Liver
For vitamin A intake and bioavailability
The experts we follow agree on this.
Liver is a nutrient-dense food that supports vitamin A, B12, and copper needs with modest weekly servings.
Who is behind it
Voices including a nutritional sciences PhD, a licensed acupuncturist and clinician-educator and a GP with a Master of Public Health.
How strong the research is
Well studied in published research, as well as in practice.
In their words
“For preventing food intolerances, we want to raise our children from an early age eating liver once or twice a week and eating the yolks of eggs with an average egg consumption of one, two, maybe even three a day”
a nutritional sciences PhD
Eating 4 to 6 ounces of freshly cooked liver once a week meets your needs for vitamin A, B12, and copper for the entire week.
Eating liver provides preformed retinol, the active form of vitamin A important for skin health and acne reduction.
Copper activates the enzyme that moves iron around the body, so low copper can cause low iron.
Liver is the richest source of vitamin B6, which is linked to doubling the odds of conception, raising pregnancy chances by 40%, and cutting miscarriage risk by half.
Liver provides retinol, copper, choline and bioavailable iron, nutrients essential for reproduction.
Retinol and B12 support thyroid health during the postpartum window
a certified naturopathsponsoredLiver and oysters provide nutrients that support reproductive signaling.
Liver is rich in essential minerals like copper, vitamin A and zinc and acts as a complete multivitamin.
Where they disagree
Both sides
For
Eating 4 to 6 ounces of freshly cooked liver once a week meets your needs for vitamin A, B12, and copper for the entire week.
a nutritional sciences PhDAgainst
To avoid risk of hypervitaminosis A while still gaining benefits from liver's fat soluble vitamins.
a GP with a Master of Public HealthMost of the minds come down in favour, and the dissent is worth knowing.
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Well studied in published research, as well as in practice.
Some statements come from sponsored segments or people speaking about their own products. They are marked where they appear and count for less. Last refreshed 23 September 2026.
The research beneath it
- Social Bonds Retain Oxytocin-Mediated Brain-Liver Axis to Retard Atherosclerosis.Circulation research, 2025
- The relationship between vitamin C status, the gut-liver axis, and metabolic syndrome.Redox biology, 2019
- A High Protein Diet Has No Harmful Effects: A One-Year Crossover Study in Resistance-Trained Males.Journal of nutrition and metabolism, 2016
- Nicotinamide riboside is uniquely and orally bioavailable in mice and humans.Nature communications, 2016
- Dietary fiber prevents obesity-related liver lipotoxicity by modulating sterol-regulatory element binding protein pathway in C57BL/6J mice fed a high-fat/cholesterol diet.Scientific reports, 2015
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