Why has the oil separated?
Because there are no emulsifiers or palm oil in it. Stir it back through before use.
Is there added sugar or palm oil?
Not in the plain varieties, which are simply the nut, sometimes with salt. Flavoured spreads differ, so check the jar.
What is the difference between salted and unsalted?
Only the salt. Unsalted suits cooking and baby food; salted is the usual choice for toast.
Are there nut-free options?
Yes — tahini and seed spreads. Check the label for shared-line information if an allergy is severe.
Should it be kept in the fridge?
Not essential. A cool cupboard is fine; the fridge makes it hard to spread.