Scientists have discovered a substance that prolongs life, rejuvenates, and restores hair

Spermidine is a natural compound that scientists increasingly refer to as a universal life-extending agent. It is found in foods such as aged cheeses, mushrooms, legumes, as well as in breast milk and semen. Studies show that it can have beneficial effects on the body — from strengthening the heart to stimulating hair growth — due to the activation of autophagy, a process where the body cleanses itself of damaged cells.

As we age, spermidine levels in the body decrease, so it is often taken as a supplement. Longevity expert Leslie Kenny claims that the substance helps boost the immune system, reduce chronic inflammation, and may be beneficial in autoimmune diseases. Furthermore, a 2023 study showed that spermidine intake contributes to hormonal balance: testosterone levels increased in men, and progesterone and other hormones increased in women, which even helped with issues such as urinary incontinence.

Its positive effect on hair is also noted: spermidine can prolong the active growth phase and slow the appearance of gray hair. Compounds in spermidine help remove toxic proteins from the brain, such as amyloid-beta and tau proteins, thereby reducing the risk of Alzheimer’s disease and improving memory.

Regarding the heart, studies in both animals and humans have shown that spermidine supplements improve cardiac muscle condition and promote longevity. It also helps with fatty liver disease and lowers levels of harmful cholesterol and triglycerides.

Since it's quite difficult to get enough of the compound through food alone, experts recommend plant-based supplements. Kenny emphasizes that plant-based forms are safer and more effective than synthetic ones. One such product she mentions is Primeadine. Rich natural sources include mushrooms, spinach, legumes, broccoli, and aged cheeses.

Although spermidine is also present in semen, Kenny notes that its level strongly depends on a man's health, and still recommends plant-based sources as more reliable and ethical.

As a result, the substance is gaining more supporters in the biohacking community. Thanks to its wide range of benefits — from memory enhancement to hair beauty and heart support — it is considered one of the most promising compounds for those seeking longevity.