A compound found in sea squirts, known as plasmalogens, has shown promising effects in reversing some signs of aging in older mice, according to a recent study. Researchers from Xi'an Jiaotong-Liverpool University, Stanford University, Shanghai Jiao Tong University, and the University of Chinese Academy of Sciences found that plasmalogen supplements improved memory, strengthened brain cell connections, reduced inflammation, and even helped mice grow thicker, darker hair. The study, published in Frontiers in Molecular Biosciences, highlights the potential of these compounds in addressing age-related decline. Sea squirts, or Ascidiacea, are marine animals often consumed in parts of Asia, such as Korea and Japan. These creatures are rich in plasmalogens, a type of lipid crucial for the structure and function of cell membranes, particularly in the brain, heart, and immune system. As people age, plasmalogen levels tend to decrease, and lower levels have been linked to neurodegenerative diseases like Alzheimer's and Parkinson's. To explore the effects of plasmalogens on aging, the researchers added the compounds to the diets of older mice. The results showed significant improvements in the mice's learning and memory, as tested using the Morris water maze, a common method to assess spatial memory. The treated mice performed more like younger mice, finding a hidden platform much faster. Additionally, the mice had more synapses—junctions where nerve cells communicate—and those synapses appeared healthier than those in untreated mice. Brain inflammation, which can impair cognitive function, was also reduced in the plasmalogen-treated group. Professor Lei Fu, who led the study, suggested that plasmalogens may not only halt cognitive decline but could also reverse some impairments in the aging brain. He noted that the mice fed plasmalogens grew new black hair that was thicker and shinier than those without the supplement. However, the exact mechanisms behind these effects remain unclear. Possible explanations include the promotion of molecules that support neuron and synapse development, as well as the increased flexibility of synaptic membranes. Professor Fu also mentioned the potential role of the gut-brain connection, where plasmalogens might influence the gut microbiome, which in turn affects brain health. While the findings are encouraging, it is important to note that the study was conducted on mice, and it is not yet known whether plasmalogens would have similar effects in humans. More research is needed to determine the safety and effectiveness of plasmalogen supplementation in people before it can be considered a viable anti-aging treatment.