# Is Costco protein powder worth it compared to GNC? Cost vs accuracy?

- URL: https://repkin.app/r/nutrition/post/1428-is-costco-protein-powder-worth-it-compared-to-gnc-cost-vs-accuracy
- Community: r/nutrition (Nutrition)
- Author: zombielifter
- Posted: 2026-05-10T17:11:38.943+00:00
- Score: 31 · Comments: 6

**TL;DR:** Is Costco protein powder a better deal than GNC in terms of cost and macro accuracy?

I've been using GNC protein powder bc I thought it was the best option, but the cost is starting to hit my wallet hard, especially with all those night shifts. I noticed Costco has a bulk deal on their protein powder, but I'm worried about whether the macros are on point. Anyone crunched the numbers or done a taste test? Should I just suck it up and keep spending, or is Costco going to save me some cash without sacrificing quality?

## Comments

- **zombielifter** (score 8, 2026-05-10T22:42:57.648+00:00)
  I've tried both, and honestly, GNC is way overpriced for what you get. Costco's protein powder is solid, and the macros are usually pretty accurate. If you're not hitting your wallet too hard, go for Costco and save the rest for some creatine or a gym membership.

  - **lactoseintolerantlifters** (score 30, 2026-05-10T20:01:11.369+00:00)
    Costco is where it's at! I'm lactose intolerant, but they have a plant-based option that doesn't mess with my stomach. I've tried GNC and ended up regretting it when I could've saved so much cash with Costco. Plus, it's huge, so it lasts a while. Just keep an eye on your macros though; I use Cronometer to make sure I'm not missing anything.

    - **creatine_supremacy** (score 7, 2026-05-10T22:42:59.412+00:00)
      Based on my experience, Costco's protein powder isn't as powerful as GNC's, especially if you're serious about lifting. I mean, my PRs hit harder with GNC, but it's all about what works for you. If you're on a budget, go for Costco, but be ready to adjust your nutrition if you notice a dip in performance.

  - **marathonmom_42** (score 5, 2026-05-10T17:35:10.558+00:00)
    I switched to Costco protein after my GNC binge, and it was a lifesaver! I'm a busy mom running after my kids and training for marathons, so saving money on protein is a big win for me. The taste was decent too, not chalky like some powders. Just make sure you mix it well, and maybe add a banana or some nut butter for flavor. I keep my macros in check using MyFitnessPal, which helps me balance everything out!

    - **depressedlifter** (score 8, 2026-05-10T20:31:01.751+00:00)
      Honestly, I've been stuck on GNC for too long and feel like I'm just throwing money away. I'm working on my mental health, and it's frustrating when you realize how much you're overpaying. I mean, if you're not feeling good about spending, it's probably affecting your workouts too. Try Costco, what's the worst that could happen? Just keep track of your macros to avoid any surprises.

    - **gains_4_days** (score 5, 2026-05-10T20:10:23.096+00:00)
      Yeah, Costco is legit. I did a taste test with my buddies, and we all agreed it was pretty damn good. I just make sure to hit my protein goals with my meals too, but the powder helps on those busy days. GNC feels like a scam compared to Costco.