Glycinate or citrate? What the absorption and sleep trials found, how many Australian women fall short on magnesium, and what to check before you buy.

Wired at 11pm, flat in the morning. The pattern is real, but it is not a diagnosis and no test confirms it. What else produces those symptoms, and the order I would check things in.

An honest look at the 10X Health methylation test sold through Gary Brecka's site: what it measures, what it really costs from Australia, and what no gene test can tell you, ours included.

More advice does not create more clarity. Five questions to work out which part of the noise is actually about you.

Burnout is not a medical diagnosis, so no test can confirm it. What a review of 58 cortisol studies actually found, and the ordinary things worth checking with your GP first.

The trials that compared methylated folate and B12 with the ordinary forms, and the free check worth doing before you buy either.

What a normal blood test does and does not rule out, the ferritin threshold most Australian labs do not flag, and what to ask your GP next.

You can self-request a short list of tests in Australia. What is on the list, what it costs, and why the lab will not tell you what the result means.

There is no such thing as an MTHFR symptom. What a gene result can and cannot tell you, and the bloods worth checking first.

There is no way to tell if you have SIBO from symptoms alone. What a breath test can show, and the cheaper checks worth doing before you pay for one.

Most daily longevity advice has never been tested against anything. Here is the part that has, and three ways to check where you stand this week.

Every deficiency symptom list says the same thing. Here is what Australia's own national blood survey measured, and the one number worth looking up.

Functional medicine testing is real pathology with an unusual menu. What it can answer, what the trial evidence shows, and what to check before you order.

No food raises the serotonin in your brain. What serotonin foods really do, what the one Australian diet trial found, and when to see your GP.

Leaky gut is the everyday name for intestinal permeability, not a diagnosis. What the gut barrier does, what tends to irritate it, and the food and stress changes worth trying first.

Five nutrients that support how your nervous system works (B vitamins, omega-3, magnesium, zinc and fibre), the everyday foods that contain them, and why how you eat matters, not just what.

Your gut does more than digest. A look at the gut-brain axis, the fibre that feeds your bacteria, and what the research links to mood, cognition and your gut barrier.

Your birthday is one number. How your body is actually functioning is another. Here is what biological age means, what influences it, and why it is worth tracking rather than worrying about.

How your nutritional priorities shift from adolescence through the reproductive years to menopause, and where iron, calcium and vitamin D, folate, omega-3 and magnesium fit at each stage.

Coffee before breakfast suits plenty of people. For others it means reflux or an unsettled stomach, and it can compete with iron and calcium absorption. Here is how to tell which one you are.