What a Pathology Tests Can Reveal to a Naturopath

Autoimmune, Cardiovascular, Cognition, General Heatlh, Gut Health, Healthy Skin, Hormones, Nervous System, Nutrient Deficiency, Pregnancy, Thyroid Health, Weight Loss, Women's Health

Thursday, 22 October 2026

How iron, vitamins and minerals contribute to healthy blood, energy production and body function.

We often think about vitamins and minerals only when choosing a supplement. Yet these nutrients are involved in almost every aspect of physiology, from carrying oxygen to producing thyroid hormones and maintaining normal nerve function.

In a naturopathic consultation, investigating possible deficiencies starts with a careful look at symptoms, dietary intake and medical history. Pathology can help confirm some deficiencies, suggest further testing or show that another explanation should be considered.

The aim is not to prescribe more supplements. It is to understand whether a particular nutrient needs attention, and why.

Iron: More Than a Single Number

Iron is essential for haemoglobin, the protein that allows red blood cells to transport oxygen. Too little available iron can contribute to fatigue, weakness and reduced exercise tolerance, although these symptoms have many possible causes.

An iron assessment may include several markers:

Ferritin helps estimate iron stores. Low ferritin can support a diagnosis of iron deficiency, but ferritin may rise during inflammation and sometimes mask low iron availability.

Serum iron measures circulating iron, which can fluctuate and should not be interpreted alone.

Transferrin and total iron binding capacity (TIBC) assess proteins and capacity related to iron transport.

Transferrin saturation helps indicate how much iron is bound to its transport protein.

We also examine haemoglobin, MCV, MCH and RDW from the blood count for changes consistent with anaemia.

If iron deficiency is found, it is important to investigate the cause. Heavy menstrual bleeding, restricted intake, gastrointestinal blood loss, coeliac disease or other absorption problems may be relevant. Simply taking iron without understanding the reason can miss an important medical issue.

Magnesium, Calcium, Phosphate and Vitamin D

Magnesium supports numerous enzyme reactions involved in energy production, muscle contraction and nerve signalling. It is found in nuts, seeds, legumes, leafy vegetables and wholegrains.

A serum magnesium result can identify some abnormalities, but it does not reliably represent total magnesium stored in the body. Diet, symptoms, medicines and kidney function also matter.

Calcium and phosphate are essential for bone health and participate in many cellular functions. Their blood concentrations are tightly regulated, meaning a normal result does not necessarily prove adequate dietary intake.

Vitamin D helps regulate calcium absorption and supports normal skeletal health. Vitamin D testing is appropriate in selected circumstances, but it is not included in every baseline panel.

Interpreting these results together can be helpful when considering nutritional adequacy, kidney function, bone health and medical conditions that affect mineral balance.

What Is a Nutritional Cofactor?

A cofactor helps an enzyme carry out a biochemical reaction. Think of an enzyme as a specialised worker and the cofactor as one of the tools needed for the job.

For example, B vitamins help enzymes process carbohydrates, fats and proteins for cellular energy. Magnesium participates in reactions involving ATP, the molecule cells use to transfer energy.

This does not mean that taking extra B vitamins or magnesium gives everyone more energy. If there is no deficiency or other indication, additional supplementation may offer no benefit.

Thyroid Health Depends on More Than Iodine

The thyroid uses iodine to manufacture T4 and T3. Selenium-containing enzymes help regulate thyroid hormone metabolism, while iron supports an enzyme involved in hormone synthesis. Zinc contributes to normal cellular and enzyme activity.

Useful food sources include seafood and dairy for iodine; eggs, seafood and meat for selenium; legumes and meat for iron; and oysters, seeds and legumes for zinc.

However, excess iodine or selenium can be harmful. Supplements should not be used to “boost” the thyroid without an appropriate assessment.

Importantly, thyroid hormones, TSH, zinc and selenium are not measured by the baseline panel described here. Thyroid testing may be recommended separately if symptoms and history indicate a need.

Nutrients for the Nervous System

Vitamin B12 supports nerve function and normal red blood cell production. Folate is important for DNA synthesis and healthy blood cells, while thiamine and other B vitamins participate in cellular energy metabolism.

Symptoms such as numbness, tingling or persistent brain fog may justify medical assessment and selected testing. A normal full blood count does not exclude B12 deficiency.

B12 and folate are not automatically included in every comprehensive pathology panel. They may require additional requests. Excess supplemental vitamin B6 can also cause nerve damage, making supplement review essential.

From Results to Food-First Care

A personalised plan might focus on iron-rich meals with vitamin C sources, adequate protein, more legumes and leafy vegetables, or addressing a confirmed vitamin deficiency.

Supplementation can be useful when clinically justified, but doses, interactions and monitoring should be individualised. Food patterns, medication use, digestive concerns and individual preferences all shape what a realistic nutritional plan looks like.

Nutritional health is not about taking every cofactor. It is about meeting the body’s needs and investigating why those needs may not be met.

In Part 3, we explore how pathology helps connect metabolic, liver, kidney and inflammatory patterns into a practical wellness plan.

This article is educational and does not replace medical advice or treatment.