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The Journal

Field Notes

Nutrition insights, sourcing stories, and the science behind whole-food supplements.

Retinol vs Beta-Carotene: Why the Form of Vitamin A Matters More Than the Amount

Retinol vs Beta-Carotene: Why the Form of Vitamin A Matters More Than the Amount

Up to 45% of people carry a gene variant that significantly reduces their ability to convert beta-carotene ...

Apr 02, 2026 · Read →
Beef Spleen: The Organ Meat With Five Times More Iron Than Beef Liver

Beef Spleen: The Organ Meat With Five Times More Iron Than Beef Liver

Beef spleen contains around 31 milligrams of iron per 100 grams of raw tissue — roughly five times the iron...

Apr 02, 2026 · Read →
Beef Kidney: The Overlooked Organ Meat Packed with Selenium, B12, and DAO

Beef Kidney: The Overlooked Organ Meat Packed with Selenium, B12, and DAO

Of every beef organ, kidney delivers more selenium per gram than almost anything else you can eat. A single...

Mar 26, 2026 · Read →
Beef Heart: The CoQ10 Powerhouse Hidden in Plain Sight

Beef Heart: The CoQ10 Powerhouse Hidden in Plain Sight

Beef heart is one of those foods that nutritionists quietly admire and the general public largely ignores. ...

Mar 23, 2026 · Read →
Why NZ Grass-Fed Beef Liver Is Nature’s Most Nutrient-Dense Food

Why NZ Grass-Fed Beef Liver Is Nature’s Most Nutrient-Dense Food

If you're looking for a single food that delivers more nutrition per bite than almost anything else on the ...

Mar 21, 2026 · Read →
Beef Liver: The Original Superfood (And Why You Need It)
B12

Beef Liver: The Original Superfood (And Why You Need It)

Before multivitamins existed, before protein powders lined supermarket shelves, before anyone had heard of ...

Mar 19, 2026 · Read →
What Is an Animal-Based Diet and Is It Right for You?
animal-based diet

What Is an Animal-Based Diet and Is It Right for You?

I’ve spent years working closely with grass-fed cattle farming in New Zealand and the UK — visiting farms, ...

Mar 19, 2026 · Read →
How to Choose a Beef Organ Supplement: What to Look For (and What to Avoid)
beef organ supplement guide

How to Choose a Beef Organ Supplement: What to Look For (and What to Avoid)

The market for beef organ supplements has grown significantly in recent years, and with that growth has com...

Mar 14, 2026 · Read →
Whole Food Supplements vs. Synthetic Vitamins: Why the Source Matters
bioavailability

Whole Food Supplements vs. Synthetic Vitamins: Why the Source Matters

Walk into any supplement store and you'll find shelves of multivitamins, B-complexes, and iron tablets — ea...

Mar 14, 2026 · Read →