Phosphatidylserine and it’s Vital Role In Brain Function

Phosphatidylserine (PS) is a phospholipid, a type of fat molecule that is a key component of cell membranes, especially in the brain. Structurally, it consists of two fatty acids: glycerol, phosphate, and the amino acid serine. Phosphatidylserine plays a crucial role in cellular function, particularly in signaling pathways and maintaining cell structural integrity.

Though naturally produced in the human body, PS can also be obtained from dietary sources or supplements. In recent years, it has garnered attention for its potential benefits related to cognitive function, memory, and neurological health.

Biological Role of Phosphatidylserine

Phosphatidylserine is most concentrated in brain cells, where it helps maintain the fluidity and permeability of cell membranes. It also facilitates cell-to-cell communication and supports the functioning of neurotransmitters and receptors, which are essential for memory formation and learning.

One of PS’s most important functions is its role in apoptosis, or programmed cell death. When a cell undergoes apoptosis, phosphatidylserine flips from the inner to the outer layer of the cell membrane, signaling to the immune system that the cell should be engulfed and removed. This mechanism maintains homeostasis and prevents inflammation (Fadok et al., 1992).

Sources of Phosphatidylserine

Natural dietary sources of phosphatidylserine include organ meats like liver and kidney, soybeans, white beans, and egg yolks. Historically, PS supplements were derived from bovine brain tissue. However, due to concerns over prion diseases like mad cow disease, most modern supplements are derived from plant sources such as soy lecithin or sunflower.

Cognitive Benefits

Numerous studies suggest phosphatidylserine may support cognitive health, particularly in aging populations. It is believed to help preserve memory and reduce mental decline associated with aging and neurodegenerative diseases such as Alzheimer’s disease.

A landmark study by Crook et al. (1991) found that elderly individuals with cognitive impairment who took 300 mg of phosphatidylserine daily for 12 weeks showed improved memory and cognitive function compared to a placebo group. Subsequent studies using soy-derived PS (Richter et al., 2010) reported similar findings, which found improvements in memory and mood among elderly subjects.

Moreover, a 2015 review published in Nutritional Neuroscience concluded that PS supplementation “may benefit memory, mood, and cognition in the elderly,” though it emphasized the need for larger, more rigorous studies (Glade & Smith, 2015).

Sports Performance and Stress Reduction

In addition to cognitive support, phosphatidylserine has shown promise in improving athletic performance and reducing exercise-induced stress. Kingsley et al. (2006) demonstrated that athletes who supplemented with 750 mg of PS daily experienced reduced cortisol levels following exercise. Cortisol is a stress hormone that, in excess, can impair recovery and muscle building.

Other studies suggest PS may reduce perceived stress and improve mood in high-pressure situations, possibly by modulating the hypothalamic-pituitary-adrenal (HPA) axis and reducing stress hormone production (Hellhammer et al., 2004).

Safety and Dosage

Phosphatidylserine is generally considered safe when taken at doses up to 300 mg daily for up to six months. Some individuals may experience mild side effects such as stomach upset or insomnia, particularly at higher doses.

As with any supplement, it is essential to consult a healthcare provider before beginning PS supplementation, especially for individuals with underlying medical conditions or those taking medications.

Potential in Neurodegenerative Diseases

Given its role in brain function, PS has been investigated for potential benefits in treating conditions such as Alzheimer’s and Parkinson’s. While preliminary studies show promise, results are mixed. The European Food Safety Authority (EFSA) 2011 concluded that there was insufficient evidence to support a cause-and-effect relationship between PS and cognitive function in the general population.

Nonetheless, ongoing research continues to explore its utility, particularly in combination with other nootropic compounds or lifestyle interventions.

Conclusion

Phosphatidylserine is a naturally occurring phospholipid that plays a vital role in brain function, cell signaling, and membrane integrity. It has been widely studied for its cognitive benefits, especially in older adults, and also shows potential in reducing stress and enhancing athletic performance. While existing research is promising, more large-scale, well-controlled trials are necessary to validate its benefits fully.

For individuals seeking to support their cognitive health or manage stress, phosphatidylserine may be a valuable addition to a comprehensive wellness plan when used responsibly and under medical guidance.

References

• Crook, T. H., Tinklenberg, J., Yesavage, J., Petrie, W., Nunzi, M. G., & Massari, D. C. (1991). Effects of phosphatidylserine in age-associated memory impairment. Neurology, 41(5), 644–649.
• Fadok, V. A., Voelker, D. R., Campbell, P. A., Cohen, J. J., Bratton, D. L., & Henson, P. M. (1992). Exposure of phosphatidylserine on the surface of apoptotic lymphocytes triggers specific recognition and removal by macrophages. Journal of Immunology, 148(7), 2207–2216.
• Glade, M. J., & Smith, K. (2015). Phosphatidylserine and the human brain. Nutrition, 31(6), 781–786.
• Hellhammer, J., Hero, T., Franz, N., Contreras, C., Schubert, M., & Hubert, W. (2004). Effects of soy lecithin phosphatidic acid and phosphatidylserine complex on the endocrine and psychological response to mental stress. Stress, 7(2), 119–126.
• Kingsley, M. I., Wadsworth, D., Kilduff, L. P., McEneny, J., Benton, D., & Kilduff, L. P. (2006). Effects of phosphatidylserine on exercise capacity during cycling in active males. Medicine & Science in Sports & Exercise, 38(1), 64–71.
• Richter, Y., Herzog, Y., & Cohen, T. (2010). The effect of phosphatidylserine-containing omega-3 fatty acids on memory abilities in subjects with subjective memory complaints: a pilot study. Clinical Interventions in Aging, 5, 313–316.