Welcome to your advantage.
My weekly newsletter on hormones, longevity, and sexual health, for women and the medical providers who treat them. Scientific. Sassy. A little bit sexy. Never generic.
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Check your inbox for a confirmation from me. The next article lands within the week.
Hormone medicine is weird, political, and frequently absurd. I am not going to pretend it is not.
Here is what shows up in your inbox each week:
Scientific, not generic
Every post starts with the research: the studies, the mechanisms, the actual clinical data. Then I translate it into something you can use. No fluff, no magazine-quiz takes.
Sassy, not boring
I will call out bad medicine, lazy guidelines, and the gaps in your OB’s training. Expect opinions. Expect receipts. Expect the occasional rant.
Sexy, not shy
Sex is a vital sign. Libido, arousal, orgasm, and pain are hormonal questions as much as relational ones. I write about them that way: plainly, clinically, without euphemism.
For women and their providers
Smart women who want real answers to what their body is doing. And clinicians who are tired of the training gap in midlife and sexual health care. I trust you both to handle the details.
Things I will not post anywhere else
The case that surprised me, the study that annoyed me, what I changed in my own protocol. Substack gets it first, and sometimes only.
Spotted, Smitten and Soon
The monthly roundup: where I will be, what I am watching, and what I am loving right now.
At least one new article a week. Sometimes two. No algorithm deciding what you see.
Start with these.
Three of my most-shared posts: a taste of the range before you subscribe.
The newsletter is the weekly version. The book is the whole argument.
The Female Longevity Advantage. On sale February 23, 2027. Pre-orders open.
Why women outlive men, why the ovary is the pacemaker of female aging, and exactly how to keep the advantage you were born with. Little, Brown Spark.
Pre-order the book, in any format, and three bonuses arrive by email, starting with my 14-page Midlife Hormone Field Guide.
Come hang out in my inbox.
One email a week, sometimes two. No clickbait, no upsells, no algorithm deciding what you see. Just me, writing to you directly.
Dr. Amy Killen, MD
Emergency physician turned longevity and hormone doctor. Creator of the HOT Provider Course, co-pioneer of the Full Body Stem Cell Makeover, 200K+ followers on Instagram, and the author of The Female Longevity Advantage (Little, Brown Spark, February 2027).
© 2026 Dr. Amy Killen, MD. All rights reserved.