

💥 Crush softness, own your power with HARD.
Core Nutritionals HARD is a premium, stimulant-free hardening and recomposition supplement featuring research-backed ingredients like KSM-66, DIM, and L-Theanine. Designed to reduce cortisol, regulate hormones, promote fat loss, and enhance muscle definition, it offers a transparent, clinically dosed formula made in cGMP-certified U.S. facilities. Perfect for professionals seeking a balanced, effective edge in fitness and well-being.












| ASIN | B089WD943F |
| Best Sellers Rank | #60,293 in Health & Household ( See Top 100 in Health & Household ) #2,535 in Blended Vitamin & Mineral Supplements |
| Customer Reviews | 4.5 4.5 out of 5 stars (157) |
| Date First Available | June 9, 2020 |
| Manufacturer | Core Nutritionals |
| Product Dimensions | 2.5 x 2.5 x 4.5 inches; 3.53 ounces |
C**L
FANTASTIC PRODUCT
MUST HAVE FOR CORTISOL BALANCE AND ESTROGEN.
A**R
This is LEGIT!
I’m gonna be honest, at first I thought it was a bit of a placebo but, this is legit. I used it on the tail end of my prep and it was an absolute game changer. Within literally 48 hours after taking it I noticed a lot more hardness and dryness. Sleep was deeper, mood was better, and energy throughout the day was amazing. Highly recommend
C**W
actually works!!!
i’m a fitness competitor and when I get close to my show, I do start using this product about eight weeks out. It’s absolutely amazing and it does change your body composition with the right diet and the right training program. It lowers your cortisol levels which makes a difference in your body I would absolutely recommend this product, especially if you’re an athlete and you want that extra edge !!!
D**R
Highly recommend with a training protocol!
I noticed immediate tightening and strength increases with this supplement!
D**R
Best For Cortisol Balance
I take Core Hard in off season and deep in prep. Off Season I take 2x pills (1x AM and 1x PM). Really helps me balance my hormones and especially my cortisol levels. When I am deep into prep and competing for a show I take 2x pill 2x a days for maximum benefits. I even recommend this product to my female lifestyles clients. Everyone loves it. Helps you deal with stress and have productive sleep
T**.
Awesome🙏
Awesome product for the final push to competition!💯🙏
K**A
Yes yes yes
My coach recommended these to me. I’m a competitor in bodybuilding and I take these throughout prep. After day one I totally noticed a difference in my stress levels. Not sure if it’s a placebo but regardless I love these!
J**A
Stay away
Doesn't do anything for you
N**5
I’ve used tons of sleep aids over the years. I’ve tried them all. To my frustration, and thousands of dollars later; I found they all did almost nothing. Maybe they would work for one night, and then you would be back to square one. I have no idea why, but Core Hard works even better than promised. I found out about it through Paul Revelia. I figured I’d try it once. I’ve used all these ingredients separately, but somehow all together; they’re magic. I was hesitant at first, but I’ve been using it steadily for a few weeks and I’ve had the best sleep of my life. My progress at the gym has been amazing. I have plenty of energy for work. I literally had about 10 hours of sleep last night. I still have to pay attention to things like, turning off the lights a few hours before bed, and ensuring it’s cold at night, but there’s no doubt in my mind this works. It’s nothing short or amazing. I wish this didn’t contain DIM, as I am not a fan of DIM. A DIM-free version would be even better. But the effects are still undeniable. I wish I’d known about this a long time ago. Don’t hesitate, buy this!
Trustpilot
1 week ago
4 days ago