5 Nutrition Mistakes People Make After 40

As we move into our 40s and beyond, our bodies change—subtly at first, then more noticeably. Energy dips, weight becomes harder to manage, and digestion isn’t quite as forgiving as it once was.

Here are five of the most common nutrition mistakes people make after 40—and what to do instead.

1. Not Eating Enough Fibre

Fibre is one of the most overlooked nutrients, yet it becomes more important with age.

A low-fibre diet can lead to:

• Digestive issues

• Increased cholesterol

• Poor blood sugar control

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Aim to include fibre at every meal—vegetables, whole grains, beans, lentils, nuts, and seeds. Think simple additions like oats at breakfast, adding extra veg to dinner and bean or lentils to lunchtime salads.

2. Focusing on low fat

This is an outdated way of thinking, and inaccurate

We need plenty of fat, but the right fat:

• Omega 3 fats from oily fish support brain health and flexible cells

• Fat in dairy such as yoghurt, cheese and milk help with higher calcium uptake and avoids high lactose

• Fats from avocados are heart healthy and high vitamin E supports healthy skin

• Fats from nuts and seeds provide essential Omega 6 fats but we don’t want too high so balance with more Omega 3 fats.

• Even saturated fat in meat and butter supports cells structure and producing hormones.

  
  

3. Not Getting Enough Protein

Protein becomes more important as you age, especially for maintaining muscle and strength.

Many people under-eat protein, particularly at breakfast and lunch.

Include a protein source at every meal:

• Eggs, yoghurt, cottage cheese or nuts at breakfast

• Chicken, fish, beans, or tofu at lunch and dinner

  
  

4. Relying Too Much on Processed Convenience Foods

Busy lives often lead to quick, processed options—but these tend to be low in nutrients, high in sunflower oil,  high in additives and salt.

Over time, this can impact:

• Energy levels

• Weight

• Long-term health  and increased inflammation

  
  

You don’t need to cook everything from scratch—just aim for simple, whole-food meals 80/20.

5. Ignoring Hydration

Dehydration becomes more common with age and can lead to fatigue, headaches, and poor concentration.

Make hydration a habit:

• Start the day with water

• Keep a glass nearby

• Don’t rely solely on tea and coffee which can increase urine output

  
  

Final Thought

Nutrition after 40 isn’t about restriction—it’s about supporting your body for the long term. Small, consistent changes can make a significant difference to how you feel every day.