Which staining approach is commonly used to demonstrate glycogen by a carmine-based method?

• A. Best Carmine
• B. Mayer Mucicarmine
• C. Congo Red
• D. Giemsa

Answer: (A)

Glycogen is best visualized with a carmine-based approach that specifically targets polysaccharides in tissue. Best Carmine uses a carmine-alum complex that binds to glycogen, producing a bright red stain that highlights glycogen-rich areas clearly against the surrounding tissue. This makes it the preferred carmine-based method for demonstrating glycogen. In contrast, Mayer mucicarmine stains mucin-containing substances rather than glycogen, Congo red targets amyloid, and Giemsa is used for general cell and organism staining. So when the goal is to show glycogen with a carmine-based stain, Best Carmine is the appropriate choice.