What ingredient would be altered if you put wholemeal SR flour instead of white flour?

The main ingredient that would be altered by using wholemeal self-raising flour instead of white flour is the fibre content.

Wholemeal flour is made from the entire wheat grain, including the endosperm, germ, and bran. This means that it contains more fibre than white flour, which is made only from the endosperm. Fibre is important for digestive health and can help to lower cholesterol and blood sugar levels.

In addition to fibre, wholemeal flour also contains more nutrients than white flour, including B vitamins, iron, and magnesium.