Hair Health After 40
Why Your Hair Changes After 40 (And What You Can Do About It)
You could purchase every hair product in existence, but if your hair isn't being nourished from within- you're just wasting time and money.
There's a special kind of betrayal that happens when you hit your 40s and suddenly your hair starts acting like it's been through three divorces and a recession.
One day it's shiny and cooperative. The next day it's dry, breaking, thinning, flat at the roots, weirdly frizzy, somehow greasy AND brittle at the same time.
Cool.
You're not imagining it either. A lot of women over 40 start noticing increased shedding, a loss of density around the temples, slower growth, dullness, fragile ends, scalp issues, and hair that suddenly just "won't hold style".
Here's the part no one tells you though...
Hair health starts WAY before your products do.
Obviously good products matter. And yes, heat damage is real.
But your hair is also a direct reflection of hormones, stress, nervous system health, nutrient levels, protein intake, mineral balance, sleep, and digestion.
Your body prioritizes survival first. Hair is considered "extra", so it's last to receive what it needs.
So when your body is depleted, overwhelmed, stressed, underfed, overstimulated, or lacking nutrients... your hair is one of the first things to show it.
Honestly, most of us are running on caffeine, cortisol, one string cheese, random emotional support supplements from social media, and pure determination.
So let's talk about what actually matters, and I'll share what changes I personally made that brought my hair back to life.
The Biggest Nutrient Deficiencies In Women With Hair Issues After 40
Once I hit this wise, old age- my body no longer put up with my shit, so to speak. So due to health and vanity reasons, I finally decided to break my bad habits, and start treating my body good for the first time ever. It's been a year now, and my results are better than I expected... who knew giving your body it's basic essentials on a consistent basis would prove to be the "cure all" for my issues? (well most of them, anyway)
So here are the essentials...
Protein
This is a BIG one.
Hair is quite literally made of it.
So if you're skipping meals, barely eating, constantly dieting, surviving on snacks, or under-eating because stress killed your appetite... your hair will absolutely reflect it.
You also need SO much more as you age. I aim for 120 grams a day, others will be different. Either way you need a lot of it, and ideally every 2 hours during the day. This comes naturally to some people, but for me I have had to be very intentional and disciplined to maintain this every day. Worth it.
Some protein-rich foods include eggs, greek yogurt, chicken, salmon, cottage cheese, and grass-fed beef.
I’m building lean muscle so my intake is currently high, but you will need to find your own daily recommended amount based on your goals. If you make this intentional and consistent- I promise you won’t only just feel better, but you’ll look healthier and more youthful over time.
Iron
Low iron is EXTREMELY common in women. Why? Periods. UGH.
And one of the first symptoms of not having enough?
Hair Shedding.
Especially if you notice excessive shedding in the shower, fatigue, dizziness, cold hands/feet, brittle nails, or thinning around hairline.
That time of the month can be Hell for women like me who have bad periods. This made me anemic FAST, and I still struggle with it. Taking iron bisglycinate (iron + vitamin C combo that’s gentle on the stomach and easier absorbed) every night, has quite literally saved my life. And hair.
Some iron-rich foods include things like red meat, spinach, pumpkin seeds, and eggs.
IMPORTANT- If you're experiencing symptoms like excessive shedding, fatigue, dizziness, brittle nails, or heavy periods, it's important to see your doctor and request bloodwork to check your iron and ferritin levels before starting an iron supplement. Iron deficiency is common in women, especially after years of hormonal changes and stress, but taking iron when you're not actually deficient can be dangerous.
Magnesium
Honestly, half the internet is running around magnesium deficient and wondering why they feel anxious, inflamed, exhausted, and emotionally unstable. Magnesium supports stress regulation, sleep, nervous system balance, hormone health and more. And chronic stress absolutely affects hair. Some common foods containing it are things like dark chocolate, avocados, pumpkin seeds, and almonds. Even if you eat a relatively healthy diet, a lot of women can still benefit from magnesium glycinate at night because chronic stress, poor sleep, caffeine, hormonal changes, certain medications, alcohol, and everyday life can all increase it's depletion and your body's overall demand for it. There are several different forms of magnesium, magnesium glycinate being the most popular for how gentle it is on the stomach and calming effects on the nervous system.
Hydration
Hydration matters more for hair health than most people realize. If you're dehydrated, your body starts prioritizing essential functions first; and healthy, shiny hair is definitely not at the top of the survival list. Proper hydration supports circulation, scalp health, nutrient delivery, and even helps with dryness and brittleness that a lot of women start noticing more after 40. Personally, I'll usually add up to two packets of electrolyte packets to my water each day because they help your body actually retain and utilize hydration more effectively. I still make sure to drink plenty of regular water in between though, because balance matters and more isn't always better. (LMNT in the Citrus Salt flavor is my favorite one).
Zinc
Zinc is HUGE for hair growth, scalp health, repair, and hormone balance.
Being low can contribute to hair shedding, slow growth, dull hair, and scalp irritation.
