Retinol and Copper: How Vitamin A Loads Copper Into Ceruloplasmin

How retinol and copper are connected

Retinol is preformed vitamin A, the form the body can use directly. In Minerals Revolution, Ethan Fialkow calls it essential for keeping copper in balance and for making copper bioavailable. The key step is ceruloplasmin. The book describes retinol as vital for loading copper into ceruloplasmin, the copper protein that carries most of the copper in blood and manages iron through its ferroxidase activity.

Copper that is not loaded into ceruloplasmin cannot do that iron work. So a person can take in copper and still come up short on function if retinol is low. The book also ties retinol to iron recycling for proper hemoglobin formation, and notes that bone marrow, where red blood cells are made, needs a lot of it. Our ceruloplasmin page covers the protein in detail.

Vitamin A and copper: retinol comes only from animal foods

Vitamin A arrives in two families. Retinoids, including retinol, come from animal foods. Carotenoids, including beta-carotene, come from plants. The book lists retinol sources as liver, oily fish, cheese, butter, heavy cream, and egg yolks.

The book's account of the modern mineral crisis names retinol as a casualty of the low-fat era. As butter, cream, and organ meats fell out of favor, the main dietary sources of retinol went with them. Processed foods lost it too.

Beta-carotene conversion

The body can convert beta-carotene into vitamin A. That route is indirect, and conversion varies from person to person, which is why the book focuses on retinol itself. Carotenoids such as lycopene, lutein, and zeaxanthin still have their own antioxidant value. They just are not a reliable substitute for the preformed form when the goal is supporting ceruloplasmin.

Why the book says vitamin D supplements compete with retinol

This is one of the book's sharper positions. It states that supplemental vitamin D reduces retinol absorption, and that higher D intake leaves less retinol available. It adds that active vitamin D must pair with a nuclear receptor called RXR, which requires retinol to work. Taking large amounts of D while retinol is low, in this view, works against both nutrients and against copper.

That is why vitamin D3 supplements and D-fortified foods appear on the book's stop list (see what to stop taking), and why daily sun is one of the protocol's starts. The book also tracks retinol against vitamin D when reviewing lab results.

Cod liver oil as the book's retinol source

In the mineral optimization protocol, retinol comes in as the ninth start, through cod liver oil. The book calls it one of the best natural sources and says most people are deficient in retinol when they begin. It is taken with a meal, and the book suggests mornings with breakfast.

The book frames retinol as a phase. It recommends supplementing only when there are signs of deficiency and for a limited stretch, then tapering or stopping as levels rise. That fits the protocol's broader rule that needs fall as the body resaturates. Taurine, a later start, supports bile production, which the book links to retinol absorption.

The target amounts and how to build toward them are in the book.

Vitamin A toxicity: the context

Retinol is fat-soluble and stored, mostly in the liver. Oral absorption is high, with the book citing 70 to 90% of preformed vitamin A being absorbed. That storage is why too much over time can cause problems.

• The book notes that overdosing is rarely seen and happens when liver stores are already saturated and large intake continues.
• Vitamin A from ordinary foods is considered safe. The risk comes mainly from supplements taken above recommended levels.
• Chronic toxicity develops over months of high daily intake and is a bigger concern than a single large exposure.
• Some animal livers, such as polar bear and seal, are extremely concentrated and can be toxic.
• Children are more sensitive to vitamin A than adults.

The StatPearls review on vitamin A toxicity lays out the clinical picture and thresholds. This is the reason the book keeps retinol time-limited and tied to signs of need.

Pairing retinol with copper

Since retinol loads copper into ceruloplasmin, the two belong in the same plan. The book introduces copper slowly, with food, and increases it over time. Our 3g copper bisglycinate powder suits that approach: the jar holds about 780mg of copper (the powder is roughly 26% copper), and the scoop's small side measures about 2.6 to 3.9mg of copper while the large side measures about 6.5 to 7.8mg. For how copper interacts with its other partners, read zinc and copper, and see Ethan's Copper 101 for background.