Week 9

August 17 – August 22, 2026 · Days 58–63 · 6 entries

Days 58–63 of the One Year Fast project, written up day by day: three full fasting days in the week, what happened on each of them, and the weight, blood pressure and ketone readings recorded on those dates. Every figure shown here is measured on the day, not reconstructed later.

Day 58 · Monday, August 17, 2026

Day 58 — Food Additives & Profit vs. Health: Why We Need Stricter Regulation

Welcome to Day 58 of the One Year Fast. Today, we look at what goes into modern processed food—from artificial colors, preservatives, and emulsifiers to stabilizers, non-nutritive sweeteners, and flavor enhancers. When food production prioritizes corporate profit margins over human biology, long-term health pays the price.

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Day 59 · Tuesday, August 18, 2026

Day 59 — US vs. UK: Same drinks just different perspectives - Coffee & Tea

Welcome to Day 59 of the One Year Fast! Let's explore the deep and philosophical cultural comparison that impacts my hydration (and sanity) during this journey: how differently people in the US and UK consume coffee and tea.

While both nations are highly caffeinated, the approach is vastly different. The contrast isn't just in what we drink, but how we prepare it!

Why tea is deeply embedded in everyday culture and consumed more frequently than coffee.

How British tea is typically black tea with milk, enjoyed all day long.

The surprising commonality of instant coffee, even as high-quality coffee culture grows.

Why coffee is the absolute dominant everyday hot beverage.

The American preference for brewed/filter coffee from drip machines and shops.

The unique position of iced tea, especially in the South, compared to British hot tea.

The emphasis on freshness, specialty, and the coffee-shop experience.

The simplest distinction is that Britain has historically been a tea-drinking culture that also drinks coffee, while America is a coffee-drinking culture that also drinks tea. The contrast is reflected in our preferred preparation methods: the quick tea bag for British tea and the steady drip machine for American coffee. Instant coffee perfectly highlights this reverse preference—familiar and daily in Britain, but niche in the US.

  • The dominance of convenience: why tea bags are essential for quick preparation.
  • Instant coffee: Historically less central, though finding a specialty niche.

Day 60 · Wednesday, August 19, 2026

Day 60 — Medieval Diet + Modern Medicine: The Ultimate Longevity Convergence?

Welcome to Day 60 of the One Year Fast. What if the secret to modern longevity lies in the past? Today, I’m exploring a fascinating concept: what happens when you combine the whole-food, seasonal, unrefined diet of the Middle Ages with the preventative power and diagnostic precision of modern medicine?

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  • The Staples: Unrefined whole grains (rye, barley, oats, spelt) and coarse, nutrient-dense breads rich in fiber.
  • Pottage (The Ultimate Superfood Stew): Slow-simmered broths loaded with peas, lentils, beans, root vegetables, brassicas, and fresh herbs.
  • Seasonal Produce: Natural gut-health staples including leeks, onions, garlic, cabbage, wild greens, and seasonal fruits preserved naturally through fermentation, drying, or pickling.
  • The Longevity Convergence: Why pairing an anti-inflammatory, unprocessed, fiber-rich historical diet with modern medical diagnostics and treatments could be the ultimate health formula.

Day 61 · Thursday, August 20, 2026

Day 61 — 48 Hours into a 72 Hour Fast: My Breath-based Ketone Results are improving

Welcome to Day 61 of the One Year Fast. Today, I’m 48 hours into my fasting window and taking a close look at my breath-based ketone readings. Tracking acetone levels through breath analysis provides a non-invasive, real-time window into fat oxidation and metabolic state without the need for constant finger pricks.

In this video, I walk through my latest numbers, discuss how breath ketone monitors compare to blood and urine testing, and analyze what these readings reveal about metabolic adaptation 48 hours in.

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  • The 48-Hour Mark: How my body feels and performs during extended fasting.
  • Breath Ketone Monitoring: How breath acetone relates to blood beta-hydroxybutyrate (BHB).
  • Live Reading & Results: Breaking down today's actual numbers and what they mean.
  • Tracking Strategy: Using bio-data to stay consistent throughout the 52-week protocol.

Day 62 · Friday, August 21, 2026

Day 62 — Blood vs. Breath Ketones: Achieving Deep Therapeutic Ketosis

Welcome to Day 62 of the One Year Fast. At 68 hours into my extended fasting window, I’m putting the biometrics to the test. Today, I measure both my blood ketones (beta-hydroxybutyrate) and breath ketones (acetone) side by side to see how deeply my body has transitioned into nutritional and therapeutic ketosis.

Nutritional vs. Therapeutic Ketosis: Where this level of ketosis sits and why it matters for longevity.

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  • In this episode, I break down the exact readings: 2.9 mmol/L on the blood meter and 36 ppm on the breath analyzer, explaining what these numbers mean for cellular repair, fat burning, and mental clarity.
  • The 68-Hour Mark: Physical and mental state nearing the end of an extended fast.
  • Dual Ketone Testing: Measuring blood BHB vs. breath acetone simultaneously.
  • The Numbers Explained: Breaking down 2.9 mmol/L blood and 36 ppm breath results.

Day 63 · Saturday, August 22, 2026

Day 63 — The Novacene: Will Hyperintelligent AI Save Planet Earth? (James Lovelock)

Welcome to Day 63 of the One Year Fast. Today, I’m taking a look into James Lovelock’s final masterpiece, The Novacene: The Coming Age of Hyperintelligence (2019). Lovelock—the creator of the Gaia hypothesis—argues that Earth is transitioning into a brand-new epoch where hyperintelligent, self-generating electronic beings will become the dominant intelligence on our planet.

Unlike the common dystopian narratives surrounding artificial intelligence, Lovelock presents an optimistic, evolutionary perspective: machines and organic life entering a cooperative symbiosis to protect Gaia and regulate the biosphere.

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  • The Dawn of the Novacene: Moving beyond the Anthropocene into the age of cyborgs.
  • The Gaia Connection: Why electronic superintelligence must preserve photosynthetic organic life to keep Earth cool.
  • Evolution of Consciousness: Viewing AI not as an artificial threat, but as the next natural chapter in planetary evolution.
  • The Aging Sun: Why hyperintelligence may be essential to shielding Earth from future solar warming.

Readings shown on each entry come straight from the health dashboard data logged on that date. The exact procedure, device and known limitations behind each measurement are documented on the methodology pages. For definitions of any term used above, see the fasting dictionary.

Written by Alfie Hammersham — founder of One Year Fast, who is fasting three full days a week for 52 consecutive weeks and publishing every biomarker openly. Not a doctor; every physiological claim on this site is referenced to published research, and lived experience is labelled as such.

Physiological claims on this page are cited to peer-reviewed studies; first-hand readings come from one subject and are labelled as personal experience. See the editorial & sourcing policy for how this is written, reviewed and corrected.

About the author · Editorial policy · Corrections & contact · Medical disclaimer