Guide
Vitamin D3 and K2: what has been proven about the combination
Vitamin D3 and K2: what is substantiated about the combination The essentials at a glance The two letters appear together on many packages. They do not appear together in the reviewed professional sources. A great deal has been documented about...
Magnesium in Serum and Whole Blood: Two Statements
Magnesium in serum and whole blood: two different messages The essentials at a glance One thing about magnesium is clearly documented: The serum value reflects the amount in the body poorly. The medical literature states this with unusual clarity. This...
Measure first, then supplement: why it makes sense
Measure first, then supplement: the case for it The essentials at a glance IQWiG answers the question of whether dietary supplements are beneficial in three words: generally not (as of September 3, 2025). However, the same source mentions an exception,...
Vitamin B12 on a vegan diet: the question of timing
Vitamin B12 on a vegan diet: the question of timing The key points at a glance What makes this value unusual is not its level but its timeline. According to the MSD Manual, the liver stores cover requirements for three...
Thyroid and weight: what the sources show
Thyroid and weight: what the sources show The essentials at a glance There is a documented connection, and it is described as smaller than most people expect. The MSD Manual, professional edition, lists slight weight gain as a symptom of...
The LDL-to-HDL ratio: what it actually indicates
The LDL-to-HDL ratio: what it actually says The essentials at a glance The idea behind a ratio is correct: Relating two values to each other says more than a single number alone. The commonly used quotient, however, is not the...
Sweeteners and blood sugar: what has been proven
Sweeteners and blood sugar: what has been established The essentials at a glance Few nutrition topics generate as many conflicting statements as sweeteners. That is why this article begins not with an answer, but with the state of the evidence....
Translate hormonal symptoms into values
Translating hormonal symptoms into values The essentials at a glance This article takes the opposite approach to most texts on the subject. It does not begin with symptoms, but with the question of which observation leads to which laboratory value....
Cortisol and weight gain: what is actually proven
Cortisol and weight gain: what is actually supported by evidence The essentials at a glance The direction is less clear than it is usually portrayed. The MSD Manual, professional edition, notes that increases in urinary free cortisol between 100 and...