The Reserve Guide

What the numbers mean, what the labels hide, and how long any of it takes.

A wooden kitchen table by a window with a plate of toast and a boiled egg, a glass of water and two capsules in a small dishMECHANISMWhy Iron Is Hard on a Stomach, and What Changes It Ferrous sulfate roughly doubles the odds of stomach trouble against placebo. What the same trials show is that the dose is not ... A breakfast table with coffee, tea, milk, cheese, bran and orange juice in morning lightMECHANISMWhat Competes With Iron at Absorption Coffee does not cancel iron. It competes with it, in the same stretch of intestine, over the same few minutes. The subject is t... A small dish of pale powder, a glass of water, an egg and a few almonds on a linen clothMECHANISMWhat L-Lysine Is Doing in an Iron Formula Lysine reads like it wandered in from another aisle. The honest answer to why it is there ends somewhere less certain than most... A kitchen still life of lentils, pumpkin seeds, spinach, eggs, thin-sliced red meat and a halved lemonMECHANISMPlant Iron and Animal Iron: Why the Form Matters More Than the Amount Two foods can list the same milligrams of iron and deliver very different amounts. A label counts what is present, not what cro... Two glass petri dishes side by side, one holding coarse rust granules, the other smooth pale beadsMECHANISMChelated Iron and Iron Salts: Why Tolerance Differs Two bottles both say iron. One says ferrous sulfate, the other ferrous bisglycinate. Here is what that word changes inside the ... A glass carafe of milk, a bowl of cream and pale capsules on a wooden kitchen tableMECHANISMWhat Lactoferrin Actually Does With Iron Lactoferrin is a protein that binds iron. What it does, why it costs so much, and the difference between an ingredient named an... A glass of water, two capsules in a small dish and a terracotta jug on a sunlit kitchen counterMECHANISMFerritin and Iron Are Not the Same Test One line on a lab report counts the iron that is moving. The other counts the iron that is kept. They are not answering the sam...

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