Falling asleep at your desk but already met your caffeine limit for the day? Try one of these energy-boosting snacks instead of going for another cup of coffee. They’re simple and can give you the energy you need to power through the rest of the workday.

1. String Cheese

If your perception of string cheese is that it’s just a snack for kids, think again. String cheese has great benefits that can keep you going. In addition to carbs from the milk, there’s a good dose of protein and calcium. There’s even a ‘light’ option that’s healthier as it has less saturated fat. You can even mix it up with some fruit or beef jerky if you’d like.

2. Trail Mix

Not just for hikers, trail mix is an excellent source of good fats, fiber, and protein and is always a good choice when it comes to snacks that give you energy. Even if you don’t like the varieties offered by snack brands, you can always make your own with the exact kinds of nuts and fruits you like.

3. Hummus and Vegetables

A Mediterranean dish that’s made from chickpeas, sesame seed paste, olive oil, and lemon juice, hummus is full of fats and protein. Combined with some vegetables, this snack is an easy and healthy way to help sustain enough energy to get you through the workday.

4. Yogurt

Yogurt–particularly Greek yogurt– is a great source of protein. You can easily add fruit, granola, or oats to keep yourself full and going longer.

5. Oatmeal

Carbs are your body’s primary source of energy. While the extra boost you get from them might not last as long as protein (since protein takes longer to break down), whole grains such as oats do last a little longer and contain B vitamins like niacin, thiamin, and folate, that work together to help metabolize energy.