INTRODUCTION

Globally, increasing life expectancy has placed greater emphasis on maintaining cognitive health into older age. According to the World Health Organization, the number of people aged over 60 years is expected to double by 2050, increasing the prevalence of age-related cognitive decline and neurodegenerative diseases. Although occasional forgetfulness is a normal part of ageing, preserving memory, attention, processing speed and executive function has become a major public health priority.

Scientific research has demonstrated that cognitive ageing is influenced by numerous factors including genetics, cardiovascular health, physical activity, sleep quality, chronic stress, education and nutrition. Unlike genetic predisposition, many lifestyle factors are modifiable, providing opportunities to support long-term brain health through preventative strategies.

Nutrition has emerged as one of the most promising areas of cognitive research. The brain accounts for approximately 2% of total body weight yet consumes around 20% of the body's resting energy expenditure. To function efficiently it requires a constant supply of oxygen, glucose, essential fatty acids, vitamins, minerals and amino acids. Inadequate nutrition, chronic inflammation and oxidative stress can gradually impair neuronal function, reducing the efficiency of communication between brain cells.

Alongside a balanced diet, regular exercise and adequate sleep, interest has grown in naturally derived supplements that may support healthy cognitive function. Botanical extracts, medicinal mushrooms and essential fatty acids have been used for centuries in traditional systems of medicine, long before the biological mechanisms responsible for their effects were understood. Modern neuroscience has begun to investigate these traditional remedies using controlled laboratory experiments, epidemiological studies and randomised clinical trials.

Among the most extensively researched ingredients are Ginkgo biloba, Lion's Mane mushroom (Hericium erinaceus), Omega-3 fatty acids, Rosemary (Rosmarinus officinalis) and Shilajit. Although each differs considerably in origin and chemistry, they share a common feature: each influences one or more of the biological processes associated with healthy cognitive function, including cerebral blood flow, neuroplasticity, oxidative balance, inflammation and mitochondrial energy production.

Globally, increasing life expectancy has placed greater emphasis on maintaining cognitive health into older age. According to the World Health Organization, the number of people aged over 60 years is expected to double by 2050, increasing the prevalence of age-related cognitive decline and neurodegenerative diseases. Although occasional forgetfulness is a normal part of ageing, preserving memory, attention, processing speed and executive function has become a major public health priority.

Scientific research has demonstrated that cognitive ageing is influenced by numerous factors including genetics, cardiovascular health, physical activity, sleep quality, chronic stress, education and nutrition. Unlike genetic predisposition, many lifestyle factors are modifiable, providing opportunities to support long-term brain health through preventative strategies.

Nutrition has emerged as one of the most promising areas of cognitive research. The brain accounts for approximately 2% of total body weight yet consumes around 20% of the body's resting energy expenditure. To function efficiently it requires a constant supply of oxygen, glucose, essential fatty acids, vitamins, minerals and amino acids. Inadequate nutrition, chronic inflammation and oxidative stress can gradually impair neuronal function, reducing the efficiency of communication between brain cells.

Alongside a balanced diet, regular exercise and adequate sleep, interest has grown in naturally derived supplements that may support healthy cognitive function. Botanical extracts, medicinal mushrooms and essential fatty acids have been used for centuries in traditional systems of medicine, long before the biological mechanisms responsible for their effects were understood. Modern neuroscience has begun to investigate these traditional remedies using controlled laboratory experiments, epidemiological studies and randomised clinical trials.

Among the most extensively researched ingredients are Ginkgo biloba, Lion's Mane mushroom (Hericium erinaceus), Omega-3 fatty acids, Rosemary (Rosmarinus officinalis) and Shilajit. Although each differs considerably in origin and chemistry, they share a common feature: each influences one or more of the biological processes associated with healthy cognitive function, including cerebral blood flow, neuroplasticity, oxidative balance, inflammation and mitochondrial energy production.

Importantly, no single supplement should be regarded as a substitute for a healthy lifestyle or as a treatment for cognitive impairment. Rather, these natural compounds are increasingly viewed as part of a broader strategy to support healthy brain ageing alongside established lifestyle interventions.

Importantly, no single supplement should be regarded as a substitute for a healthy lifestyle or as a treatment for cognitive impairment. Rather, these natural compounds are increasingly viewed as part of a broader strategy to support healthy brain ageing alongside established lifestyle interventions.