Dr. Kara Fitzgerald

7.5K posts

Dr. Kara Fitzgerald banner
Dr. Kara Fitzgerald

Dr. Kara Fitzgerald

@kfitzgeraldnd

Dr. Fitzgerald is the author of Younger You and a naturopathic physician specializing in functional medicine.

เข้าร่วม Nisan 2014
454 กำลังติดตาม5.7K ผู้ติดตาม
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Creatine is one of the most studied supplements, and still misunderstood. 👉 Doesn’t harm kidney function in healthy individuals 👉 Raises creatinine ≠ kidney damage Beyond muscle: brain, metabolism, aging. Mild side effects at most. Full breakdown: drkarafitzgerald.com/2026/03/20/cre…
Dr. Kara Fitzgerald tweet media
English
0
0
0
82
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Rethinking Alzheimer’s risk 🧠 APOE4 ≠ the whole story. New research suggests APOE3 may not be “neutral,” and genetics may play a larger role than modeled. The future? Genetics + lifestyle. DOI: 10.1038/s44400-025-00045-9
Dr. Kara Fitzgerald tweet media
English
0
0
4
109
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Infrared sauna therapy is often discussed as a relaxation or detox practice. But emerging research suggests that heat exposure may influence several biological pathways relevant to longevity.  drkarafitzgerald.com/2026/03/12/inf… for the full blog.
Dr. Kara Fitzgerald tweet media
English
0
0
1
120
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Your tongue is as unique as a fingerprint — scientifically proven! 👅 A study published in the Journal of Forensic Dental Sciences (PMID: 28123263) highlights that no two individuals have the same tongue print, not even identical twins!
Dr. Kara Fitzgerald tweet media
English
0
2
2
88
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
When extrinsic mortality is removed, genetics may explain ~50% of lifespan variation. A new twin study in Science suggests intrinsic aging is far more heritable than previously thought.  Genes aren’t destiny—but longevity medicine may soon include polygenic risk for aging.
Dr. Kara Fitzgerald tweet media
English
0
0
0
106
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
This is worth a drill down …
Guri Singh@heygurisingh

🚨BREAKING: If you've used ChatGPT for writing or brainstorming in the last 6 months, your creative ability may already be permanently damaged. A controlled experiment just proved the effect doesn't reverse when you stop using it. 3,302 creative ideas. 61 people. 30 days of tracking. Researchers split students into two groups. Half used ChatGPT for creative tasks. Half worked alone. For five days, the ChatGPT group outperformed on every metric. Higher scores. More ideas. Better output. AI was making them better. Then day 7. ChatGPT removed. Every creativity gain vanished overnight. Crashed to baseline. Zero lasting improvement. But that's not the bad part. ChatGPT users' ideas became increasingly identical to each other over time. Same content. Same structure. Same phrasing. The researchers called it homogenization. Everyone using ChatGPT started producing the same ideas wearing different clothes. When ChatGPT was removed, the creativity boost disappeared -- but the homogenization stayed. 30 days later, same result. Their creative range had been permanently compressed. Five days of use. Permanent damage 30 days later. A separate trial confirmed it. 120 students. 45-day surprise test. ChatGPT users scored 57.5%. Traditional learners scored 68.5%. AI reduces cognitive effort. Less effort means weaker encoding. Weaker encoding means less creative raw material. You're not renting a productivity boost. You're financing it with your originality. The interest rate is permanent.

English
0
0
0
250
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Spring forward. Biology pushes back. ⏰🧬 Even a 1-hour shift in circadian timing can disrupt sleep, inflammation signaling, glucose regulation, and cardiovascular risk. #CircadianRhythm #Longevity
Dr. Kara Fitzgerald tweet media
English
0
0
2
116
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Sleep protects your brain. 🧠💤 During deep sleep, the brain’s glymphatic system clears metabolic waste, including beta-amyloid linked to Alzheimer’s.  Prioritize sleep to protect cognitive function and brain health.
Dr. Kara Fitzgerald tweet media
English
0
1
2
138
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Epinutrients in leafy greens, herbs, berries, olive oil, and tea help regulate inflammation, mitochondrial function, DNA methylation, and cellular repair. Food isn’t just fuel. It’s biological instruction. #Epigenetics #Longevity #FoodAsMedicine
Dr. Kara Fitzgerald tweet media
English
1
2
7
201
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Chronic stress is linked to shorter telomeres, increased inflammation, and faster epigenetic aging. One study found high-stress women had telomeres equivalent to ~10 extra years of aging. Regulation isn’t optional. It’s longevity medicine. 🧬
Dr. Kara Fitzgerald tweet media
English
0
1
3
134
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
We’re living longer, but nearly 20% of life is spent sick, with serious illness often starting around 63. The Younger You approach uses epigenetics + diet & lifestyle to compress morbidity: ✔️ More healthy years ✔️ Fewer years managing disease Simple. Sustainable. Human.
Dr. Kara Fitzgerald tweet media
English
1
1
2
166
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Seafood can be powerful medicine or an unnecessary toxic exposure. The key? Choosing fish rich in omega-3s without excess mercury or contaminants. I created a free, practical guide to help you make safer seafood choices for you & your family. 👉 drkarafitzgerald.com/safe-seafood-c…
Dr. Kara Fitzgerald tweet media
English
1
1
1
111
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Researchers studying “super-agers” found fewer Alzheimer’s risk genes and more protective variants. Sounds like luck, until epigenetics enters the chat. Genes set risk. Biology decides expression. 🧬 Genetic risk ≠ destiny. DOI: 10.1002/alz.71024
Dr. Kara Fitzgerald tweet media
English
0
2
9
388
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
“You need to become the director of the orchestra of your own health.” That idea sits at the heart of my recent conversation with Sergey Young. We talk about taking agency in your health, coordinating the basics so your biology works with you, not against you.
Dr. Kara Fitzgerald tweet media
English
0
0
4
130
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Walk this way to a better brain 🧠🚶‍♀️ A study found that walking 40 min, 3x/week increased hippocampal size by ~2% and improved memory in healthy older adults—effectively reversing 1–2 years of age-related brain loss.
Dr. Kara Fitzgerald tweet media
English
1
1
4
123
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
Study suggests melanocyte stem cells respond to DNA damage by entering senescence and losing pigment, a trade-off that may reduce melanoma risk. Some aging features may reflect tumor-suppressive biology, not simple decline. DOI: 10.1038/s41556-025-01769-9
Dr. Kara Fitzgerald tweet media
English
1
2
1
142
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
This should concern every parent, clinician, and educator. In a large JAMA study (6,500+ kids), increased social media use ages 9–13 was linked to small but measurable declines in memory, language, and cognition just 2 years later.  doi:10.1001/jama.2025.16613
Dr. Kara Fitzgerald tweet mediaDr. Kara Fitzgerald tweet media
English
1
3
4
172
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
When sleep is short, physiology shifts fast. One counterintuitive buffer: 10 minutes of HIIT. It can boost cerebral blood flow, glucose control, and temporarily restore cognitive performance. A bridge, not a substitute for sleep. #SleepHealth #HIIT #FunctionalMedicine
Dr. Kara Fitzgerald tweet media
English
1
0
1
123
Dr. Kara Fitzgerald
Dr. Kara Fitzgerald@kfitzgeraldnd·
One of the clearest mechanistic links yet between EBV and lupus. New Science Translational Medicine data show EBV can reprogram autoreactive B cells, amplifying immune dysfunction, not just triggering flares. Important for how we think about autoimmunity. PMID: 41223250
Dr. Kara Fitzgerald tweet media
English
0
1
2
161