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The birth control conversation your doctor probably didn't have with you about your hair.
Birth control pills can influence hair health, sometimes improving or worsening hair loss. The American Hair Loss Association has specific guidance on this — guidance that most women are never given when they're prescribed the pill. The key variable is the androgen index of the progestin in your specific pill. Here is how to tell which category yours falls into, and what to do if you think your contraception is affecting your hair.
For women who are predisposed to hormonal hair loss or are hypersensitive to hormonal changes, hair loss can occur to varying degrees while on the pill — or shortly after discontinuing its use. The AHLA recommends that women with a family history of hair loss opt for low-androgen index birth control pills. Most women are never told this distinction exists.
If you've ever noticed more hair in the brush after starting or stopping the pill and wondered whether it was related, the answer is: possibly. And the reason you probably weren't told this when you were prescribed it is that the hair conversation rarely comes up in a contraception appointment — even though the American Hair Loss Association has had specific guidance on this for years, medically reviewed again in April 2026.
Birth control pills can influence hair health, sometimes improving or worsening hair loss. Hormonal changes caused by birth control affect hair growth cycles and scalp condition. Choosing the right type of birth control is crucial for those concerned about hair thinning.
The word "right type" is doing a lot of work in that sentence. The effect your pill has on your hair depends almost entirely on which progestin it contains and whether that progestin has androgenic or anti-androgenic properties. That's not something most women are ever told to ask about.
The Androgen Index
Why the same category of medication can help one woman and harm another.
Most combined birth control pills contain two hormones: synthetic estrogen and a progestin. The estrogen component tends to be protective for hair — it extends the anagen growth phase and can actually slow down hair loss in some women. The progestin component is where it gets more complicated.
Progestins vary significantly in how androgenic they are. Some progestins bind to androgen receptors and can trigger the same DHT-related miniaturisation pathway that androgenetic alopecia runs through. These are the high-androgen index progestins. Others are neutral or actively anti-androgenic — they block androgen receptors rather than activating them.
For women who are predisposed to hormonal hair loss or are hypersensitive to hormonal changes, hair loss can occur to varying degrees while on the pill or shortly after discontinuing its use. To minimise the risk of hair loss, the AHLA recommends that women interested in using oral contraceptives opt for low-androgen index birth control pills.
Norgestrel, levonorgestrel, and norethindrone have higher androgenic activity. These are found in some of the most commonly prescribed pills — often the generic first-line options. If hair loss runs in your family, consider birth control options that contain more estrogen than progestin — these pills are low on the androgen index. If you're currently on a pill containing levonorgestrel or norgestrel and you've noticed increased shedding, this is the conversation to have with your prescriber.
Desogestrel, norgestimate, and gestodene have lower androgenic activity. Drospirenone and cyproterone acetate are anti-androgenic — they actively block androgen receptors, which means they may actually help with androgenic hair loss rather than worsen it. Contraceptives with low-androgen index progestins may support stability, while high-androgen index pills may trigger thinning in sensitive users. If you have female pattern hair loss and want to use hormonal contraception, discussing drospirenone-containing pills with your doctor is worth doing.
Some people may find that their hair thins or falls out while they're taking the pill. Others may experience hair loss after they stop taking it. The post-pill shedding is a telogen effluvium — the same mechanism as postpartum shedding. When you stop the pill, estrogen drops sharply, follicles that were held in extended anagen synchronise their exit, and two to four months later the shed arrives. This is temporary and typically resolves within six months. Knowing it's coming — and that it doesn't mean permanent loss — changes how alarming it feels when it happens.
The Mirena IUD has been linked with hair loss, including telogen effluvium. The Mirena releases levonorgestrel locally — a progestin with androgenic activity — and while the systemic levels are much lower than with oral pills, some women with androgenic sensitivity report hair changes. Other IUDs (copper, non-hormonal) have no hormonal effect and therefore no hair-related mechanism. If you use a hormonal IUD and are experiencing hair loss, this is worth mentioning to your gynaecologist as part of the investigation.
What to actually do with this information.
Look up the progestin in your current pill and check its androgen index. If you're on a high-androgen index progestin and have a personal or family history of hair loss, request a switch to a low-androgen or anti-androgenic progestin at your next appointment. This is a reasonable, evidence-based ask.
If you've recently stopped the pill and your hair is shedding, it's almost certainly post-pill telogen effluvium — temporary, predictable, and resolving within six months in most cases. The biology is the same as postpartum shedding: a hormonal shift causes synchronised follicle exit, and the shed arrives two to four months later. It feels alarming. It's usually not permanent.
And if you can't identify any other cause of hair loss and you're on a high-androgen index pill, that's a conversation worth having with your doctor before starting a hair loss treatment protocol — because treating androgenic hair loss while continuing to take an androgenic progestin is working in two directions at once.
Which one depends on which pill — and most women are never told to ask.
Supporting the hormonal environment — daily.
The Hormonal collection addresses the androgenic and hormonal drivers of hair loss from a botanical direction — relevant alongside whatever contraceptive choice you're making.
→ Explore the Hormonal Collection → Explore Hair TreatmentsScience, ritual, and botanical intelligence — delivered daily.
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