Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

Natural Cognitive Changes and Aging

Natural cognitive changes typically occur as people get older. Mild cognitive decline manifests itself through increased forgetfulness and difficulty in participating in conversations and affects many people commonly. What are the distinguishing factors between regular memory loss due to aging and severe cognitive disorders such as dementia? We will investigate cognitive decline by examining its genetic foundations and learning useful strategies to protect brain health.

Understanding Cognitive Decline

Age-related cognitive impairment represents a set of symptoms that affects memory functions and both attention and problem-solving abilities. These natural aging changes can advance into dementia which severely disrupts everyday life. Studies in genetics have revealed the hereditary aspects of cognitive decline. Scientific research indicates that genetic factors account for around 60-70% of the variation in people's cognitive abilities. Research shows that genetic variations that affect testosterone levels are associated with brain structure differences which reveal their impact on cognitive health. Multiple lifestyle choices and certain health conditions operate alongside genetic predispositions as contributors to cognitive deterioration. Aging and being female along with habits like smoking and physical inactivity as well as having less education heighten one's cognitive impairment risk. Heart disease and hypertension demonstrate how cognitive function can be affected by multiple health conditions which reveals the complex nature of cognitive wellbeing.

Actionable Strategies for Brain Health

1. Stay Mentally Active: Challenge your brain through activities like puzzles or reading books and learning new skills to keep your mind sharp. Mental exercises that engage your brain help maintain cognitive function.
2. Maintain a Healthy Lifestyle: Overall brain health requires individuals to follow a balanced diet and maintain physical activity while managing stress and ensuring they get enough sleep. Numerous studies demonstrate that routine physical activity improves cognitive performance while decreasing the likelihood of cognitive deterioration.
3. Socialize and Stay Connected: Developing social networks along with meaningful relationships leads to better cognitive health outcomes. Building emotional well-being requires maintaining connections with friends and family members.
4. Manage Chronic Conditions: Keeping high blood pressure, diabetes and high cholesterol under control helps safeguard brain function. Take the guidance of your healthcare provider to handle these medical conditions properly.
5. Seek Professional Guidance: Seek medical advice if you notice cognitive symptoms that worry you or if you have relatives who have experienced cognitive decline. Healthcare providers have the ability to evaluate cognitive function and deliver individualized recommendations while advising on genetic testing when necessary.

Conclusion

Preserving brain health through aging requires understanding how both genetic and lifestyle elements contribute to cognitive decline. To maintain cognitive function and overall well-being people should embrace practical strategies including mental stimulation healthy living social interaction and proactive healthcare management. To gain a better understanding of your genetic predispositions concerning cognitive health you should check out PlexusDx's Precision Health & Wellness tests. Genomic-based information from these tests enables individuals to make knowledgeable health decisions tailored to their unique genetic makeup. Discover how genetic testing can help you understand cognitive decline and boost your well-being by visiting PlexusDx.com or shopping at Amazon and Walmart. Genetic factors influence cognitive health yet active lifestyle choices and preventive healthcare practices create substantial effects on cognitive function. When you adopt a comprehensive approach to brain health you enhance your mental capabilities while experiencing a meaningful and energetic existence. Begin your path to improved cognitive health today by using Precision Health & Wellness tests from PlexusDx. Use genetic insights along with personalized health data to improve your well-being and boost your vitality.

Frequently Asked Questions

What everyday changes does the post describe as mild cognitive decline?

Increased forgetfulness and difficulty participating in conversations are the two examples the post gives. It frames age-related cognitive impairment as a set of symptoms affecting memory, attention and problem-solving abilities that many people experience as they get older. The post notes these natural aging changes can advance into dementia, which severely disrupts everyday life, but it does not set out diagnostic criteria.

Which non-genetic factors does the post say raise the risk of cognitive impairment?

The post names aging, being female, smoking, physical inactivity and having less education. It also points to health conditions including heart disease and hypertension as contributors, which it uses to illustrate how many different influences shape cognitive wellbeing. The message is that lifestyle choices and medical conditions operate alongside genetic predisposition rather than being overridden by it.

What does the post say about testosterone-related genetic variation and the brain?

It states that genetic variations affecting testosterone levels are associated with differences in brain structure, which the post presents as evidence of an influence on cognitive health. That is an observed association reported in research, not something that predicts an individual's cognitive future. The post gives no gene name for it, so it is best read as background rather than actionable information.

Which habits does the post recommend for protecting brain health with age?

Staying mentally active through puzzles, reading and learning new skills; maintaining a balanced diet, physical activity, stress management and adequate sleep; and staying socially connected through friendships and family relationships. The post also stresses managing chronic conditions such as high blood pressure, diabetes and high cholesterol under a healthcare provider's guidance, and cites routine physical activity as improving cognitive performance.

When does the post say cognitive symptoms warrant seeing a healthcare provider?

If you notice cognitive symptoms that worry you, or if relatives have experienced cognitive decline. The post says healthcare providers can evaluate cognitive function, deliver individualized recommendations and advise on whether genetic testing is appropriate. Note that a wellness genetic report does not diagnose dementia or tell you whether you will develop it; that assessment is clinical and belongs to your provider.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.