Myo-Stack by Blackstone Labs claims to support muscle growth, prevent protein breakdown, and accelerate recovery. It contains an ingredient called "Ajuga Turkestanica," which is claimed to have anabolic, anti-catabolic, anti-proteolytic, and protein-sparing properties.
Let's break down some of the terms and concepts mentioned in the description:
 
Anabolic Compounds: Anabolic compounds are substances that promote the growth of lean muscle tissue by increasing amino acid uptake into muscle cells and enhancing protein synthesis. In the context of bodybuilding, these compounds are desirable because they help build and repair muscle tissue.
 
Anti-Catabolic or Antiproteolytic Compounds: These are substances that help prevent the breakdown of muscle protein. They work by reducing the loss of amino acids from muscle tissue. This is important because muscle breakdown (catabolism) can negate the gains made through muscle-building (anabolism).
 
 Myo-Stack, with its Ajuga Turkestanica ingredient, claims to create an anabolic environment within the muscles by increasing amino acid uptake, enhancing protein synthesis, and reducing protein breakdown. 
 
Supplement Facts
Serving Size: 1 Tablet
Servings per Container: 60
Amount per Serving DV%
Myostatin and Anabolic Proprietary Blend [Rhaponticum Carthamoides 100:1 Extract (Root), Ajuga Turkestanica Extract (whole plant)] 250 mg *
(25 R)-5alpha-spirostan-2alpha, 3beta, 5alpha-triol-6-OH 50mg *
*Percent Daily Values (DV) are Based on a 2,000 calorie diet
**Daily Value (DV) Not Established
Other Ingredients: Microcrystaline Cellulose, Phosphatidylcholine 75%, Hydroxypropyl Beta Cyclodextrin, Phytosterols, Magnesium Stearate, Silicate, FD&C Blue #2, FD&C Red #40.