Hey! I'd love to hear your thoughts, send me a voice note.

Someone cramps up on the pitch and the advice is always the same: eat a banana, you're low on potassium. In this episode, I put that advice to the test, along with two more banana myths that fill fitness feeds.

Myth 1: bananas fix cramps. A small crossover trial found that eating bananas after exercise raised blood potassium only marginally, within normal values, and not fast enough to stop a cramp. Exercise cramps look far more neuromuscular than nutritional.

Myth 2: "it's not about the carbs." When 14 trained cyclists rode 75 km on either bananas or a 6% carbohydrate drink, blood glucose and performance didn't differ. The banana works because it's excellent fuel. (The study was funded by Dole — worth knowing.)

Myth 3: banana tryptophan makes exercise feel easier. A banana has about 10 mg of tryptophan, a tiny fraction of the doses used in research, and the central fatigue hypothesis suggests more brain serotonin may make prolonged exercise harder, not easier.

In this episode:

- What's actually in a banana: potassium, B6, carbohydrate, fibre

- How nerves and muscles really fire: sodium, potassium and calcium

- Food vs pill: is banana potassium better absorbed? (No.)

- Who genuinely runs low on potassium

- The dopamine twist in the cyclist study

- Does B6 "activate" protein? What it really does

- Green vs ripe: resistant starch and glycaemic index

- The fridge myth: chilling injury explained

- Three evidence-based steps for your next workout

The takeaway: a banana is brilliant fuel. It isn't medicine.

Sources discussed:

- Miller KC (2012). Plasma potassium concentration and content changes after banana ingestion in exercised men. Journal of Athletic Training.

- Nieman DC et al. (2012). Bananas as an energy source during exercise: a metabolomics approach. PLoS ONE.

- Macdonald-Clarke CJ et al. (2016). Bioavailability of potassium from potatoes and potassium gluconate. American Journal of Clinical Nutrition.

- Segura R, Ventura JL (1988). Effect of L-tryptophan supplementation on exercise performance. International Journal of Sports Medicine.

- NIH Office of Dietary Supplements: Potassium and Vitamin B6 fact sheets.

Chapters:

00:00 Why Everyone Hands You a Banana

01:36 What's Actually in a Banana

03:10 Myth 1: Bananas Fix Cramps

05:29 How Nerves and Muscles Really Fire

08:09 Food vs Pill: Potassium Absorption

10:46 Who Really Runs Low on Potassium

11:38 Myth 2: It's Not About the Carbs

15:49 The Dopamine Twist

19:00 Myth 3: Tryptophan and Serotonin

24:09 Does B6 Activate Protein?

28:51 Green vs Ripe: The Chemistry of Ripeness

33:12 The Fridge Myth

35:39 Three Evidence-Based Steps

36:53 Food Is Fuel, Not Medicine

Host: Cagdas INAL

Food Code Matrix: the science behind what you really eat.

This episode is educational and not medical advice. If you have frequent cramps, speak to a qualified health professional.

Hey! I'd love to hear your thoughts, send me a voice note.

Two squares of 85% after dinner and a little voice saying "this is basically medicine". In Part 2, I pull that voice apart.

We go past the "what" and into the "why": how epicatechin works on the lining of your blood vessels, why the memory research keeps shifting, and why so many headlines get the actual findings wrong.

In this episode:

- The nitric oxide mechanism, and why a wider blood vessel doesn't automatically mean a sharper brain

- Inside COSMOS: the 2x2 design, the cocoa result that flatlined, the multivitamin twist, and the funding caveats worth knowing

- The 85% vs 70% chocolate study: mood, gut bacteria and the gut-brain axis (promising, but only 48 people over three weeks)

- Why "cocoa processed with alkali" on the label changes everything

- What the "chocolate buzz" really is: caffeine and theobromine

- Heavy metals without the panic: portion size and brand rotation

We finish with a harder question: why do we feel we have to medicalise every pleasure? Sometimes a treat is just a treat.

Sources discussed:

- Baker LD et al. (2023). Effects of cocoa extract and a multivitamin on cognitive function: a randomised clinical trial (COSMOS-Mind). Alzheimer's & Dementia.

- Shin JH et al. (2022). Consumption of 85% cocoa dark chocolate improves mood in association with gut microbial changes in healthy adults: a randomised controlled trial. Journal of Nutritional Biochemistry.

- Miller KB et al. (2008). Impact of alkalization on the antioxidant and flavanol content of commercial cocoa powders. Journal of Agricultural and Food Chemistry.

- Consumer Reports (December 2022). Lead and cadmium testing of 28 dark chocolate bars.

Missed Part 1? Start there for the basics and the heavy metal findings.

Next episode: green tea. Can its flavanols do what cocoa couldn't?

Host: Cagdas INAL

Food Code Matrix: the science behind what you really eat.

This episode is educational and not medical advice.

Hey! I'd love to hear your thoughts, send me a voice note.

We've quietly agreed that dark chocolate is the one sweet that counts as medicine. In this episode, I put that idea on trial.

We start at the molecular level: how cacao flavanols like epicatechin are thought to trigger nitric oxide, relax blood vessels and push more blood to the brain. Then we test that story against COSMOS-Mind, a three-year trial where thousands of older adults took cocoa extract or a placebo. The result wasn't what the marketing promised, and a basic multivitamin quietly did better.

Then the part most biohackers skip: how Dutch processing, invented in 1828, strips out most of the flavanols, and what Consumer Reports found when it tested dark chocolate bars for lead and cadmium.

In this episode:

- The flavanol and nitric oxide theory behind "chocolate for your brain"

- Why most commercial bars have had the "medicine" processed out

- COSMOS-Mind: cocoa extract vs multivitamin over three years

- Lead and cadmium in dark chocolate: where they come from and why they matter

- A practical guide for the chocolate aisle: treat it as a treat, pick tested brands, keep portions small

The takeaway: dark chocolate can be a lovely occasional joy. It just isn't a brain supplement.

Sources discussed:

- Baker LD et al. (2023). Effects of cocoa extract and a multivitamin on cognitive function: a randomised clinical trial (COSMOS-Mind). Alzheimer's & Dementia.

- Miller KB et al. (2008). Impact of alkalization on the antioxidant and flavanol content of commercial cocoa powders. Journal of Agricultural and Food Chemistry.

- Consumer Reports (December 2022). Lead and cadmium testing of 28 dark chocolate bars.

Part 2 goes deeper: the gut-brain link, the mood studies and how to read a chocolate label properly.

Host: Cagdas INAL

Food Code Matrix: the science behind what you really eat.

This episode is educational and not medical advice.