Hello Becky,
My suggestion would be a snack which contains both carbohydrates and protein.
The reason is that a carbohydrate only snack, like a digestive biscuit, lasts only for about an hour or so and then your blood glucose will start to drop again.
Here is an example from my own readings 2 days ago:
24:00: 7.2 (15 grams carbs – 2 small biscuits)
01:00: 6.4 (10 grams carbs – 1 digestive biscuit)
02:00: 7.7
03:00: 8.7
05:30: 6.9
06:30: 6.4
So, a carbs only snack doesn’t help, I think.
However, a combination of carbs and protein and fat will raise your glucose and keep it raised for a few hours before the drop.
Such healthy snacks can be:
A Greek yogurt like the Total Fage 0% fat which is about 8 grams of carbs, you can add a small biscuit for added carbs if you need to raise your carbs intake or a handful (30 grams) of nuts (walnuts, hazelnuts, almonds) as their fat content will keep your level steady for longer.
A slice of rye bread (which is a slow release carbohydrate due to its low glycemic load) and 30 grams of edam cheese (the protein and the fat in the cheese will sustain your level)
Alternatively, a slice of bread with a little butter or peanutbutter (again a combination of carbs/fat and protein).
A glass of milk and biscuit or a slice of ryvita.
Hope this helps a little.
Regards
Josephine