Y9 Biology Revision

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To maintain a healthy diet you need the right amount of each of the 6 (or 7) food groups.

Carbohydrates for energy.

Protein for growth and repair.

Fats for insulation of the nerve cells and energy.

Vitamins and minerals for general wellbeing.

Fibre to keep the digestive system functioning well.

And water to keep chemical reactions going.

To maintain a healthy weight, your energy input and output need to be the same.

To gain weight, your energy input needs to be higher than your output.

To lose weight, your energy input needs to be lower than output

Excess carbohydrate and fat makes you overweight and obese. Obeity can lad to dieseases ik

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