I take a SMALL dose around 15mg daily WITH FOOD. Taking more than that can cause a copper imbalance, which can cause premature graying and a loss of pigment in your hair, leading to overall dullness and thinning.
A handful of cashews each day will keep your copper balanced with zinc.
Omega-3s
If your hair feels dry, coarse, lifeless, and brittle... healthy fats matter more than you think.
Omega-3s help support scalp health, shine, inflammation balance, and hormone function.
Best food sources include flaxseed, walnuts, and chia seeds.
Since I don't eat many things containing it, I supplement with Omega-3 gummies every night. I also take L-Theanine (an amino acid found in green tea) for extra nervous system support when I'm feeling more stressed than usual. It increases calming brain chemicals like GABA, serotonin, and dopamine.
Vitamin D
Low vitamin D is incredibly common and can contribute to hair thinning.
Especially if you're indoors a lot, exhausted all the time, always moody, or suddenly shedding more than normal.
Some great sources of vitamin D3 are salmon, egg yolks, fortified foods, and good old sunlight.
I take a vitamin D supplement because I know I'm not getting enough of it naturally.
The Part Nobody Wants To Hear
You cannot fix what's wrong on the outside until you address what's going on within your body. Hair issues are your body's way of telling you something isn't right- so pay attention, and take care of yourself for more reasons that just your hair. I promise once you do, you'll wonder why it ever took you so long.
Hair health at this age becomes a full-body situation.
But before you panic and think you need 47 supplements, start simple.
The Changes I Made That Changed Everything For Me - Simplified (I also had to add in some I forgot to mention)
Drinking 80-120oz of water with one packet of electrolytes added each day
Starting my mornings by eating a small protein-rich snack (like eggs) along with my coffee
I take a LOW dose of only 15mg of zinc per day WITH FOOD (this is a QUARTER of the size of an average zinc supplement) because TOO MUCH ZINC DEPLETES COPPER. These two need to stay balanced for great hair, but they also compete for absorption. I just eat a handful of cashews every day to keep my copper up.
Eating protein-rich snacks every 2 hours; my go-to is Aldi's cranberry trail mix or boiled eggs- these are easy for me to eat when I'm not hungry and help me hit my daily protein goals.
Taking a pre-methylated B-Complex daily; again though, supplements come in doses way too high. So I open a capsule and take about one-third of it with water each day. Taking the entire capsule as suggested on the bottle- is far too much.
Adding one molecular hydrogen tablet to a small glass of water and drinking it immediately after dissolving each morning. This is a controversial one and most will say it's pointless, but ideally this should help with oxidative stress, therefore aiding in overall nervous system recovery. I like it so I take it.
Taking digestive enzymes with every meal because gut health affects everything, including nutrient absorption, brain function, inflammation, and hair health. This is another lesson I had to learn the hard way. Your gut truly is your second brain, and if it’s not functioning right, you may as well forget about the rest.
Taking 200-400mg of magnesium glycinate before bed; regulates your nervous system and aids in digestion.
Taking Benfotiamine (a bioavailable form of B1 a.k.a. Thiamine) every other night for extra nervous system support during extra stressful times.
Taking iron bisglycinate with food daily, and ONLY AFTER LAB WORK REVEALED IT WAS NEEDED.
Eating 2-3 Omega-3 gummies before bed. (most don’t get enough from their daily diets; it’s also worth mentioning this will help with painful cramping too).
This is a random one but well worth the mention; Eating ONE brazil nut every day. These contain so many beneficial nutrients and minerals- including selenium; an essential trace mineral that’s a powerful antioxidant crucial for thyroid function, boosting immunity, heart health, and stimulating hair growth. Less is more here. Consuming too many can lead to selenium toxicity and end up making hair issues worse over time. Always consult with a medical professional as this is NOT medical advice. Again I’m just sharing my personal journey in hopes of helping other women.
At the end of the day, healthy hair usually isn't about finding one magical product. It's about supporting your body consistently enough that your hair finally has what it needs to thrive again.
And no, that doesn't mean perfection.
I still drink caffeine. I still get stressed. I still have days where my nervous system feels like it's running on dial-up internet from 2003.
But focusing on hydration, minerals, protein, hormones, digestion, and overall health made a bigger difference in my hair than any "miracle" product ever did.
If your hair has started feeling thinner, drier, flatter, more brittle, or just... differently lately- you're not crazy, and you're definitely not alone.
Aging isn't the problem. Neglecting ourselves for years while taking care of literally everyone else usually is.
These are simply some of the things that helped me personally get my hair healthier, stronger, shinier, and growing again from the inside out.
And honestly? Your hair deserves more than surviving on dry shampoo and pure exhaustion. 🤍
Disclaimer: I'm not a doctor, nutritionalist, or medical professional. I have been a licensed hairstylist in Texas for almost 20 years, so I understand hair. This post is based on my personal experience and the professional education I have on this topic. Always speak with a qualified healthcare provider before starting new supplements, especially if you have underlying health conditions, are pregnant/nursing, or taking medications.
