Roll Call

“Spleen?”Here!spleen glandular

Animal-derived

Hasn’t appeared in a scanned product yet.

As a supplement

Talk to your doctor or pharmacist.

Roll Call does not check drug interactions or assess personal safety.

A dried, powdered extract made from the spleen of cattle or other animals, sold as a "glandular" supplement.

Why it’s used

Taken by some to support immune function, following the same glandular-therapy tradition as other organ extracts.

What the evidence says

There is no NIH ODS fact sheet and no well-designed human trials demonstrating an effect of oral spleen extract on immune function. As with other glandulars, digestion breaks dietary protein into amino acids before absorption, which is not accounted for in the underlying premise.

Where we looked

There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.

  • PubMed: 19244 records · searched September 2026"Spleen"[Title/Abstract] AND (review[pt] OR "safety assessment"[Title/Abstract] OR "risk assessment"[Title/Abstract] OR toxicology[Title/Abstract] OR toxicity[Title/Abstract] OR characterization[Title/Abstract] OR characterisation[Title/Abstract])
  • PubMed: 76 records · searched September 2026"Spleen"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH]
  • PubMed: 165412 records · searched September 2026"Spleen"[Title/Abstract]

This says what this database holds under these terms. It is not a finding that no research exists.

Context

No standardized dosing protocols exist in clinical research.

Insufficient dataToo little has been studied to say either way.

Rumors

  1. Desiccated spleen supplements help the body rebuild healthy spleen tissue.

    We haven’t found evidence strong enough to support this or rule it out.

    What was measured is not yet noted.

    Who’s saying this

    • Snow Holistic Health — a professional body or practice: functional medicine and chiropractic clinic; sells Standard Process supplements
      How we know who this is
      • “At Snow Holistic Health, we find the root cause of your symptoms and build you a real plan: functional medicine , nutrition, and chiropractic care in Lake Charles.” (their page)
      • “Snow Holistic Health is authorized to sell Standard Process Products, but is not a partner, franchisor, joint venturer, agent, or employee of Standard Process Inc.” (their page)
  2. Beef spleen is the richest natural source of heme iron and supports blood/iron levels.

    Supports — suggestivehealth and safety evidence

    Measured as a biomarker.

    Who’s saying this

    • Ancestral Supplements — a brand: sells freeze-dried grass fed beef organ supplements
      How we know who this is
      • “Understanding that not everyone can access high-quality beef organs, Ancestral Supplements sought out the most pristine grass fed cattle found only in New Zealand and Australia.” (their page)
      • “Today, Ancestral Supplements is known as the founder and leader of “The Beef Organ Supplement Movement.”” (their page)
  3. Spleen supplements boost the immune system.

    Supports — suggestivehealth and safety evidence

    Studied in: patients with advanced breast cancer undergoing chemotherapy.

    Measured as a biomarker.

    Who’s saying this

    • Kiltz Health — a brand: sells health coaching sessions promoting carnivore/keto diet
      How we know who this is
      • “Dr. Robert J. Kiltz is a double board-certified OB/GYN and Reproductive Endocrinologist, the founder of CNY Fertility, and the visionary behind Kiltz Health and the Kiltz Mighty Tribe (KMT).” (their page)
      • “Book a private, 30-minute one-on-one session with a Kiltz Health Certified Coach to receive a personalized roadmap for your health goals.” (their page)
  4. Glandular supplements made from cattle organs can expose users to mad cow disease (vCJD).

    Sources cited — check not cleared.

    A claim about bovine glandular supplements as a group, not this substance alone.

    Measured as a biomarker.

    Who’s saying this

    • Center for Food Safety — an advocacy group: campaigns against industrial agriculture, toxic pesticides and GMOs
      How we know who this is
      • “Center for Food Safety empowers people, supports farmers, and protects the Earth from the impacts of industrial agriculture.” (their page)
      • “For more than 25 years, Center for Food Safety’s pioneering legal, policy, and campaign strategies have led a revolution to transform our food system—curbing the use of toxic pesticides and GMOs in agriculture and promoting an organic, ecological, and just food and farming system.” (their page)
  5. Beef spleen supplements support digestive health (and allergy health).

    Not gradedhealth and safety evidence

    Sources cited — no verdict reached.

    What was measured is not yet noted.

    Who’s saying this

    • Walmart — a retailer: sells fashion, home goods and more; Walmart+ membership
      How we know who this is
      • “The trademarks Walmart and the Walmart Spark design are registered with the US Patent and Trademark Office.” (their page)
      • “Annual members can save $380 per year!” (their page)