Serum T4

    Last Updated: October 13, 2024

    T4 (thyroxine) is one of the two hormone produced by the thyroid gland (along with T3; triiodothyronine). Both act on virtually every part of the body and their deficiency can have wide-reaching effects. "Serum T4" simply refers to the amount of T4 measured in the blood.

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    1,496 participants in 23 trials

    Examine Database: Serum T4

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    Examine Database References

    1. Maca - Meissner HO, Mscisz A, Reich-Bilinska H, Mrozikiewicz P, Bobkiewicz-Kozlowska T, Kedzia B, Lowicka A, Barchia IHormone-Balancing Effect of Pre-Gelatinized Organic Maca (Lepidium peruvianum Chacon): (III) Clinical responses of early-postmenopausal women to Maca in double blind, randomized, Placebo-controlled, crossover configuration, outpatient studyInt J Biomed Sci.(2006 Dec)
    2. Vitamin E - P M Farrell, J G BieriMegavitamin E supplementation in manAm J Clin Nutr.(1975 Dec)
    3. Tetradecyl Thioacetic Acid - Reidar J Pettersen, Mohamed Salem, Jon Skorve, Rune J Ulvik, Rolf K Berge, Jan Erik NordrehaugPharmacology and safety of tetradecylthioacetic acid (TTA): phase-1 studyJ Cardiovasc Pharmacol.(2008 Apr)
    4. Zinc - Kilic MEffect of fatiguing bicycle exercise on thyroid hormone and testosterone levels in sedentary males supplemented with oral zincNeuro Endocrinol Lett.(2007 Oct)
    5. Boron - Nielsen F, Penland JBoron supplementation of peri‐menopausal women affects boron metabolism and indices associated with macromineral metabolism, hormonal status and immune functionJ Trace Elem Med Biol.()
    6. Autoimmune Protocol (AIP) Diet - Robert D Abbott, Adam Sadowski, Angela G AltEfficacy of the Autoimmune Protocol Diet as Part of a Multi-disciplinary, Supported Lifestyle Intervention for Hashimoto's ThyroiditisCureus.(2019 Apr 27)
    7. Ketogenic Diet - Urbain P, Strom L, Morawski L, Wehrle A, Deibert P, Bertz HImpact of a 6-week non-energy-restricted ketogenic diet on physical fitness, body composition and biochemical parameters in healthy adultsNutr Metab (Lond).(2017 Feb 20)
    8. L-Carnitine - Jee Hyun An, Yoon Jung Kim, Kyeong Jin Kim, Sun Hwa Kim, Nam Hoon Kim, Hee Young Kim, Nan Hee Kim, Kyung Mook Choi, Sei Hyun Baik, Dong Seop Choi, Sin Gon KimL-carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double-blind, placebo-controlled trialEndocr J.(2016 Oct 29)
    9. Saffron - Bentolhoda Mousavi, Seyedeh Zahra Bathaie, Farbod Fadai, Zabihollah Ashtari, Neda Ali Beigi, Sara Farhang, Sara Hashempour, Nasim Shahhamzei, Hamid HeidarzadehSafety evaluation of saffron stigma (Crocus sativus L.) aqueous extract and crocin in patients with schizophreniaAvicenna J Phytomed.(Sep-Oct 2015)
    10. Ketogenic Diet - Athinarayanan SJ, Adams RN, Hallberg SJ, McKenzie AL, Bhanpuri NH, Campbell WW, Volek JS, Phinney SD, McCarter JPLong-Term Effects of a Novel Continuous Remote Care Intervention Including Nutritional Ketosis for the Management of Type 2 Diabetes: A 2-Year Non-randomized Clinical TrialFront Endocrinol (Lausanne).(2019 Jun 5)
    11. Vitamin E - Tsai AC, Kelley JJ, Peng B, Cook NStudy on the effect of megavitamin E supplementation in manAm J Clin Nutr.(1978 May)
    12. Vitamin E - Kitagawa M, Mino MEffects of elevated d-alpha(RRR)-tocopherol dosage in manJ Nutr Sci Vitaminol (Tokyo).(1989 Apr)
    13. Iodine - Paul T, Meyers B, Witorsch RJ, Pino S, Chipkin S, Ingbar SH, Braverman LEThe effect of small increases in dietary iodine on thyroid function in euthyroid subjectsMetabolism.(1988 Feb)
    14. Vitamin E - Meydani SN, Meydani M, Rall LC, Morrow F, Blumberg JBAssessment of the safety of high-dose, short-term supplementation with vitamin E in healthy older adultsAm J Clin Nutr.(1994 Nov)
    15. Vitamin E - Meydani SN, Meydani M, Blumberg JB, Leka LS, Pedrosa M, Diamond R, Schaefer EJAssessment of the safety of supplementation with different amounts of vitamin E in healthy older adultsAm J Clin Nutr.(1998 Aug)
    16. Zinc - Kilic M, Baltaci AK, Gunay M, Gökbel H, Okudan N, Cicioglu IThe effect of exhaustion exercise on thyroid hormones and testosterone levels of elite athletes receiving oral zincNeuro Endocrinol Lett.(2006 Feb-Apr)
    17. Iodine - Mulrine HM, Skeaff SA, Ferguson EL, Gray AR, Valeix PBreast-milk iodine concentration declines over the first 6 mo postpartum in iodine-deficient womenAm J Clin Nutr.(2010 Oct)
    18. Maca - Melnikovova I, Fait T, Kolarova M, Fernandez EC, Milella LEffect of Lepidium meyenii Walp. on Semen Parameters and Serum Hormone Levels in Healthy Adult Men: A Double-Blind, Randomized, Placebo-Controlled Pilot StudyEvid Based Complement Alternat Med.(2015)
    19. Ketogenic Diet - Vazquez JA, Kazi ULipolysis and gluconeogenesis from glycerol during weight reduction with very-low-calorie dietsMetabolism.(1994 Oct)
    20. 7-Keto DHEA - Douglas S. Kaiman, Carlon M. Colker, Melissa A. Swain, Georgeann C. Torina, Qiuhu ShiA randomized, double-blind, placebo-controlled study of 3-acetyl-7-oxo-dehydroepiandrosterone in healthy overweight adultsCurrent Therapeutic Research.()
    21. Iodine - Gardner DF, Centor RM, Utiger RDEffects of low dose oral iodide supplementation on thyroid function in normal menClin Endocrinol (Oxf).(1988 Mar)
    22. Iodine - Chow CC, Phillips DI, Lazarus JH, Parkes ABEffect of low dose iodide supplementation on thyroid function in potentially susceptible subjects: are dietary iodide levels in Britain acceptableClin Endocrinol (Oxf).(1991 May)
    23. Ashwagandha - Sharma AK, Basu I, Singh SEfficacy and Safety of Ashwagandha Root Extract in Subclinical Hypothyroid Patients: A Double-Blind, Randomized Placebo-Controlled TrialJ Altern Complement Med.(2018 Mar)