Centrophenoxine — The Lipofuscin Clearer
Centrophenoxine is a cholinergic nootropic and anti-aging compound best known for its ability to clear lipofuscin, a cellular waste product that accumulates with age. While it has demonstrated lifespan extension in mice and neuroprotective effects in older adults, its longevity benefits in humans remain unproven.
Mechanism of Action
Centrophenoxine (meclofenoxate) is an ester of dimethylethanolamine (DMAE) and 4-chlorophenoxyacetic acid (pCPA). It acts as a cholinergic nootropic by increasing the availability of choline and acetylcholine in the brain. In the context of aging, its primary mechanism is the reduction of lipofuscin, an age-related pigment that accumulates in post-mitotic cells like neurons. It also exhibits antioxidant properties, increasing the activity of enzymes such as catalase, superoxide dismutase, and glutathione reductase, thereby mitigating free radical-induced oxidative stress and lipid peroxidation in the brain.
Human Trial Evidence
Human trials are limited and mostly dated. A few older double-blind clinical trials in elderly patients with dementia or cognitive decline reported improvements in memory and cognitive function. However, there are no published human longevity trials demonstrating lifespan extension; evidence for longevity is restricted to animal models, where it has been shown to increase the lifespan of mice.
Dosing Protocol
250–1,000 mg/day is the most commonly used range, often divided into two doses. It is typically taken with food to improve absorption. Due to its stimulatory nature, it is best taken in the morning or early afternoon to avoid insomnia. As an unapproved drug in the US, it is sold as a dietary supplement, but it is a prescription drug in some European countries and Japan.
Safety & Contraindications
Centrophenoxine is generally considered safe and well-tolerated at standard doses. However, side effects can include insomnia, dizziness, restlessness, muscle tremor, depression, nausea, and headache, particularly at higher doses. Due to potential teratogenic effects associated with its DMAE component, it should be strictly avoided by women who are pregnant or of child-bearing age.