with the Storewide BOGO 50% Off Sale 🤯 Just Include one GNC branded Item!

Did we mention the $0.90 Ghost Energy Drink sale?

Offer valid this Friday and Saturday 11/28/25 - 11/29/25!

11/25/2025

11/07/2024

There’s work being done to our parking lot today. Please access us by parking at or

07/13/2024

🎄Ho, Ho, Ho! It’s Christmas in July. Today through Wednesday, at your local GNC! We’ll probably land ourselves on the naughty list with a sale like this. But shopping local is sure to keep you on the nice list 😌