Methylene Blue

Synthetic dye with antioxidant and mitochondrial energy-boosting properties.

Also known as: Methylthioninium chloride, Basic Blue 9, CI 52015

What it is

Methylene blue is a synthetic organic dye and redox compound that has been used in medicine for over a century. In skincare, it's employed topically for its antioxidant and cellular energy-enhancing properties.

What it does

Methylene blue acts as an electron shuttle in mitochondria, potentially enhancing ATP production and cellular energy metabolism. It also scavenges free radicals and reactive oxygen species, reducing oxidative stress. These mechanisms may improve skin resilience, reduce inflammation, and support collagen integrity, with emerging interest in anti-aging and wound-healing applications.

The evidence

Evidence is emerging and primarily preclinical or in-vitro; human clinical data in skincare is limited. Studies show promise for antioxidant activity and mitochondrial function in cell models, but robust dermatological efficacy trials are lacking. Oral methylene blue has stronger clinical evidence in other medical contexts.

Best for

Aging, dull, or stressed skin; those seeking antioxidant support and potential cellular energy optimization.

Pairs well with

Vitamin C, niacinamide, peptides, and other antioxidants; synergistic with ingredients supporting cellular energy and collagen synthesis.

Use cautiously with

No major conflicts; however, use cautiously with other strong oxidizing or reducing agents that may interfere with its redox properties.

Cautions

May cause temporary blue staining of skin or textiles at high concentrations; generally well-tolerated topically, but patch-test first. Avoid ingestion of cosmetic formulations; oral methylene blue is prescription-only in some jurisdictions.