Evidence-Based Persuasive Science

Writing to persuade, while remaining grounded in science. This is category most heavily utilizes my professional judgement to tie the appropriate pieces together into a cohesive and convincing science-backed argument. Projects are grounded in a full review of the evidence, including the strongest counter-arguments, to ensure persuasion is responsible, transparent, and defensible.

Arguments are built from the science itself—not from exaggeration, selective omission, or marketing claims unsupported by evidence.

 

Includes:

  • Targeted review of supporting and opposing literature

  • Mechanism-driven scientific argumentation

  • Translation of complex data into compelling, accurate narratives

  • Anticipation and addressing of common scientific objections

  • Writing calibrated to audience knowledge and intent

 

Typical formats:

  • Thought-leadership articles

  • Long-form educational content

  • Science-backed marketing or investor materials

  • Narrative explanations of product or intervention rationale

 

Ideal for:

  • Health and wellness brands

  • Longevity and prevention-focused companies

  • Health-tech startups and founders

  • Organizations that need to persuade without compromising scientific integrity

Jenna Greenfield MD, Medical science writing, rigorously accurate, yet clear and engaging writing on medical and health science topics.

Writing Samples

This category includes a wide range of tones from marketing copy with heavily persuasive language, to a formal scientific tone with a discreet nudge toward a particular conclusion.

Following are excerpts demonstrating different degrees of persuasive tone.

Heat and Neurodegenerative Disorders
persuasive science writing Jenna Greenfield MD persuasive science writing Jenna Greenfield MD

Heat and Neurodegenerative Disorders

Imagine reaching your 85th birthday and still having your mind intact, your lifetime of memories, your ability to solve problems with ease, and your capacity to communicate effectively still sharp. Your life is a cohesive story that you can reflect on and find meaning in.   For about one-third of those who reach this milestone, this is not the case1.  About 7.2 million people over age 65, or about 11% of the population, are living with Alzheimer’s Disease.  After age 65, the risk of developing the disease starts doubling every five years.  Alzheimer's Disease (AD) is the most common form of dementia and the sixth leading cause of death in the United States.2

Sauna Studies

If you’ve been following along since the Kuopio Ischemic Heart Disease Risk Factor Study (KIHD), the decades-long Finnish project that showed sauna use slashes cardiovascular risk—you’ll know the Finns are onto something. But the most surprising results weren’t about the heart. They were about the brain.

The frequent sauna users, using their sauna four or more times a week, were 66% less likely to be diagnosed with dementia.  That’s not just “clinically significant;” that number is almost hard to swallow. So let’s look closer.

Why would heat protect the brain?

What is behind this potential risk reduction? I’ll give you a hint: it’s my favorite protein again. Heat shock proteins.  It turns out, the culprit behind neurodegenerative diseases is the build up of toxic protein aggregates. The very thing heat shock proteins are designed to combat. 

Neurodegenerative Diseases

Dementia isn't a single disease, but rather a term that describes a progressive decline in cognitive function that impacts daily life. Alzheimer's Disease accounts for 60-80% of all dementia cases. Parkinson's Disease (PD) is a neurodegenerative disease that primarily attacks the brain's movement centers.  And less common but faster progressing, Amyotrophic Lateral Sclerosis (ALS) aggressively destroys motor neurons, often proving fatal within just five years of diagnosis.

As with other degenerative disorders, these processes mirror the aging process. Oxidative stress, and reactive oxygen species (ROS) is the "normal wear and tear" on our cells. We have mechanisms to repair this damage, and for many years its not a problem. But over a lifetime the damage slowly accumulates, and eventually hits a critical point where the cell’s defenses become overwhelmed. In the neurodegenerative diseases, we are not talking about vague or theoretical “cell damage.”  We know the exact proteins that cause the problems.  In Alzheimer’s, beta-amyloid and tau form plaques and tangles. In Parkinson’s, it’s alpha-synuclein fibrils. In ALS, mis-folded SOD1 piles up. The result? Neurons get clogged, cellular processes grind to a halt, and the brain malfunctions.

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Sauna and Cardiovascular Mortality: The Kuopio Ischemic Heart Disease Risk Factor Study
persuasive science writing Jenna Greenfield MD persuasive science writing Jenna Greenfield MD

Sauna and Cardiovascular Mortality: The Kuopio Ischemic Heart Disease Risk Factor Study

The relationship between regular sauna use and cardiovascular health was systematically evaluated using data from the Kuopio Ischemic Heart Disease Risk Factor Study (KIHD), a prospective, population-based cohort study conducted in eastern Finland. Initiated in 1984, this ongoing epidemiological study has followed nearly 3,000 middle-aged Finnish men and women over multiple decades to identify risk factors for cardiovascular disease and other age-related conditions.¹

Finland is particularly well suited to this study design due to comprehensive national health registers and the use of a personal identification code assigned to citizens at birth. It is also uniquely suited to studying long-term sauna use, as saunas are an integral part of Finnish culture. There are nearly as many saunas in Finland as there are people—approximately 3.3 million saunas for a population of 5.5 million.

Study Design and Population

The KIHD study enrolled participants aged 42–60 years at baseline, collecting comprehensive data on lifestyle factors, health behaviors, and physiological parameters. Sauna use frequency and duration were assessed at baseline. Participants were stratified into three groups based on frequency: infrequent users (≤1 session per week), moderate users (2–3 sessions per week), and frequent users (≥4 sessions per week). Participants were followed for over 20 years, allowing for long-term outcome assessment.

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