PubMed study library

Every reviewed study gets its own page.

This library collects the individual PubMed-backed studies behind Geebs Science. Use these pages for the coaching interpretation and honest limits; use the linked PubMed source for primary study details.

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Study pages make the science easier to understand and use.

The science hub explains the whole library. Clear answer pages cover common questions. These study pages sit underneath both: one study, one coaching takeaway, one honest limit, one link to the PubMed source.

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Find the study behind the advice.

Search by topic, supplement, question, author, or finding. Every result opens a plain-English takeaway and the original source.

Showing 96 of 96 studies

SleepWearable and app-data analysis

Phone in bed is not neutral

One of the easiest sleep upgrades is environmental: keep the phone out of bed before trying to optimize supplements.

Kheirinejad et al.. Personal and Ubiquitous Computing. 2022. PMID 36405389. DOI 10.1007/s00779-022-01694-w.

Honest limits

This study can inform a sleep-routine experiment, but it cannot diagnose insomnia or guarantee that removing your phone will fix your sleep.

Read the plain-English study breakdown

Original study links

Study pages make the science easier to understand and use.

Find the study behind the advice.

Phone in bed is not neutral

Bright screens can push sleep later

Restricting phone use before bed helped sleep

Late caffeine can still hit sleep

Short sleep can raise snack drive

Sleep loss can shift snack calories

Protein can help you feel fuller

Your food environment keeps prompting you

Food environment changes intake

Lifting can support healthy aging

A mix of movement is linked with long-term health

Protein supports the training signal

Cardio and lifting solve different problems

Strength work is health work

High protein protects the cut

Cardio dose can interfere with lifting

Fasting works when it helps the deficit

16:8 can work when training and protein stay intact

Time-restricted eating is a structure, not a guarantee

Creatine supports lifting, it does not replace it

Resistance training supported brain-health markers

Creatine worked best behind hard resistance training

Protein evidence is thinner in medically complex adults

HIIT is not automatically better

The energy gap still matters

GLP-1 weight loss still needs a muscle-protection plan

Tirzepatide changes fat and lean mass

Semaglutide lean-mass data needs context

Resistance exercise belongs beside GLP-1 care

Collagen peptides are not a muscle-building shortcut

Caffeine timing has a real sleep cost

Cardio helps fat loss, but dose matters

Fat-loss training works best when tools are combined well

Whey works best when paired with training context

Creatine can support lifting-driven body composition

Exercise is brain-aging work too

Muscle growth needs a real prescription, not random workouts

More sets can help, but recoverable volume wins

Advanced lifting methods are tools, not requirements

Time-restricted eating still has to solve calories

Intermittent fasting is a structure, not a guarantee

Fasting outcomes still need protein and training context

Time-restricted eating works best when the training week still works

Ultra-processed foods can make overeating easier

BPC-157 has hype, but human evidence is still limited

Injectable peptides need clinician-level caution

GLP-1 body-composition changes need a muscle plan

GLP-1 nutrition still needs protein and habits

GLP-1 users may need nutrition support, not less structure

Researchers are testing protein plus lifting during GLP-1 therapy

GLP-1 use does not automatically mean muscle loss

Bad sleep can make training feel harder

Caffeine can mask poor sleep, but it is not recovery

Creatine's aging story is not just muscle

Creatine works best as training support

Strength training is metabolic health work too

Older women still respond to resistance training

Fiber helps fullness without diet drama

Protein supplements are support, not the program

Eating speed can change calorie intake

Physical activity remains central to healthy aging

Older adults can still build fitness capacity

Cardio fitness is a major health signal

Fitness matters even when body weight is imperfect

Carbs support training, but they are not a hypertrophy switch

Protein timing is secondary to total intake

More sleep helped sleep health, not every metabolic marker

GLP-1 weight loss needs a muscle plan

GLP-1s lower fat, but lean mass still needs attention

Fat loss and muscle loss must be separated

Lifting protects muscle during fat loss

Protein source matters less than the whole plan, but quality still matters

Low appetite can create nutrition gaps

Omega-3 may support recovery, but it is not the recovery plan

A small lifting trial found promising omega-3 signals

Fish oil is not a direct muscle-building replacement

Omega-3 works as an add-on, not an exercise replacement

Poor sleep can make a fat-loss plan harder to follow