The Outlive Protocol: How to Test What Peter Attia Recommends in London

Peter Attia's Outlive is the most clinically serious popular book on longevity medicine published in the past decade. It is not a wellness book. It is a detailed argument, grounded in clinical evidence and medical practice, for how intelligent people should think about their health decades before disease becomes symptomatic, and what they should measure, monitor, and act on to extend both lifespan and healthspan.

For the men who read it, which includes most of our clients at Miller Health, the immediate question is practical. How do I actually access the testing Attia recommends? Where in London can I get an ApoB, aDEXA scan, a fasting insulin test, and a proper hormonal panel reviewed by someone who knows what they are looking at? This article maps the Outlive protocol to what is available at Miller Health and explains what each component reveals clinically.

The Four Horsemen Framework: Why Early Testing Matters

Attia structures his longevity argument around four chronic diseases he calls the horsemen: cardiovascular disease, cancer, neurodegenerative disease, and metabolic dysfunction including type 2 diabetes. His central thesis is that all four have extended preclinical phases, often decades long, during which the biological processes driving them are detectable and partially reversible. Medicine 3.0, his term for the proactive approach, engages during this window rather than waiting for symptomatic disease.

The consequence for men over 40 who take this seriously is that the diagnostic work needs to happen now. Not when symptoms appear. Not when a GP orders bloods after something shows up on a routine check. The intervention window is open and it will not stay open indefinitely.

Peter Attia Outlive London: Mapping the Protocol to the Miller Health Assessment

Cardiovascular Risk: Beyond LDL to ApoB and Lp(a)

Attia is categorical on this point: LDL cholesterol is not the right cardiovascular risk marker. The number of atherogenic particles, specifically apolipoprotein B-containing particles, determines cardiovascular risk more accurately than LDL concentration. He advocates for ApoB as the primary marker and for lipoprotein(a) to be tested once in every adult, since it is genetically determined and unchanged by diet or standard lipid medications.

Both ApoB and Lp(a) are included in the Miller Health Explore advanced blood panel. For a man whose LDL appears acceptable but whose ApoB is elevated, theExplore assessment reveals a cardiovascular risk profile that a standard panel would miss entirely.

Metabolic Health: Insulin Resistance and Glucose Metabolism

Attia is equally direct about insulin resistance. He considers it foundational to three of his four horsemen: it contributes directly to cardiovascular disease through its effects on the arterial wall, it elevates cancer risk through multiple mechanisms including elevated insulin-like growth factor, and it is the upstream driver of type 2 diabetes. Detecting it early requires testing fasting insulin, which rises years before HbA1c, and HOMA-IR, which quantifies insulin resistance as a calculated index.

Both are included in the Miller Health advanced blood panel. The combination of fasting insulin and HOMA-IR with the DEXA-measured visceral fat area gives the most complete picture of metabolic risk status available without hospitalisation-grade imaging.

Body Composition: DEXA Scan and Visceral Fat

Attia consistently emphasises body composition over body weight and advocates for DEXA scanning as the appropriate measurement tool. He specifically references visceral fat as the metabolically dangerous fraction, lean muscle mass as the critical protective tissue, and bone density as the underappreciated longevity marker.

The DEXA scan included in the Miller Health Explore assessment provides all three measurements in a single fifteen-minute session. The resulting body composition report gives you the T-score, Z-score, lean mass by segment, total and regional fat distribution, and visceral adipose tissue area that Attia's clinical framework references.

VO2 Max and Cardiorespiratory Fitness

Attia describes cardiorespiratory fitness, measured as VO2 max, as one of the strongest predictors of all-cause mortality and longevity available. He references research showing that moving from the bottom quartile to the top quartile of VO2 max reduces all-cause mortality risk by more than any medication currently available.

VO2 max testing is not part of the standard Miller Health Explore assessment, which focuses on metabolic, hormonal, and body composition diagnostics. For men whose clinical picture points to cardiorespiratory fitness as a priority, we can discuss how to access appropriate VO2 max testing in London as part of a complete longevity protocol. This is noted honestly: the Explore assessment is comprehensive but it does not cover every element of the Outlive framework.

Hormonal Health: Testosterone, SHBG, and the Male Endocrine Picture

Attia addresses testosterone and male hormonal health as significant contributors to metabolic function, muscle mass preservation, and cognitive vitality. His framework includes comprehensive hormonal assessment as part of a longevity evaluation.

The Miller Health hormonal panel covers free and total testosterone, sex hormone-binding globulin, oestradiol, LH, FSH, and thyroid function. Viewed alongside the body composition data from the DEXA scan, this panel contextualises your hormonal status within your metabolic environment in the way Attia's clinical approach demands.

Inflammation and Biological Age: High-Sensitivity CRP and Homocysteine

Attia covers systemic inflammation extensively, both as a cardiovascular risk factor and as a contributor to neurodegenerative decline. High-sensitivity CRP is his primary inflammatory marker. Homocysteine, which damages vascular endothelium and is associated with Alzheimer's risk, is a marker he includes in comprehensive assessments.

Both are included in the Miller Health Explore blood panel. Elevated homocysteine is addressed with targeted B vitamin supplementation once identified and is frequently found in men with low dietary intake of folate and B12, which is common in high-stress, low-cooking-frequency lifestyles.

The Longevity Doctor London Question: Credentials and Clinical Rigour

Attia is a physician. His clinical approach is grounded in his medical training and his subspecialty expertise in longevity medicine. Men reading Outlive and seeking to apply the framework in London need to be clear about what they are looking for and who is qualified to provide it.

At Miller Health, we are not physicians and we are not longevity doctors. We are HCPC-registered dietitians who specialise in the metabolic, nutritional, and body composition dimensions of the Outlive framework. We can provide the diagnostic assessment, the clinical interpretation, and the nutritional and lifestyle intervention that addresses the majority of what Attia's framework requires.

For the dimensions that fall outside our scope, including pharmacological interventions such as GLP-1 medications or testosterone replacement therapy where clinically indicated, we work within a referral network and can direct appropriately. This transparency is part of the clinical standard we hold ourselves to.

What the Explore Assessment Covers Against the Outlive Checklist

DEXA body composition scan including visceral fat, lean mass, and bone density. Advanced blood panel including ApoB, Lp(a), fasting insulin, HOMA-IR, high-sensitivity CRP, homocysteine, and full hormonal assessment. Resting metabolic rate through indirect calorimetry. Clinical review of all results by an HCPC-registered dietitian with specific expertise in male metabolic health.

This covers the metabolic, cardiovascular risk, hormonal, body composition, and inflammatory domains of the Outlive diagnostic framework. It does not cover VO2 max testing, which requires separate cardiorespiratory assessment. For the men who engage with us, the Explore assessment is the right starting point for translating the Outlive framework into actionable clinical data.

From Assessment to Action: The Engage Programme

Reading Outlive and getting the diagnostic picture are steps one and two. The third step, which is where most men stall, is implementing a sustainable clinical programme based on the results.

The Miller HealthEngage programme provides twelve weeks of structured, data-led support at £450 per month. Four sessions per month with an HCPC-registered male dietitian who builds and iterates your nutritional and lifestyle protocol from your specific Explore results. Not a generic longevity protocol. Your longevity protocol.

Book Your Outlive Assessment in London

The Explore assessment at Miller Health is the most direct route to applying the Outlive diagnostic framework available in London. It is priced at £1,950 and available at 25 Harley Street.

If you have read the book and you are ready to find out where you actually stand,