T4 (Thyroxine) is a blood test that measures t4 (thyroxine) levels in the blood. It is commonly used to impacts overall metabolic rate and energy regulation, affecting methylation efficiency and cellular health..
What is T4 (Thyroxine)?
The main hormone produced by the thyroid gland.
Why is it measured?
Impacts overall metabolic rate and energy regulation, affecting methylation efficiency and cellular health.
Key Facts
- •Category: Methylation & Longevity
- •Unit of Measurement: pmol/L
- •Test Code: T4_METHYL
Related Methylation & Longevity Markers
Active B12
The biologically active form of vitamin B12.
Learn moreCortisol
The primary stress hormone.
Learn moreD.H.E.A. Sulphate
An adrenal hormone that declines predictably with age.
Learn moreFolate (Vitamin B9)
Circulating levels of folate (B9), a critical methyl donor.
Learn moreFT3 (Free Triiodothyronine)
The unbound, biologically active form of T3, the most potent thyroid hormone.
Learn moreHbA1c
Measures your average blood glucose over the past 2-3 months.
Learn more