Vitamin B12 and Energy: Who Benefits and Who's Wasting Money
Vitamin B12 and energy: B12 ends tiredness caused by a deficiency but adds none at normal levels. Who is at risk, the signs, and whether shots are worth it.
Energy, Nutrition & Exercise
Food, movement, caffeine and ergonomics for steady energy through the day.
Supplements: a skeptical guide
Energy fundamentals
Where Does Your Energy Come From? The Biology in Plain English
Where does energy come from? Sunlight stored in food, which your cells burn with oxygen to make ATP. The 3 energy systems, and why you can still feel tired.
Personal Energy Audit: Track What Drains and Restores You for One Week
A personal energy audit: rate your energy 3 or 4 times a day for 7 days, note what you were doing, then sort drains from restorers. With a log and an example.
Why Am I Always Tired? Common Causes and When to See a Doctor
Why am I always tired? In a review of 26 primary-care studies, depression was found in about 1 in 5 tired patients, serious physical disease in about 4 in 100.
Exercise for energy and the brain
Zone 2 Training Explained: Sorting the Trend From the Evidence
Zone 2 training is easy, conversational cardio. A 2025 review found no good evidence it beats harder exercise for mitochondria or fat-burning capacity.
How Much Exercise Do You Need? The Official Guidelines Explained
The WHO advises adults to aim for 150-300 minutes a week of moderate activity, plus strength work twice. What counts, how to split it, and why some beats none.
Does Exercise Give You More Energy? What the Research Says
Does exercise give you energy? Randomized trials say yes on average, by a modest amount that builds over 6 weeks or more, with one key exception.
Eating at work and meal prep
Healthy Snacks for Work: What to Keep in Your Drawer
Healthy snacks for work in 3 lists (drawer, fridge, bag) built on protein, fibre and healthy fat, with portion sizes and notes for allergies and diabetes.
Orthorexia: When Healthy Eating Becomes an Obsession
Orthorexia is a fixation on 'pure' eating that harms health or daily life. A 2024 review of 22 reviews found no reliable count. Warning signs and help routes.
Walking and exercise snacks
Walking After Meals: What Research Shows About a Short Stroll
Walking after meals for 10 to 20 minutes eased the rise in blood sugar in small trials. What research shows on timing, pace, digestion and weight.
Do You Need 10,000 Steps a Day? Where the Number Came From
The 10,000-step goal began as a 1965 Japanese pedometer's name. A 2025 review of 57 studies found the steepest gains up to about 5,000 to 7,000 steps.
Caffeine, energy drinks, alcohol, and hydration
How Much Water Do You Really Need? Hydration Myths and Facts
EFSA puts adult water needs at about 2 liters a day for women and 2.5 for men, counting food, tea and coffee. No study backs eight glasses of plain water.
How Much Caffeine Is Too Much? What Health Agencies Say
The FDA, EFSA and Health Canada set 400 mg of caffeine a day as a ceiling for healthy adults, not a target. Pregnancy, teens and some conditions call for less.
Eating for steady energy
How to Eat for Steady Energy All Day: The Basic Principles
6 eating habits for steadier daytime energy, graded by evidence: why sugar is a poor pick-me-up, how lunch meets the afternoon dip, and glucose spikes.