Women
Resting Heart Rate for Women by Age: What's Normal at 40, 50, 60 and 70?
What should your resting heart rate be at 40, 50, 60 or 70? See the numbers that matter, what can change your baseline, and how menopause,...
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Notes on cellular health, longevity and daily wellness
A calm, science-informed journal exploring cellular energy, healthy aging, ingredient education and refined daily routines for modern longevity.
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The Journal
Browse articles by topic or explore the latest editorial notes from CELLSHE.
Safety
Extreme Heat and Aging: What Heatwaves Do to Your Body Over Time
Extreme heat may affect more than immediate heat-illness risk. Human studies now link repeated heat exposure with faster biological-aging measures, while new physiology shows how heat...
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Healthy Aging
Is 8 Hours of Sleep Really Best? How Much Sleep Do Adults Need?
Eight hours is a useful target, not a universal rule. We compare 6, 7, 8 and 9 hours, unpack new 2026 biological-aging research, and give you...
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Healthy Aging
Strength Training for Longevity: How Much Do You Need?
How much strength training do you actually need for healthy aging? A practical look at the 2026 evidence, why two full-body sessions a week is a...
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Science
NAD+ Levels by Age: What Human Studies Actually Show
Do NAD+ levels really fall sharply as you age? Human studies tell a more complicated story. Explore the latest evidence across blood, muscle, brain and other...
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Healthy Aging
How to Age Gracefully: The Real Meaning and 9 Science-Backed Habits
A practical, evidence-led guide to aging gracefully by protecting strength, attention, connection and choice as the years move forward.
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Women
Perimenopause Supplements: What the Evidence Supports
The best perimenopause supplement depends on the goal. See what current guidelines and human studies say about magnesium glycinate, vitamins, soy, herbs, sleep, weight and bone...
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Women
Best Vitamins & Supplements for Women Over 50
A no-hype guide to the vitamins and supplements that actually have evidence behind them for women over 50, plus the ones that are oversold.
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Choosing
Renue By Science Review: An Honest Look at the NMN Brand, and Its Alternatives
An evidence-first Renue By Science review:the liposomal, sublingual, and capsule NMN formats, the testing, the real cost, and honest alternatives worth comparing.
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Choosing
Life Extension NMN: An Honest Review and How CELLSHE Compares
Life Extension is an established brand. Here's an honest look at its Life Extension NAD+ Cell Support NMN, and the alternatives for women in midlife.
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Women
Best NAD+ Supplements for Women: How to Choose
There is no single best NAD+ supplement for women. A clear, anti-hype guide to choosing one on the signals that actually matter: form, dose transparency, verified...
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Choosing
Best Resveratrol Supplements of 2026, Compared
How to choose a resveratrol supplement in 2026 - the checks that separate a quality product from hype: verified trans-resveratrol, a third-party COA, and a clearly...
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