05/04/2026
My patient with MCAS had been struggling with a rash on her neck that wouldn’t respond to anything.
She started using the Prequel Redness Reform Serum and it’s been the only thing to help, so I went deep on the ingredient list to figure out why. (NOT AN AD! I’m just curious)
Two ingredients stood out: Dipotassium Glycyrrhizate (DG) and α-Bisabolol.
Here’s the science (simplified):
In both MCAS and rosacea, there’s a cascade that goes: mast cell activation → histamine + inflammatory chemicals released → redness, flushing, irritation.
Most skincare just tries to cool things down after that happens.
These two ingredients work earlier in the process:
🌿 DG (licorice root) directly stabilizes mast cells: it reduces calcium influx into the cell, which is what triggers degranulation and histamine release. It also suppresses NF-κB signaling, which is a major inflammatory “on switch.”
🌼 Bisabolol (chamomile) hits the downstream part, suppressing the same inflammatory pathways (NF-κB, COX-2, cytokines like TNF-α and IL-6) that amplify the reaction after mast cells fire.
Together they’re covering two different points in the same inflammatory chain. That’s why the combination likely works better than either alone.
This is still mostly preclinical data, but the mechanistic rationale is solid and my patient’s skin agrees!
