Thyroid Stimulating Hormone

Thyroid marker

TSH

Thyroid Stimulating Hormone

Category: Thyroid
Unit: mIU/L

Pituitary hormone that controls thyroid gland output.

PED Notes

T3 supplementation (cytomel, common in contest prep) will suppress TSH. Prolonged suppression can take weeks to recover. Trenbolone may affect thyroid function in some individuals.

Supplements (for high TSH / hypothyroidism):

  • Selenium -- 200mcg/day, supports T4-to-T3 conversion
  • Ashwagandha -- 300-600mg/day (5% withanolides), may support thyroid function
  • L-Tyrosine -- 1000-2000mg/day (thyroid hormone precursor, under supervision)
  • Ensure adequate Iodine intake

Lifestyle:

  • Reduce stress and improve sleep to normalise cortisol (affects thyroid function)

References:

  • Garber, J. R., Cobin, R. H., Gharib, H., et al. (2012). Clinical practice guidelines for hypothyroidism in adults. Thyroid, 22(12), 1200-1235. DOI: 10.1089/thy.2012.0205
  • Ventura, M., Melo, M., & Carrilho, F. (2017). Selenium and thyroid disease: From pathophysiology to treatment. International Journal of Endocrinology, 2017, 1297658. DOI: 10.1155/2017/1297658
  • Rayman, M. P. (2012). Selenium and human health. The Lancet, 379(9822), 1256-1268. DOI: 10.1016/S0140-6736(11)61452-9
  • Zimmermann, M. B., & Boelaert, K. (2015). Iodine deficiency and thyroid disorders. The Lancet Diabetes & Endocrinology, 3(4), 286-295. DOI: 10.1016/S2213-8587(14)70225-6

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Reference Ranges

Standard Range

0.4 - 4 mIU/L

VitalMetrics Range

0.5 - 3 mIU/L

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