What Your Brain Needs After 40: Hormones, Supplements & Longevity with Dr. Kay Linker

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What does a neuroscientist actually think women in their forties and fifties should be doing for their brains? Dr. Kay Linker has real answers, and they are probably not what you expect.

 

I sat down with Dr. Linker, a neuroscientist, researcher, and founder of the female longevity supplement brand Aeonian, for one of the most practical and science‑rich conversations we have ever had on this show. We talk about brain health in midlife, the hormones that protect your neurons, the supplements that are worth your time, and the wellness trends that genuinely frustrate Dr. Linker.

 

No fluff. Just real science explained like your brilliant friend who also happens to have a PhD.

What You'll Learn in This Episode:

• Why exercise is the single best thing you can do for your brain (and why Sudoku isn't cutting it)
• What the blood-brain barrier actually is, why it matters, and how omega-3s protect it
• The truth about HRT, estrogen, and why timing is everything for brain health in perimenopause and menopause
• How dopamine and estrogen work together to shape your mood, motivation, and even your habits throughout your cycle
• What creatine does for afternoon energy and cognitive function, and why women actually need more of it than men
• The science behind spermidine, autophagy, and why this supplement deserves a better name
• What Dr. Linker really thinks about GLP-1s as a longevity drug (her answer may surprise you)
• The wellness myth about cycle-syncing productivity that Dr. Linker says is actually harming women
• What's inside Dr. Linker's female longevity supplement stack and why she created it

Timestamps:

(03:07) — The dinner party brain fact that makes people put down their forks

(04:04) — Common brain myths smart people still believe (including the 10% myth)

(04:38) — Brain health for women in midlife: creatine, HRT, and what changes at menopause

(06:55) — Alli and Dr. Linker on testosterone: energy, emotional sensitivity, and what surprised them both

(08:33) — The blood-brain barrier explained simply, and why it declines as we age

(10:03) — How omega-3s protect the brain (including from air pollution)

(11:10) — What it means that 90% of brain blood vessels are thinner than a strand of hair

(12:22) — The most damaging things women in midlife are doing to their brains without knowing it

(13:07) — Why leg day is better for your brain than arm day (myokines explained)

(13:45) — The sedentary trap: why working out in the morning doesn't undo sitting all day

(14:51) — Dopamine, estrogen, and why you start new habits in your follicular phase

(16:18) — Why you temporarily cannot stand your husband in your luteal phase (science-backed)

(18:25) — Wellness advice Dr. Linker is tired of seeing spread online

(18:50) — The cycle-syncing productivity trend and the subtle misogyny hiding inside it

(21:09) — Creatine at 10 grams: dreams, afternoon focus, and why women need more

(22:05) — Spermidine vs. urolithin A: autophagy, mitophagy, and longevity explained

(24:41) — Peptides for longevity: the good, the promising, and the ones to know about

(26:01) — GLP-1 microdosing: what the research says beyond weight loss

 

Links to great things we discussed: 

• Kay on Instagram
• Aonian
• Kay’s Product Recommendations: One Skin & Azelaic Acid
• Function Health
• Uplift App
• Wise Woman Era
• Alli on YouTube

 

I hope you loved this episode! 🎉 Don’t forget to hit that subscribe button on Apple Podcasts and Spotify so you never miss a thing. And guess what? We're on YouTube! If you're loving the content, show us some love by leaving a review and giving us some stars. It means the world to me! Take care, and stay fabulous! 

 

xo,

Alli