Most people know that iron deficiency causes anemia. Far fewer know that without copper, iron cannot do its job, no matter how much of it you take.
Copper is the mineral that makes iron usable. Without it, your body cannot build hemoglobin, cannot transport oxygen properly, and cannot maintain a healthy blood count.
How Copper Builds Your Blood Count
- 1. Copper activates iron transport Iron cannot travel through your bloodstream on its own. It needs to bind to a protein called transferrin.
- 2.This conversion is done by ceruloplasmin, a copper-dependent enzyme made in the liver.
- 3.Copper helps your gut absorb iron from food Another copper enzyme — hephaestin — lines the intestinal wall and helps iron cross from your gut into your bloodstream.
A study of 20 children with copper deficiency anemia found that copper supplementation raised average hemoglobin levels from 7.5 g/dL to 11.5 g/dL in just 6 weeks — alongside reduced fatigue and improved appetite.
A large population study of 11,240 adults (NHANES II) found that both low and high serum copper levels were positively associated with unexplained anemia — cases where iron, B12, and folate were all normal.
Signs You May Be Low in Copper
- Persistent fatigue and weakness
- Low hemoglobin despite iron supplementation
- Frequent infections (low white blood cell count)
- Pale skin
- Neurological symptoms — numbness, difficulty walking
- Slow wound healing
Best Food Sources of Copper
| Food | Benefits |
| Sesame and sunflower seeds | Easy, plant-based copper source |
| Dark chocolate | Surprisingly rich in copper |
| Organ Meat(eg: Chicken Liver) | Richest dietary source of copper |
| Cashews and almonds | Good everyday source |
You can also add copper supplements to your current diet in specific doses.
References
:1. Takami & Uchino. International Journal of Hematology, 2025
2. PLOS ONE — Copper Deficiency Leads to Anemia, Duodenal Hypoxia, 2013
3. American Society of Hematology — Serum Copper and Anemia, NHANES II
4. Annals of Hematology — Copper Deficiency Anemia Review, 2018
5. Massivebio.com — Copper: Role in Iron Metabolism and Nerve Health, 2025
6. Linus Pauling Institute, Oregon State University — Copper Micronutrient Review
7. The Smart Monk — Is Copper Deficiency Causing Your Low Hemoglobin? 2024