New Zealand Grassfed Liver
Also known as: Beef liver, Grass-fed beef liver, Desiccated beef liver, Bovine Liver
Overview
Beef liver, derived from grass-fed cattle (*Bos taurus*), is a nutrient-dense organ meat utilized as a dietary supplement. It's a rich source of vitamins A, K, and B complex, along with heme iron and essential minerals, often considered a natural multivitamin. It is commonly used to support energy levels, thyroid health, blood health, skin and eye health, and overall nutritional well-being. While anecdotal evidence and some clinical studies exist, extensive research on specific benefits is limited. The available evidence consists mainly of observational studies, case series, and small-scale clinical trials, lacking large-scale randomized controlled trials (RCTs) specifically focused on beef liver supplements. Sourcing from reputable, grass-fed, and pasture-raised cattle is crucial to minimize contamination risks.
Benefits
Beef liver is rich in nutrients that may offer several health benefits. Its high heme iron content supports blood health, potentially preventing iron deficiency anemia. The vitamins and minerals contribute to increased energy levels and overall well-being. Additionally, the antioxidants and other nutrients may promote skin and eye health, as well as muscle recovery and brain function. The protein and amino acid content can help prevent sarcopenia and support muscle health. Individuals following keto, paleo, or carnivore diets may find beef liver supplements particularly beneficial due to their high nutrient density and alignment with these dietary approaches. However, the lack of specific RCTs on beef liver supplements means that effect sizes and clinical significance are not well quantified.
How it works
The nutrients in beef liver, such as vitamins A and K, B complex vitamins, and heme iron, are absorbed and utilized through various biological pathways. Heme iron, for example, is absorbed in the duodenum and proximal jejunum and then transported to the liver for storage and distribution. The antioxidants and other nutrients may interact with cellular pathways to reduce oxidative stress and support overall health. Beef liver nutrients interact with multiple body systems, including the hematopoietic system (through iron), the nervous system (through B vitamins), and the integumentary system (through vitamins A and K). The bioavailability of nutrients from beef liver is generally high due to the natural form of these nutrients.
Side effects
Beef liver supplements are generally considered safe when sourced from reputable, grass-fed, and pasture-raised cattle. However, there is a risk of contamination with heavy metals or other pollutants if not properly tested. Common side effects data is limited, but gastrointestinal upset could be a potential issue for some individuals. Uncommon side effects include allergic reactions or sensitivities to beef products. Severe allergic reactions or anaphylaxis are rare. There is no significant evidence of drug interactions, but individuals on iron supplements or other medications should consult their healthcare provider. Individuals with severe allergies to beef or those with certain medical conditions (e.g., hemochromatosis) should avoid or consult their healthcare provider before using beef liver supplements. Pregnant or breastfeeding women, as well as individuals with chronic health conditions, should consult their healthcare provider before starting any new supplement regimen.
Dosage
A typical serving size of beef liver supplements is around 3000 mg (6 capsules) per day, although the minimum effective dose is not well established in clinical trials. The optimal dosage range is generally aligned with the recommended serving size, but individual needs may vary. There is no established maximum safe dose, but excessive intake of certain nutrients (e.g., vitamin A) can lead to toxicity. It is generally advised to take supplements with meals to enhance absorption. Freeze-dried and non-defatted forms are recommended to preserve nutrient integrity. Absorption can be enhanced by taking the supplement with a meal that contains healthy fats.
FAQs
How do I choose a high-quality beef liver supplement?
Ensure the supplement is sourced from grass-fed, pasture-raised cattle and is third-party tested for purity and potency. Look for freeze-dried and non-defatted forms to preserve nutrient integrity.
Are there any safety concerns I should be aware of?
Consult a healthcare provider if you have any underlying health conditions or allergies. Be aware of potential contamination risks and choose reputable brands.
When and how should I take beef liver supplements?
Take with meals to enhance absorption. Start with the recommended dose and adjust based on individual tolerance and health goals.
What benefits can I expect from taking beef liver supplements?
Expect general nutritional benefits, improved energy levels, and support for skin, eye, and blood health. However, it's not a substitute for a balanced diet.
Can beef liver supplements replace other multivitamins?
Beef liver supplements are not a substitute for a balanced diet but rather a complement to ensure adequate nutrient intake. They can be part of a comprehensive approach to health.
Research Sources
- https://oneearthhealth.com/products/grass-fed-beef-liver-200-count-sourced-from-new-zealand – This is a product page for a grass-fed beef liver supplement sourced from New Zealand. It highlights the benefits of grass-fed beef liver as a nutrient-dense whole food and provides information on the sourcing and manufacturing of the supplement.
- https://pubmed.ncbi.nlm.nih.gov/37290426/ – This study investigates the impact of maternal nutrition on offspring health, focusing on the role of vitamin B12. It highlights the importance of adequate B12 intake during pregnancy for optimal offspring development and health outcomes, linking it to epigenetic modifications and metabolic programming.
- https://pubmed.ncbi.nlm.nih.gov/32293681/ – This research explores the effects of vitamin A supplementation on iron metabolism and anemia in children. It suggests that vitamin A supplementation can improve iron status and reduce the risk of anemia, particularly in populations with vitamin A deficiency.
- https://www.mla.com.au/globalassets/mla-corporate/research-and-development/final-reports/2019/p.psh.1194-final-report.pdf – This report details a study on the nutritional profile of beef liver from Australia’s Channel Country. It highlights the high quality of protein and amino acids, as well as the nutrient density, which supports the potential health benefits of beef liver as a supplement.
- https://michaelkummer.com/best-beef-liver-supplement-brands/ – This article reviews various beef liver supplement brands, focusing on product quality, sourcing, and nutritional content. It provides a comparative analysis to help consumers choose the best beef liver supplement based on their individual needs and preferences.
