Friday, October 30, 2026 · Edition updated 6:00 AM ETFRI, OCT 30 · 6 AM ET editionNext edition in Next --:--:--
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Energy: daily energy

Tiredness, fatigue and stamina. What people try, how far the research on each has got, and the products that contain them.

What people try

4Strength trainingStage 4 · Widely recommended · Free or low cost, at home or a gymStrength training, also called resistance training, is exercise that makes muscles contract, often to lift a heavy object against gravity.Main risk: The page warns that overdoing strength exercises can cause exhaustion, sore joints, and muscle pain or injury.4ExerciseStage 4 · Widely recommended · Free, for almost everyoneExercise is anything that gets your body moving.Main risk: Using weight machines improperly can cause back injury.3Protein supplementsStage 3 · Large studies in people · Over-the-counter supplementProtein is one of the more common ingredients in supplements sold to improve exercise and athletic performance.Main risk: The page says high protein intakes seem quite safe, but more than the recommended amounts gives no benefit.2CreatineStage 2 · Small studies in people · Over-the-counter supplementCreatine is a compound stored in your muscles that supplies them with energy.Main risk: Creatine can cause weight gain because it tends to make the body hold water, but it is otherwise considered safe for healthy adults.2Elamipretide (SS-31)Stage 2 · Small studies in people · Prescription, approved only for Barth syndromeA small lab-made peptide that attaches to the inner wall of mitochondria, the parts of cells that make energy.

Products

Sorted by the best research stage of each product's ingredients, then by price. The stage describes research on the ingredient, not proof that the product works.

Supplements 14

MomentousWhey Protein Isolate - Flavor SeriesProtein supplements3 Ingredient research: large studies in people$42.99Transparent LabsGrass-Fed Whey Protein IsolateProtein supplements3 Ingredient research: large studies in people$64.99ThorneWhey Protein Isolate - VanillaProtein supplements3 Ingredient research: large studies in people$65Optimum Nutrition · powderGold Standard 100% Isolate Whey Protein powderProtein supplements3 Ingredient research: large studies in people$103.49Optimum Nutrition · powderMicronised Creatine PowderCreatine2 Ingredient research: small studies in people$14.99Optimum Nutrition · gummyCreatine [+]Creatine2 Ingredient research: small studies in people$16.99Optimum Nutrition · powderMicronized Creatine PowderCreatine2 Ingredient research: small studies in people$20.49Vital ProteinsAdvanced Collagen Peptides + Creatine - UnflavoredCollagen peptides, Creatine2 Ingredient research: small studies in people$24.99ThorneCreatine - Travel PacksCreatine2 Ingredient research: small studies in people$36MomentousCreatine - 90 ServingsCreatine2 Ingredient research: small studies in people$42.99ThorneCreatine - 90 ServingsCreatine2 Ingredient research: small studies in people$44ProHealth Longevity · powderLongevity Creatine Pure Powder - 450 gramsCreatine2 Ingredient research: small studies in people$49.95Elysium HealthCreatine+Creatine2 Ingredient research: small studies in people$70ThorneCreatine - 180 ServingsCreatine2 Ingredient research: small studies in people$84

Recent research

Study in 57 older adults aged 65 and up, 12-week trial

Matching training loads to strength or speed profile in older adults

Older adults trained at loads matched to their speed gap or at loads not matched.

Study in Older adults with possible sarcopenia in one nursing home in China

Short exercise breaks for older nursing home residents with muscle loss

This is a plan for a trial, and it has not reported results yet.

New trial

Comparing exercise mixes for adults over 50 with prediabetes

This trial plans to compare three exercise mixes with a health education group.

Lab study in aged mice, plus human and pig eggs in a lab

A peptide helped older mice have more pups and improved aged egg cells

Researchers gave a peptide to older female mice and their egg cells looked healthier.

Lab study in H9C2 heart muscle cells grown in a lab dish

A peptide eased signs of aging in heart cells damaged by a cancer drug

Researchers treated heart muscle cells in a dish with a cancer drug, then a peptide called SS-31.

See all the latest research →

What others are writing

Recent articles from health journalists, hospitals and universities. We link to them; we don't write or endorse them.

Cleveland Clinic · Jul 27, 2026

What You Need To Know About Protein Powder ↗

Protein supplements: The article explains how protein powder can fit different goals and compares common powder types such as whey, soy, and egg.

health.harvard.edu · Maureen Salamon · Jul 16, 2026

Strength training over decades linked to longer life ↗

Strength training: Strength training for up to two hours weekly over decades is linked to lower risk of dying from heart disease and neurological diseases.

hsph.harvard.edu · Karen Feldscher · Jun 9, 2026

Moderate amount of strength training each week could boost longevity ↗

Strength training: A Harvard Chan study links 90 to 120 minutes of weekly strength training with a lower risk of early death.

Scientific American · Jackie Flynn Mogensen · Jun 9, 2026

Resistance training may boost longevity. But how much do you need? ↗

Strength training: The article says regular strength training may extend lifespan, and asks how much of it is needed for those benefits.

This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.