We talk a lot about dopamine in ADHD—but rarely about what helps make dopamine in the first place. One of the biggest unsung heroes? Iron.
Iron Helps Create Your Dopamine
Iron is essential for an enzyme called tyrosine hydroxylase, which kicks off the first step in dopamine creation: converting the amino acid tyrosine into L-DOPA, the direct precursor to dopamine.
If you don’t have enough iron, that process slows down, which means your brain might struggle to make enough dopamine—exactly what’s already dysregulated in ADHD. A 2019 study found that stimulant medications helped normalize the iron levels in ADHD brains, another reason it’s important to explore those options.
Are people with ADHD more likely to be iron-deficient?
Current research does not find that people with ADHD are more likely to be iron deficient. It’s common to see studies that find differences and studies that don’t, even when they look at ferritin levels vs. iron levels; however, studies have shown worsened ADHD symptoms in people with ADHD who are deficient in iron.
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We also know that people with ADHD tend to be deficient in iron levels in the brain. Brain levels of iron are different than body levels. When the iron is in the brain, it can be used to create the dopamine we need. As noted above, stimulant medication might help eliminate the brain iron deficiency
How to improve your iron levels if you have ADHD
Whether or not you can access medication, it is still important to get enough iron in your diet. If you’re following The ADHD Diet, you should already be getting enough iron for the average person. Of course, every person is different, so here are a few guidelines to follow to help with your iron levels.
Where are you getting iron from?
There are two types of iron in food:
- Heme iron is found in animal products like red meat, poultry, and fish. It’s much more easily absorbed by the body.
- Non-heme iron is found in plant-based foods like beans, spinach, and fortified cereals. It’s harder to absorb—but you can boost absorption by pairing it with vitamin C (think: lentils + tomatoes or spinach + citrus).
If you eat mostly plant-based, you’re not out of luck! You just need to be more intentional with food combinations to get the most out of your iron sources.
What other nutrients to add (or avoid) to aid iron
Nutrients that support iron absorption:
- Vitamin C
- Folate or Folic Acid (Vitamin B9)
Nutrients that support iron usage in the brain:
- Vitamin B6
- Copper
- Zinc
- Magnesium
Nutrients and compounds that can block iron absorption:
- Phytates (found in whole grains and legumes)
- Calcium (especially in high doses)
- Polyphenols (in tea, coffee, and some dark chocolate)
Being strategic with how and when you eat certain foods can make a big difference, but most of this is not critical to think about unless you are chronically iron-deficient. In the typical person, simply eating enough protein and eating enough plants should normalize their iron stores.
Other factors you should consider
If you were born female or have female hormonal patterns, you are at a higher risk for iron deficiency. Additionally, you may experience shifts depending on the hormonal cycle or period of life you are in. Estrogen can affect how your body absorbs iron: More estrogen typically meaning more iron. During the menstruation phase, there is also potential for iron loss. It may be worth discussing with your primary care physician about targeted supplementation if you notice that you feel increased brain fog, dizziness, or emotional reactivity.
Final thoughts
Your diet could be silently impacting your ADHD symptoms—especially if you’re low in iron or not absorbing it well. Optimizing your nutrition might not “fix” your ADHD, but it can absolutely support better dopamine function, mood stability, and mental clarity.
That’s why I sell The ADHD Nutrition Manual: the only bundle on the market that teaches you exactly what to do to help your ADHD using real nutrition science without any of the confusion. Learn more here and grab your bundle today!
