Books by Dr. Robert Peterson MD

Explains the biological causes behind graying, thinning, and hair loss — the roles hormones, inflammation, and cellular aging play — and separates which treatments are backed by clinical evidence from those driven by marketing.

Draws on clinical experience in functional medicine, neuroscience, and longevity research to explain what's really behind memory loss, brain fog, and fatigue — and what can be done to protect cognitive resilience.

Blends ophthalmology, longevity science, and emerging technologies to explain how vision changes with age and what current research shows about preserving it.

Covers how the inner ear changes over time and why hearing decline has consequences well beyond hearing itself — including cognition and balance — plus what's actually proven to help.

Explains how the throat, vocal cords, and swallowing mechanics change with age — and why protecting them matters for nutrition, speech, and quality of life.

Explains how the sense of smell changes with age and why it's often one of the earliest, most overlooked signals of broader neurological change.

Draws on dentistry, microbiology, and longevity science to explain how the mouth changes with age — and its underappreciated role in long-term, whole-body health.

Goes beyond the cosmetic to explain the anatomical and dermatological shifts behind facial and neck aging — and what's known about preserving structure and function, not just appearance.

Blends pulmonary medicine, physiology, and longevity science to explain how lung function declines with age and what's proven to help preserve it.

Draws on cardiology, physiology, and longevity science to explain how the heart changes with age and how its decline can often be influenced rather than simply accepted.

Surveys the liver's central role in metabolism and detoxification, the gallbladder's contribution to digestion, and the spleen's immune function — and how each changes with age.

Explains how kidney function declines with age, why early changes often go unnoticed, and what can be done to support filtration, blood pressure, and metabolic health.

Explores how the digestive tract changes with age and why gut health is central to nutrient absorption, immune function, inflammation, and metabolic resilience.

Reframes body fat as a dynamic endocrine organ, explaining how adipose tissue influences hormones, inflammation, metabolism, and the pace of aging.

Covers how breast tissue changes across the decades, what screening evidence actually supports, and how hormones and body composition shape long-term risk.

A clear, evidence-based guide to how the female reproductive system changes across the lifespan — from menstrual health and fertility to perimenopause, menopause, and long-term pelvic wellness.

Explains how male reproductive anatomy and hormones change with age, what prostate and sexual health screenings actually show, and how to preserve vitality and function over the long term.

Covers the biology of bone remodeling, cartilage wear, and joint health — and what the evidence shows about preserving strength, flexibility, and independence.

Details how muscle mass, fascia, tendons, and ligaments change with age and why preserving strength and connective tissue integrity is foundational to healthy aging.

Examines how skin and nails change with age, what those changes signal about broader health, and which strategies are supported by dermatology and longevity science.

Grip strength and gait speed are among the strongest predictors of healthy lifespan. This guide covers how hands and feet age and what keeps them capable.

Explores nerve conduction, sensory decline, and reflex changes with age — and the evidence-based strategies that preserve coordination and responsiveness.

Examines how blood composition, clotting tendency, and vascular flow shift over time, and which markers genuinely matter for longevity.

A clear look at endocrine decline, receptor sensitivity, and cell signalling — plus what hormone science supports and what it doesn't.

Covers immunosenescence, chronic low-grade inflammation, and the habits and interventions that keep immune defence responsive.

Collagen, elastin, and the matrix between cells shape how tissues age. This guide explains the biology and what actually influences it.

How mitochondrial function and metabolic flexibility drive energy, endurance, and the pace of biological aging — and what improves them.

Absorption, metabolism, and clearance all change with age. This guide covers polypharmacy risks and how to think clearly about medication.