Sugar, energy and crashes

That mid-afternoon slump after a sugary snack is more common than you might think, and understanding why it happens can help you feel steadier all day.

What it is

When we eat foods high in refined sugar, blood sugar rises quickly, giving a short burst of energy and alertness. The body then releases insulin to bring blood sugar back down, and it often overshoots, leaving us feeling tired, foggy, irritable or shaky an hour or two later. This cycle - the sugar crash - can affect mood, focus and even sleep if it happens repeatedly through the day.

Signs to notice

• Energy spikes followed by tiredness or irritability within an hour or two of eating something sugary
• Strong cravings for more sugar shortly after a sweet snack
• Difficulty concentrating in the afternoon, especially after a sugary lunch
• Headaches or shakiness between meals
• Reaching for sugar or caffeine as a regular pick-me-up rather than an occasional treat

What helps

• Pair carbohydrates with protein or healthy fats to slow sugar absorption, for example fruit with nuts, or bread with peanut butter
• Choose whole grains over refined ones - brown rice, oats and whole wheat digest more slowly
• Eat regular meals rather than skipping and then overeating sugary food later
• Notice your triggers - are you reaching for sugar because of hunger, stress, boredom or tiredness?
• Keep healthier snacks on hand, like fruit, nuts, or plain yoghurt, to reduce reliance on sugary options
• Reduce sugar gradually rather than all at once, which is more sustainable and easier on cravings

When to reach out for help

If sugar cravings feel out of control, are tied to emotional eating, or you notice significant mood swings around meals, it's worth talking to a professional. A dietitian can help build a sustainable eating plan, and a counsellor can help address any emotional patterns connected to food.

Getting help in South Africa

Cleared Mind counsellors are available to help you explore the link between eating habits, energy and mood. A registered dietitian can offer tailored guidance for your lifestyle. For general mental health support, contact the SADAG Mental Health Line on 011 234 4837.