
We all remember the iconic slogan: “A Mars a day helps you work, rest, and play.” Written by the famous racing commentator Murray Walker in 1959, this catchy line became ingrained in our culture. Back then, the idea that sugar gave you an energy boost seemed simple and true. But does it really work that way?
If you’re working from home, stuck on Zoom calls, or typing away at your desk, it’s tempting to reach for something sweet when fatigue hits. It feels like a quick fix. But let’s unpack whether that sugary snack truly helps.
The Sweet Truth About Sugar
Mars claimed: “Glucose and sugar give you energy while you work.” That’s partially true—our bodies need glucose to produce energy. But here’s the catch: our bodies are designed to produce glucose from the carbohydrates, proteins, and fats we eat.
A Mars bar, for instance, contains 31g of sugar—over seven teaspoons! Eating this kind of sugary treat releases glucose rapidly, causing a surge of insulin, the hormone responsible for moving glucose into cells for energy. While this might provide a brief energy boost, the aftermath isn’t so sweet.
The Sugar Rollercoaster
After the glucose rush comes the crash. Insulin clears glucose from the bloodstream quickly, leaving you tired, grumpy, and craving more sugar.

Over time, consistently spiking your glucose levels can lead to insulin resistance, where your cells no longer respond to insulin effectively. This not only drains your energy but also increases your risk of type 2 diabetes and other health problems like cardiovascular disease.
Dr. Zoë Harcombe, a public health nutrition researcher, warns:
“Sugar is the only substance that humans ingest that has no nutritional value whatsoever... we’re getting fat and sick at the same time.”
The Solution
Instead of the sugar rollercoaster, consider a diet that stabilizes your energy levels. The Mediterranean diet, widely regarded as one of the healthiest, emphasizes whole, unprocessed foods like:
Fruits,

Vegetables,
Whole grains,
Nuts,
Seeds, and
Olive oil.
These foods release glucose slowly, providing sustained energy without the spikes and crashes.
Pair this with daily physical activity—like a brisk 30-minute walk—and you’ll feel recharged and energized, no sugar required.
A Simple Challenge
Why not try this approach for three weeks? Replace sugary snacks with whole foods, enjoy balanced meals, and move more. You might be surprised by how much better you feel—steady energy, fewer cravings, and perhaps even better sleep.
However, if you have conditions like diabetes, heart disease, or Crohn’s, consult your GP before making dietary changes.
Let’s leave the sugar rush behind and embrace a healthier way to work, rest, and play!
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