Your fresh start in 2026: A cure for many resolutions – now with a 15% early bird discount!
Transferrin saturation: key marker for iron availability
The transferrin saturation (TSAT) shows how much iron is transported in the blood. Find out what the value means, how it is calculated and when it is conspicuous.
Wissenswertes über "Transferrin saturation (TSAT)"
The transferrin saturation (TSAT) shows how much iron is transported in the blood. Find out what the value means, how it is calculated and when it is conspicuous.
Transferrin saturation: key marker for iron availability in the body
The transferrin saturation is a key laboratory value for assessing iron availability in the blood. It describes the extent to which the body's own transport protein transferrin is loaded with iron - i.e. what percentage of the potential iron binding sites are actually occupied. Transferrin binds iron in the blood plasma and transports it to the cells that need it, especially in the bone marrow to form haemoglobin. Too low a saturation can be an indication of functional or absolute iron deficiency - even if the ferritin values are still within the normal range.
A healthy reference range for transferrin saturation is usually 20-45 %. Values below 20% indicate an insufficient iron supply and often occur in the case of iron deficiency, chronic blood loss, inflammatory processes or malabsorption (e.g. in the case of coeliac disease or irritable bowel syndrome). Values over 45%, on the other hand, can indicate iron overload, as can occur in haemochromatosis or after excessive doses of iron administration (e.g. infusion therapy). In diagnostics, transferrin saturation is therefore an important complementary value to ferritin and CRP in order to detect iron deficiency despite apparently normal ferritin values - for example in chronic inflammatory diseases.
In such cases, functional substances such as lactoferrin can have a supportive effect: As an iron-binding glycoprotein, lactoferrin naturally regulates iron absorption without increasing free iron in the bloodstream. As a result, it can avoid oxidative stress and at the same time improve iron availability - especially in situations where transferrin saturation is pathologically low. In contrast to high-dose iron supplements, lactoferrin promotes a physiologically balanced iron supply, which is better tolerated in the long term.
Literature references:
- Tussing-Humphreys, L. et al (2012). Biomarkers of iron status: which one is the best to use? Current Opinion in Clinical Nutrition & Metabolic Care, 15(5), 540-545.
- Paesano, R. et al (2010). Oral lactoferrin supplementation during pregnancy improves hemoglobin and ferritin levels. Biometals, 23(3), 411-417.
- Camaschella, C. (2015). Iron-deficiency anaemia. New England Journal of Medicine, 372(19), 1832-1843.
Verwandte Produkte
For your universal protection
As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.
UV-protected glass
Lab-tested
Non-GMO
No artificial additives
Product listed on the Cologne List®
Lactose-free
For your iron balance
Specially formulated for your iron balance with plant-based curry leaf iron, Lactoferrin CLN®, and natural Vitamin C from rose hips. UV-protected glass
Lab-tested
Non-GMO
No artificial additives
Product listed on the Cologne List®
Gluten-free
Lactose-free
100% vegetarian fermentation
Die neusten Einträge
3 Posts in this encyclopedia categoryIrritable Bowel Syndrome (IBS) Symptoms
Cervical Cancer
Die meistgelesenen Einträge
3 Posts in this encyclopedia categoryMagnesiumcarbonat
Cologne list
Calorie content
Verwandte Suchbegriffe: TSAT + transferrin saturation + transferrin saturation