Thymus extract

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Thymus extracts are extracts derived from the thymus glands usually of young calves (bovine). The thymus is a lobular gland found under the breastbone and situated near the thyroid gland. The thymus reaches its maximum size during childhood and plays an important function in the immune system. It is responsible for producing T-lymphocytes and other hormones which in turn play a role in weight regulation, increase in lymphokines and increase of interleukin 2 receptors. Thymus extract is used orally to treat various infectious diseases including respiratory disorders, flu, swine flu, hepatitis B and C, mononucleosis, Epstein-Barr virus (EBV), sinusitis, herpes shingles, AIDS/HIV. It is also taken orally for food allergies, hay fever, asthma, rheumatoid arthritis, cancer, systemic lupus erythematosus, and chronic fatigue syndrome (CFS).

Also known as:  Complexe de Peptides Thymiques, Extracto de Timo, Extrait de Thymus, Extrait Thymique, Polypeptides Dérivés de Thymus, Predigested Thymus Extract, Protéine Thymique, Pure Thymic Extract, Thymic Extract, Thymic Peptide, Thymic Protein, Thymic Protein A, Thymomodulin, Thymosin, Thymosine, Thymostimulin, Thymostimuline, Thymus, Thymus Acid Lysate Derivative, Thymus Complex, Thymus Concentrate, Thymus-Derived Polypeptides, Thymus Factors, Thymus Polypeptides, Thymus Substance

Diseases and Conditions

Thymus extract is possibly effective for allergic rhinitis (hay fever), asthma, cardiomyopathy, food allergies, and respiratory tract infections. There is insufficient information on the effectiveness of thymus extract for other purposes.


Thymus extract is possibly safe when used orally and appropriately. There have been no adverse effects reported. However, since thymus extract is obtained from animals, there is some concern about contamination. There is insufficient information on the safety of thymus extract for pregnant and breastfeeding women; best to avoid.

Medication Interactions

Thymus extract may interfere with immunosuppressants such as:

  • Azathioprine (Imuran)
  • Basiliximab (Simulect)
  • Cyclosporine (Neoral, Sandimmune)
  • Daclizumab (Zenapax)
  • Muromonab-CD3 (OKT3, Orthoclone OKT3)
  • Mycophenolate (CellCept)
  • Tacrolimus (FK506, Prograf)
  • Sirolimus (Rapamune)
  • Prednisone (Deltasone, Orasone)
  • Corticosteroids (glucocorticoids)

Supplement and Food Interactions

None known.


Adult, Oral: Generally, 250-500mg daily is recommended. Thymus extract is taken at a wide range of doses depending on oral or parenteral use and varies on the intended purpose.


Thymus extracts are not found in foods. 

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