Some people do great eating snacks between meals and others not so great.
My advice is this; if snacking is something new to you and you are keen to speed up the metabolism, try experimenting. I would recommend trying a mid morning snack first. Remember that consuming most of your calories in the first half of the day will do more for your metabolism than putting off eating till the back-end of the day.
It is also important to remember that eating good quality foods and nutrients for your main meals doesn’t give you the right to snack on bad calories.
Plan what foods you are going to use for snacks
Tip: Choose just two foods, a protein food and a carbohydrate food and always carry them around with you so you don’t get stuck when you need something to eat.
Only eat natural foods
Tip: Try not to eat anything with multiple ingredients i.e. processed bars etc. For example try fruits and nuts/seeds or nut butter.
Keep your eye on the clock
Tip: Do not eat snacks sooner than 2 hours before your last meal. If it is approaching 4 hours since your last meal you will need to eat something to keep the metabolism ticking optimally.
Experiment with what works best for your body in regards to how often you need to snack and the response it has to the rate of your progress. For instance are you making progress with just a mid morning snack or do you need a mid afternoon snack as well?
Don’t eat snacks for the sake of it if you are not hungry and eating good quality meals plus happy with the way you look.