Zenith Within by Dr. Sara Redondo
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Your Telomeres Are a Distraction. Here Is What Actually Predicts How Fast You’re Aging.
Learn why consumer telomere tests fall short, and which biological age markers better predict lifespan, healthspan, and aging pace.
22 hrs ago
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Dr. Sara Redondo
9
4
The BDNF Habits: What Actually Grows Your Brain After 40, and the Specific Dose for Each
BDNF is the protein that determines whether your brain sharpens with age or dulls. Low levels predict cognitive decline and Alzheimer’s risk. Here is…
Jul 11
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Dr. Sara Redondo
19
5
We Are Wrong About What Makes Us Happy. Here Is What the Evidence Says to Do Instead.
Researchers have mapped exactly how we mispredict our own happiness. The strategies that work are specific, replicable, and usually the opposite of what…
Jul 10
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Dr. Sara Redondo
12
9
Why Weight Loss Triggers Weight Regain
Learn how the body’s weight setpoint drives hunger, metabolic slowdown, and regain—and which habits help shift it downward.
Jul 9
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Dr. Sara Redondo
6
4
6
The 66-Day Myth: What the Research Actually Says About How Long Habits Take
The "21 days to form a habit" claim came from a plastic surgeon's memoir, not research. Here is what the UCL study actually found, and why the number…
Jul 8
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Dr. Sara Redondo
10
2
6
The Organ Age Gap: What Blood Protein Clocks Reveal About How Your Body Is Actually Aging, and Which Lifestyle Factors Move the Number
Your organs don't age at the same rate. A Stanford lab now measures each one from a blood sample, and the implications for disease prediction are unlike…
Jul 7
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Dr. Sara Redondo
9
2
Allostatic Load: The Cost of Chronic Stress, and the Score Your Annual Physical Never Calculates
Chronic stress leaves a measurable mark across multiple biological systems. Here is how to calculate your load, what it predicts, and what reduces it.
Jul 6
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Dr. Sara Redondo
11
2
Longevity Through Nutrition: Five Things the Evidence Says That Most People Don’t Know, and the 28-Day Book I Wrote to Apply Them
Most nutrition advice is either too confusing or too generic to actually change anything. Here is what the evidence recommends instead.
Jul 5
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Dr. Sara Redondo
23
2
6
The Inflammatory Subtype of Depression: Why a Common Blood Test May Tell You More About Your Mood Than Your Serotonin Levels
Approximately 1 in 4 people with depression has an immune-driven variant that responds differently to treatment. Here is the evidence, plus a…
Jul 4
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Dr. Sara Redondo
17
2
3
Implementation Intentions: The Two-Sentence Technique That Consistently Outperforms Goal-Setting. Here Is What 94 Studies Say.
Most behavior change fails not from lack of motivation but from a missing piece of planning. Here's the technique, why it works, and a downloadable…
Jul 3
•
Dr. Sara Redondo
16
5
Blood Flow Restriction Training: The Protocol That Builds Muscle at 30% of Normal Weight
Physical therapists have used it for decades. Most adults have never heard of it. Here's what the evidence says, plus a downloadable blood flow…
Jul 2
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Dr. Sara Redondo
5
2
2
GLP-1 Drugs: The Overlooked Side Effect, and Why Eating With Joy Might Be the Best Way to Avoid It
Most people are never told to watch for it, and once you know what it is, it changes how you eat on these medications. Here's my favorite recipe for…
Jul 1
•
Dr. Sara Redondo
22
6
7
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