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Grassfed Bovine Kidney

Also known as: Desiccated beef kidney, Bovine kidney complex, Grassfed Bovine Kidney, Bos taurus renal tissue

Overview

Grass-fed bovine kidney is a dietary supplement made from freeze-dried or desiccated kidney tissue of pasture-raised cattle. It is considered a nutrient-dense whole food, primarily used for nutritional supplementation, particularly for iron, B vitamins (especially B12), selenium, and zinc. While it offers a concentrated source of these nutrients, it's important to note that research on its specific benefits is still in the preclinical stage, with limited human studies available. The evidence supporting its use is primarily based on nutrient analysis and expert consensus, rather than robust clinical trials. Therefore, its benefits are largely theoretical, based on the known roles of the nutrients it contains. It is generally considered safe at food-level doses, but potential risks and contraindications should be considered.

Benefits

The primary benefits of grass-fed bovine kidney supplementation stem from its nutrient content. It is a significant source of Vitamin B12, potentially providing 693-1,725% of the Daily Value per 100g of kidney tissue. It also contains iron, offering 22-44% of the DV per 100g, primarily in the form of highly bioavailable heme iron. Additionally, it provides selenium, with approximately 256% of the DV per 100g. These nutrients may support red blood cell production, antioxidant defense, and overall micronutrient repletion, particularly in individuals with deficiencies. However, direct evidence for functional improvements from kidney supplementation itself is lacking, and benefits are largely theoretical based on nutrient composition.

How it works

Grass-fed bovine kidney delivers bioavailable nutrients, including heme iron and methylcobalamin (B12). Heme iron is absorbed more efficiently than non-heme iron, with absorption rates of 15-35% compared to 2-20% for non-heme iron. The iron and B12 act as cofactors in erythrocyte production, supporting healthy red blood cell formation. Selenium contributes to antioxidant defense by acting as a cofactor for glutathione peroxidase, an enzyme that protects against oxidative stress. These nutrients interact with various biological pathways to support overall health and physiological function.

Side effects

Grass-fed bovine kidney is generally considered safe at food-level doses. Common side effects are not typically reported in studies of organ meat consumption. However, potential risks include hypervitaminosis A due to retinol content (though this is unquantified in supplements) and purine-related issues that could exacerbate gout. Contraindications include hemochromatosis and selenium hypersensitivity. It is important to note that while beef extract studies have shown no adverse effects on organs or biochemistry at 2x human-equivalent doses in mice, human trials are needed to fully establish the safety profile. Individuals with pre-existing conditions should consult with a healthcare professional before taking this supplement.

Dosage

The typical dosage range for grass-fed bovine kidney supplements is 3,000-6,000mg per day, often taken in 3-6 capsules. For optimal absorption of non-heme iron (though heme iron is the primary form in this supplement), it can be taken with vitamin C. Concurrent consumption with calcium-rich foods should be avoided, as calcium can inhibit iron absorption. While there is no defined maximum safe dose, it is important to follow label instructions and avoid excessive intake. Dosage recommendations are based on general guidelines and may vary depending on individual needs and health status.

FAQs

Is grass-fed bovine kidney effective?

While it provides concentrated nutrients, no RCTs confirm therapeutic benefits. Nutrient content does not guarantee clinical efficacy, so consider it a nutritional supplement rather than a treatment.

When is the best time to take it?

There is no specific timing advantage for absorption. Consistency is key, so take it at a time that fits your routine to ensure regular intake.

Does it support detoxification?

The claim that it supports detoxification is unproven. Focus on its established role as a source of bioavailable nutrients rather than unsubstantiated benefits.

Is it superior to isolated nutrients?

It is not necessarily superior to isolated nutrients for treating deficiencies. However, it provides a range of nutrients in a whole-food form, which some individuals may prefer.

Research Sources

https://pmc.ncbi.nlm.nih.gov/articles/PMC6266735/ – This animal study (n=30 mice) investigated the effects of beef extract over 4 weeks. The findings indicated no adverse effects on organs or biochemistry at doses equivalent to twice the human dose, suggesting a degree of safety. However, the study was not kidney-specific and involved healthy subjects only, limiting its direct applicability to bovine kidney supplementation in humans.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8909876/ – This clinical review confirms the nutrient density of organ complexes, including bovine kidney. However, it emphasizes the lack of efficacy studies specifically evaluating the clinical benefits of these supplements. The review represents expert consensus, providing a Level III evidence assessment, which highlights the need for more rigorous research.
https://www.bannerhealth.com/healthcareblog/teach-me/are-organ-complex-supplements-good-for-you – This article discusses organ complex supplements, noting the need for human trials to establish safety and efficacy profiles. It highlights the absence of dose-response data, indicating a gap in the current understanding of optimal and safe dosages. The commentary underscores the importance of further research to validate the potential benefits and risks associated with these supplements.
https://www.verywellhealth.com/beef-organ-supplement-11710185 – This article provides general information about beef organ supplements, including potential benefits and risks. It emphasizes the importance of consulting with a healthcare professional before starting any new supplement regimen. The article serves as a general overview but does not provide specific research findings or clinical data.
https://www.codeage.com/products/beef-kidney – This is a product page for a beef kidney supplement. It provides information about the product's ingredients and potential benefits, but it does not contain independent research or clinical data. The information presented should be considered marketing material and not a substitute for scientific evidence.