The process ofageing is to a large extent due to the damagingconsequence of free radical action (lipid peroxidation,DNA damage, protein oxidation) (Harman, 1956).Convincing evidence for the association ofoxidative/ nitrosative stress and acute and chronicdiseases lies on validated biomarkers of oxidativestress.
The radioactive iodine uptake test, or RAIU test, is a type of scan used in the diagnosis of thyroid problems, particularly hyperthyroidism.he normal uptake is between 15 and 25 percent, but this may be forced down if, in the meantime, the patient has eaten foods high in iodine, such as dairy products and seafood. Low uptake suggests thyroiditis, high uptake suggests Graves' disease, and unevenness in uptake suggests the presence of a nodule.
This leads to high levels of TSH and low levels of free T4. If your free T4 levels are too lowâthe normal range for T4 is 5 to 13.5 micrograms per deciliterâit's a possible indicator that you have hypothyroidism, even if your previous TSH tests came back normal.Again, the normal ranges vary from lab to lab. Anti-thyroid Microsomal Antibodies Testing.our doctor will measure your TSH levels with a blood test. TSH levels are determined by ranges (all figures in mU/Lâmilliunits per liter). Below are the ranges, according to the American Thyroid Association. However, these numbers are not set in stone.