Why does NP Thyroid (natural desiccated thyroid) have an odor?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: July 2, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Research

NP Thyroid has a distinctive odor due to the presence of sulfur compounds in the natural desiccated thyroid derived from pig thyroid glands. This odor is a result of the natural components found in thyroid tissue and is considered a sign of the medication's potency and authenticity. The smell is often described as meaty, porcine, or slightly rotten-egg-like, and it does not indicate that the medication has spoiled or lost effectiveness, as confirmed by the manufacturer, Acella Pharmaceuticals 1. Some patients report that storing the medication in a sealed container in the refrigerator can help reduce the odor, though this is not required for stability. Key points to consider:

  • The odor is a natural result of the medication's composition
  • It does not affect the medication's effectiveness
  • Storing the medication in a sealed container in the refrigerator may help reduce the odor
  • If you notice a sudden change in the smell of your NP Thyroid or if it develops an unusually strong or different odor, you should consult your pharmacist to ensure the medication hasn't degraded, as suggested by various studies on desiccated thyroid extract 2, 3, 4. However, it's worth noting that the provided studies do not directly address the odor of NP Thyroid, but rather discuss the use and effects of desiccated thyroid extract in general, with one study mentioning the potential for harm in the unregulated availability and distribution of desiccated thyroid to the public 2. Additionally, a study on taste and smell defects in patients with hypothyroidism found that treatment with thyroid hormones can reverse these defects, but this is not directly related to the odor of NP Thyroid 5. In terms of the medication's composition and potential effects, a recent study found that desiccated thyroid extract may cause an increase in heart rate, lower body weight, and lower high-density lipoprotein compared with other treatment regimens, but results were conflicting 3. Overall, the odor of NP Thyroid is a natural and harmless result of its composition, and patients should not be concerned about its effectiveness or safety.

References

Research

Desiccated thyroid in a nutritional supplement.

The Journal of family practice, 1994

Research

Defects of taste and smell in patients with hypothyroidism.

The American journal of medicine, 1975

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.