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A learning a day, since May 12 2008, by Rohan.
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Indispensable meetings

2026-04-13 19:15:00

Meetings are indispensable when you don’t want to do anything.”| John Kenneth Galbraith (quoted in Poor Charlie’s Almanack)

I thought this’d be a good one as we start the week and contemplate the meetings we want to organize or attend. :-)

No diet wins

2026-04-12 19:02:00

After 40 years of running experiments on the impact of diets on nutrition and health, Stanford University’s Christopher Gardner came to a simple conclusion – diet wars are a distraction.

I loved this distillation of the five lessons he shared –

(1) No single diet wins across the board. Low-carb, low-fat, vegan, and Mediterranean diets all produce similar average outcomes when matched for quality.

(2) Individual variation in response to diet is enormous – and mostly unexplained by genetics, insulin status, or any other single factor researchers have identified.

(3) Added sugar and refined grains are the dietary factors with the clearest, most consistent evidence for harm – and the ones most worth reducing regardless of which diet pattern you follow.

(4) The best diet for you is the one you can sustain. But that doesn’t mean the standard American diet – it means finding the highest-quality version of an eating pattern you can actually stick to long-term.

(5) There is more scientific consensus around the fundamentals of healthy eating than headlines suggest. Eat whole foods, plenty of vegetables, and legumes. Avoid added sugar and refined grains. Nearly every serious dietary framework agrees on this.

Apo(B), Lp(a), and CHIP

2026-04-11 19:06:00

Dr Eric Topol wrote about a big milestone recently – Cardiology professional organizations have finally recognized that Apo(B) and Lp(a) should be part of the lipid panel.

After reading Dr Attia’s Outlive, I’d asked for these as part of my panel. But I’d been denied – so here’s hoping that changes. In his words – “Think of how many people would have been identified at high-risk for atherosclerosis and cardiovascular events who were missed all this time because the guidelines didn’t keep up with the body of knowledge.

Dr Topol’s post goes on to advocate for the CHIP test as part of the lipid panel.

CHIP, which stands for clonal hematopoiesis of indeterminate potential, refers to presence of myeloid blood cells with a driver gene mutation (with a frequency of ≥ 2%) without any clinical criteria of a blood cancer. It turns out CHIP is a major biomarker, not just for blood cancer (an 11-fold risk of a blood malignancy, or absolute 0.5% risk per year), but also for heart disease, blood clot events such as stroke and pulmonary embolism, and many other chronic illnesses 

He makes the case with a simple chart that shows that the risk of heart rate with CHIP present goes up 1.8x.

You can also see the trend clearly here.

I’m hoping we’ll continue to see more testing here and will hopefully see it in the guidelines sooner than 8 years later.

Sid on Cancer

2026-04-10 19:18:00

Sid Sijbrandij (pronounced “see-brandy”), the co-founder of GitLab, was diagnosed with bone cancer and found himself running out of treatment options when the cancer returned in 2024.

After doctors essentially told him “good luck,” he decided to take ownership. What followed was impressive – He assembled a team, built a 1,000+ page health document modeled after the GitLab Handbook, and pursued what he calls “maximal diagnostics” – doing every test available, as often as possible.

Armed with that data, he identified experimental therapies, navigated the FDA for compassionate use access, and flew to Germany for a cutting-edge radioligand therapy that targeted his specific tumor markers. His cancer is now in remission.

He has documented his entire journey here (this story has a lot of the details too).

While Sid is undoubtedly fortunate to have incredible resources as someone whose net worth is in the hundreds of millions of dollars (or more), this is a glimpse of where cancer care is heading – personalized diagnostics, custom therapies, AI-driven drug discovery. He also highlights the aspects of the system that are broken – e.g., getting his own tissue samples and genomic data.

And, as he called out, the basics are not prohibitively expensive.

We have more agency than we think – especially with the tools available to us today.

Foolish and stupid

2026-04-09 19:02:00

“If you want to improve, be content to be thought foolish and stupid.” | Epictetus

Epictetus had another note that made the same point – “It is impossible to being to learn that which one thinks one already knows.”

It is easy to say “I want to learn.” It is much harder to be committed to being okay with being thought as foolish and stupid. That is a lot of discomfort to endure.

It is why learning is hard.

Wrong with the majority

2026-04-08 19:52:00

“In any great organization it is far, far safer to be wrong with the majority than to be right alone.” | John Kenneth Galbraith (quoted in Poor Charlie’s Almanack)

I discovered a collection of pithy and wise quotes from economist John Kenneth Galbraight.

This was one of those – so true.