On Self-Care Sunday we suggested building meals around iron-rich foods and omega-3s. A few of you asked why that made the list at all — so here's the longer answer.
Your body treats hair as non-essential. When resources are short, it prioritizes your heart, brain, and organs, and hair is one of the first things to get deprioritized. That's why nutritional gaps often show up in your hair months before they show up anywhere else you'd notice.
Iron is the one to know about
Iron deficiency is one of the most common nutritional causes of hair shedding in women, and it's frequently missed. Heavy periods, pregnancy, and plant-forward eating all increase the risk.
Here's the part worth knowing: a standard blood panel checks hemoglobin, which can look completely normal while your iron stores are depleted. The test that catches low stores is ferritin, and it isn't always included by default. It's reasonable to ask for it by name.
Food sources: lentils, beans, spinach, beef, oysters, fortified cereals. Pairing plant-based iron with vitamin C — a squeeze of lemon, peppers, tomatoes — helps your body absorb more of it.
Protein, because hair is made of it
Hair is keratin, which is a protein. If you're not eating enough, your body has less raw material to work with. This is one reason hair shedding often follows rapid weight loss or a restrictive eating period — typically two to three months after, which makes the connection easy to miss.
Food sources: eggs, fish, chicken, Greek yogurt, beans, lentils, tofu, nuts.
Vitamin D and zinc
Both have been linked to hair health, and deficiency in either is common — vitamin D especially among people with more melanin, since darker skin produces less of it from the same sun exposure.
Food sources: salmon, sardines, egg yolks, and fortified foods for vitamin D. Oysters, beef, pumpkin seeds, chickpeas, and cashews for zinc.
The part most articles skip: more is not better
This is the section worth reading twice.
Nutrients help hair when you're deficient. Taking large amounts when you're not deficient doesn't help — and with some nutrients, it actively causes hair loss. Excess vitamin A is a known cause of hair shedding. So is too much selenium. Both are found in hair and nail supplements, and both are easy to overshoot if you're taking a multivitamin alongside a beauty supplement alongside a fortified drink.
Biotin deserves its own note. It's in nearly every hair supplement on the shelf, but the evidence for it is weak unless you're genuinely deficient, which is rare. More importantly, biotin interferes with common lab tests — including thyroid panels and the troponin test used to diagnose heart attacks. The FDA has issued a safety communication about this. If you take biotin, tell your doctor before any bloodwork.
The practical takeaway: get tested rather than guessing. Supplementing for a deficiency you don't have is at best a waste of money and at worst part of the problem.
What to actually do this week
- Add an iron-rich food to one meal a day, with something vitamin C alongside it
- Make sure protein shows up at every meal, not just dinner
- If you're taking supplements, read the labels and check whether you're doubling up on anything
- If you've been shedding for more than a few months, ask your doctor for bloodwork — including ferritin, vitamin D, and thyroid
Nothing here is about eating less or cutting anything out. It's about making sure your body has enough to work with, because hair is what your body builds when everything else is already covered.
One more thing
Nutrition is one piece. It won't undo tension damage from tight styling, and it won't treat a scarring condition. If your edges have been thinning, your part is widening, or your scalp is tender or itchy, that's a dermatologist conversation regardless of what's on your plate.
Why Hair Loss Looks Different for Black Women covers what to watch for.
This article is for informational purposes and is not medical advice. Talk to a qualified healthcare provider before starting any supplement or making significant changes to your diet. See our full disclaimer.
