Choose wholegrain bread to lose weight
Choose a loaf that contains barley, which has a specific mix of dietary fibres that's effective at keeping a lid on appetite.
Choose sourdough bread to protect against diabetes
Buy sourdough bread that's made traditionally, using a 'starter' yeast. Commercial bakeries often replace this starter with dried powdered yeast, so do your research before choosing a loaf, or buy one from your local bakery where you can ask how the bread is made.
Eat wholemeal bread to improve your heart health
Look at the ingredients, and choose a wholemeal loaf that contains actual wholemeal wheat flour, rather than white wheat flour that's been mixed with bran and wheatgerm – as many of them are. The latter contains the same nutrients as genuine wholemeal flour, but has a higher GI, which can elevate LDL cholesterol levels in the long term.
Eat some white bread to avoid an antibiotic-related upset stomach
Choose a high-fibre white bread. These are 'fortified' with fibre to replace what's stripped during the refinement process required to make white flour, and some commonly used fibre-enriching ingredients also promote the growth of beneficial gut bacteria.
Pick a bread made with rye flour to keep your hunger levels under control
Choose the darkest rye bread you can find. Rye bread is made from a combination of rye flour and wheat flour, and the darker the colour, the more rye flour it contains.