Three pantry-level checks (protein, iron, and omega-3s) that changed what I saw in my brush within a month.

Do a 7-day protein audit before you buy another serum

I didn’t want this to be true, but it was: the biggest swing in my shedding wasn’t a $38 “density” shampoo or a new scalp brush. It was me drifting into a low-protein week because I was busy and living on lattes, yogurt that barely counts, and whatever snacky thing was around. Here’s the test I use now, and it’s boring on purpose. For seven days, I write down every meal and rough protein source, then I circle the meals that were basically carbs + vibes. You don’t need an app, but if you like numbers, MyFitnessPal makes it painfully obvious when lunch was a bagel and coffee.

What you’re looking for is consistency, not one heroic chicken dinner. Hair is made of keratin, and your body treats hair like a “nice-to-have” when it’s deciding where to send resources. When my days had 20 g at breakfast and 10 g at lunch, my ponytail felt sad and my shower drain looked like a small animal. When I hit protein earlier in the day, my strands felt a little sturdier when I detangled with a wide-tooth comb, and I wasn’t pulling as much out of my Wet Brush.

My low-effort roster is repeatable: two eggs plus cottage cheese, Greek yogurt that has at least 15 g per serving, a tuna packet, rotisserie chicken, edamame, lentils, or a scoop of whey in a blender bottle when I’m running late. If you’re vegetarian, I had the best luck combining things (lentils + rice, tofu + noodles) instead of pretending one sad salad was enough. And if you’re dealing with major or sudden shedding, new bald patches, or other symptoms, loop in a clinician. Food can help, but it can’t diagnose thyroid issues, postpartum shifts, or iron problems on its own.

Iron isn’t a vibe: notice the brittle fringe and the “won’t grow” zone

I used to describe my hair as “fine” in that polite way people say it when they’re avoiding the word “thin.” Then I noticed something more specific: the little face-framing pieces by my temples were getting short and frizzy no matter how careful I was with heat. I’d smooth them with a pea-size amount of Olaplex No. 6, they’d look decent for two hours, and then they’d stick out again like a toddler cut them. That pattern can come from breakage alone, but for me it lined up with months where I was light on iron-rich foods.

I’m not going to tell you to diagnose yourself in the mirror. You can’t eyeball ferritin, and you definitely can’t “prove” an iron issue with a home test. What you can do is treat your diet like a suspect and make a clean case for it. If you rarely eat red meat, shellfish, beans, lentils, fortified cereal, or dark leafy greens, that’s a data point. If you do eat those foods but you also slam coffee or black tea with every meal, that’s another. Tannins can reduce iron absorption, so I now push my coffee to mid-morning instead of chasing breakfast with it.

When I’m intentionally building iron into a week, I do it in normal-person ways: a bowl of Cheerios (yes, fortified cereal counts) with milk, a spinach omelet, a lentil soup, or a burger once in a while if I’m craving it. Vitamin C alongside plant sources helps, so I add strawberries to cereal, squeeze lemon on greens, or throw a bell pepper into a bean bowl. If you’re thinking supplements, please don’t freestyle high-dose iron because you read a comment thread. Too much iron isn’t harmless, and the right move is a blood test and a conversation, especially if you’re pregnant, postpartum, or have a history of anemia.

The hair-specific payoff I noticed wasn’t overnight “growth,” it was fewer short snapped bits around my hairline and less of that crunchy feel when I ran product through damp ends after a shower. I still use my usual routine (heat protectant, satin pillowcase, and trims when my ends start catching), but the food piece stopped being optional.

Your scalp likes fat: the omega-3 tell is flaky roots with oily ends

This is the strands problem that makes you feel like you’re doing everything wrong: you wash, you blow-dry, your scalp still sheds little flakes on a black shirt, and by day two your mid-lengths look like you dipped them in fryer oil. I spent a stretch rotating shampoos (a clarifying wash, then a “hydrating” one, then a dandruff formula) and it helped a little, but what made it feel more stable was changing how often I ate omega-3-rich foods. Not as a miracle cure. More like taking my scalp out of constant irritation mode.

My tell is texture at the roots. When I’m low on omega-3s, my scalp feels tight right after washing and I get those small, dry flakes that aren’t huge greasy dandruff plates. I can scratch lightly with a fingertip and see a dusting. Glamorous. When I’m consistent with salmon, sardines, trout, chia, flax, or walnuts for a few weeks, I notice less itchiness during styling and I don’t have to rely on dry shampoo (I use Living Proof Perfect Hair Day) just to feel presentable. The lengths also behave better. They still need conditioner, but they stop feeling weirdly brittle while simultaneously looking shiny from oil creep.

If you hate fish, don’t force it. I do a tablespoon of ground flax stirred into oatmeal or yogurt, or chia in a quick pudding. When I do buy fish, it’s the boring stuff I can repeat: frozen salmon portions, canned sardines in olive oil, or smoked trout on a bagel. If you’re pregnant, on blood thinners, or considering omega-3 supplements, it’s worth checking with a clinician, and be picky about brands and storage. Rancid oil is not a vibe, and capsules that have been cooked in a delivery truck won’t do you any favors.

One practical pairing that kept this from turning into a whole lifestyle project: I keep my locks routine the same and change only one food habit at a time. Otherwise you end up crediting the fish for what was really the new leave-in conditioner or the fact that you stopped sleeping with wet hair. When your scalp calms down, you’ll feel it while you shampoo, not as some dramatic before-and-after photo.