M-stak works. I used it for 3 months and my bench went from 150 to 350. I gained muscle and strength. It had absolutely no effect on my libido as others have stated. I do a cycle several times per year. I'm 55 and I'm still using it. It also promotes faster healing, efficient is really important for us older guys.
Verified purchase: Yes | Condition: New
Love this product! Universal/Animal products are well researched and deliver what they say!
Verified purchase: Yes | Condition: New
This is my second time on m stack following just over a week off. I'm very impressed. Will continue using it. Thanks
Verified purchase: Yes | Condition: New
I've used animal products several times over the years. It has always performed well.
Verified purchase: Yes | Condition: New
I’m been taking product for a week 30 minutes before my workout And I like it great energy and great pumps.
Verified purchase: Yes | Condition: New
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