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Last summer I was getting ready for tennis and I pulled my hair back into a ponytail — something I’ve done a thousand times — and I had flyaways everywhere. Not the cute kind. The kind that made me think my hair was actually breaking off from being pulled back too much.
I genuinely panicked. I started mentally calculating how many ponytails were too many ponytails and whether I needed to start showing up to tennis with my hair down like some kind of romantic movie protagonist who definitely does not sweat.
Luckily I had a hair appointment shortly after. My hairdresser took one look and told me it was all new growth. Not breakage. New hair.
For the first time since turning 40 I felt like something was actually going my way in the hair department.
But that moment made me realize something — I had been so focused on worrying about what my hair was losing that I hadn’t stopped to actually understand what was happening to it. So I did the research. And here’s what nobody tells you.
Your hair doesn’t just change after 40 — it changes for a reason
The biggest shift happens because of hormones. As estrogen and progesterone levels start to decline — which begins happening in your late 30s and accelerates through your 40s — your hair growth cycle changes along with them.
Here’s what that actually means in plain English:
Your hair grows in cycles — a growth phase, a transition phase and a resting phase. Estrogen keeps hair in the growth phase longer. When estrogen drops, hair spends less time growing and more time resting. The result is hair that grows more slowly, sheds a little more and feels thinner overall.
It’s not your imagination. It’s biology.
The three things most women notice first
If you’re over 40 and your hair feels different than it used to, you’re probably experiencing one or more of these:
More shedding than you remember. Finding more hair in the shower drain or on your brush is completely normal as the growth cycle shifts. It feels alarming but for most women it’s not actual hair loss — it’s the cycle speeding up slightly.
Less volume and fullness. The individual strands themselves can become finer after 40 which means the same number of hairs takes up less space. Your hair isn’t necessarily thinning — it’s just changing texture.
Slower growth. This one frustrated me the most. Hair that used to grow quickly seems to just… stop. Again this comes back to the growth cycle spending less time in the active growth phase.
What makes it worse — and most of us are doing at least one of these
Here’s the honest part. Some of what we do to our hair in our 40s makes the situation significantly worse without us realizing it.
Pulling it back too tight too often. I’m guilty of this with tennis. Repeated tension on the hairline can cause breakage and even traction alopecia over time. A looser ponytail or a silk scrunchie makes a real difference.
Using the wrong products. Heavy products that work beautifully on thicker younger hair can weigh down finer mature hair and make it look flat and lifeless. What worked in your 30s might not be what your hair needs now.
Skipping scalp care. This is the big one. Most of us focus entirely on our hair and completely ignore our scalp — which is where hair actually grows from. A neglected scalp means a compromised growing environment. More on this in my next post.
Over washing or under washing. Both cause problems. Over washing strips natural oils that protect the hair and scalp. Under washing leads to buildup that can clog follicles. Finding your hair’s actual rhythm matters more after 40 than it did before.
What actually helps
gk hair Moisturizing Shampoo & Conditioner
Remilia Rice and Shine Leave-In Conditioner
I want to be careful here because I’m not a dermatologist and I’m not going to pretend I have all the answers. What I can tell you is what has made a genuine difference for me personally.
Scalp first thinking. Treating my scalp the way I treat my skin — with intention, with the right ingredients, with consistency — changed everything. I’ll go deep on this in my next post because it deserves its own conversation.
Gentler cleansing. Switching to a sulfate free shampoo made a noticeable difference in how my hair felt after washing. Less stripped, more manageable.
Biotin supplementation. I’ve been taking biotin gummies consistently and while I can’t say with certainty it’s the reason, my hairdresser keeps commenting on how fast my hair grows. I’ll take it.
Loosening up. Both literally — fewer tight ponytails — and figuratively. Stressing about hair changes can actually make them worse because cortisol affects your hair growth cycle too. Which feels deeply unfair but here we are.
The thing I want you to remember
Your hair isn’t giving up on you. It’s responding to changes that are completely normal and almost universal for women in their 40s. Understanding why it’s changing is the first step to actually doing something useful about it.
And sometimes those flyaways you’re convinced are breakage? They’re new growth.
I’ll take that kind of surprise any day.
Everything I use for my hair is linked in my LTK — you can find that here. And stay tuned for my next post where I’m sharing the exact scalp care routine that changed my hair after 40 — step by step.
