Responsive
Responsive, timely shipping
By Rusty S.
Saturday, November 7, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
639 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Blackstone Labs makes the most hardcore supplements for gaining mass, building muscle, lean gains, cutting, and getting big.
Blackstone Labs (blackstonelabs.com) has 639 customer reviews on The Fair Hearing, with an average rating of 4.6 out of 5.
639 approved reviews, newest moderated first
Responsive, timely shipping
By Rusty S.
I use harmonize and had the opportunity to also try paraburn and my experience has been nothing short of amazing. My appetite has changed drastically making dieting a breeze. Definitely worth the money!!!
By Liz N.
The Pre-workout is awesome
By Eli G.
Blackstone Labs always delivers 💯
By Mathew B.
Ordering from Blackstone Labs was an absolute breeze—super easy website to navigate, smooth checkout, and everything was crystal clear from start to finish. I placed my order and was genuinely impressed by how fast it shipped—way quicker than expected! But the best part? The products. Phenomenal results. These supplements actually work. I’ve tried a lot of different brands over the years, and nothing has delivered like Blackstone Labs. You can tell they’re serious about quality and effectiveness. If you’re on the fence, don’t be—these guys are the real deal. Fast, reliable, and most importantly, their products back up the hype. I’ll definitely be ordering again!
By Eric B.
Quick order turn around. Excellent products
By Mark K.
Items showed up at a reasonable time
By Eddy R.
Blackstone Labs is the only workout supplement company that I trust. I have been using there products for at least 5 years and the pre-workout still hits hard!
By Paul W.