Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — toxic elements testing

Urine, serum, plasma, whole blood, red blood cells, feces, hair, fingernails—the list of biological samples used for element testing is long. But choosing the right sample type is one of the most critical decisions in producing results that are clinically meaningful and scientifically valid.

Brazil nuts are widely used as a natural selenium supplement, but the selenium content in each nut varies enormously depending on soil conditions, region, and even individual trees. While selenium is essential for thyroid function, antioxidant defence, and overall health, both deficiency and excess carry serious risks. This article explains why Brazil nuts are so variable as a selenium source, what the safe daily intake looks like, and why testing your selenium levels is the most reliable way to know whether your intake is adequate, insufficient, or dangerously high.

That shiny bracelet or pair of earrings may look harmless — but it could contain cadmium, a toxic heavy metal ranked the 7th most significant threat to human health. With a half-life of 10–30 years in the body and no safe level of exposure, understanding where cadmium comes from and testing your levels is a smart step for long-term health.

Iodine deficiency is more common than many realise. This guide walks through how to assess iodine status using dietary recall, symptom profiling, and a three-part laboratory panel — including thyroid function, thyroglobulin, and urinary iodine and bromine testing.

Crystal glassware looks beautiful, but it may be silently adding lead to your wine. With no safe level of lead exposure established, understanding where your exposure comes from — and testing your levels — is a smart step for long-term health. Read on for the science, the risks, and what you can do about it.