Shopping for items that improve your health may not be as exciting as, say, upgrading your fitness wardrobe. But gadgets and garb that up your sleep, hygiene and healthy-cooking routine are always a good investment.

We scoured Amazon to find the best of the best. Add these to your cart ASAP.

This LEVOIT air purifier can keep even the most microscopic allergens out of your home, including pollen, mold, dust mites and pet dander. Plus, this machine can even be set to auto where it automatically adjusts the fan speed based on the air quality in your home.

Another bonus? The fan on this purifier is ultra-quiet, so you can leave it running throughout the day and night with no disturbances.

​Buy it:​ Amazon.com; ​Price:​ $249.99

Many people spend a big chunk of their day seated at a desk, and without proper posture, you may find yourself growing more and more uncomfortable there.

Ergonomic office chairs provide the back support needed for long days and can be fully adjusted so you can get the proper setting for your height (hint: You want your knees at a 90-degree angle).

​Buy it: ​Amazon.com; ​Price:​ From $31.99

Struggle with seasonal allergies? A vacuum with a HEPA filter can make a pretty big difference. This Shark vacuum has a complete anti-allergen seal and traps more than 99.9 percent of dust and allergens lying around your home.

The dust cup has a large capacity, too, so this machine is suitable for small and large homes alike. And it has a special tool to help you clean those tight crevices, as well as a self-cleaning Pet Power Brush that's designed to remove stubborn pet hair or dirt from carpeted stairs and upholstery.

What's more: More than 8,000 reviewers have given the vacuum a five-star rating.

​Buy it: ​Amazon.com; ​Price:​ $219.99

If you haven't already invested in an air fryer, now is the time. After all, who doesn't want to enjoy crispy fries or nuggets with a fraction of the oil?

This machine also works as a toaster oven, and it has an extra-large capacity, so you can bake something as large as a 13-inch pizza or toast up to nine slices of bread at the same time.

​Buy it: ​Amazon.com; ​Price:​ $255.99

There's nothing wrong with treating yourself to the occasional smoothie out. But pricey beverages can add up quickly, and they're often loaded with added sugar or preservatives.

Making your breakfast smoothies at home is generally cheaper and more nutritious — and with a Vitamix, way more fun. These powerful machines are practically blender royalty and you don't have to stop at smoothies. You can try your hand at homemade ice cream or soups.

The best part? These blenders are self-cleaning. All you have to do is drizzle in a drop of dish soap, add some water and turn it on.

​Buy it:​ Amazon.com; ​Price:​ $289.95

One simple way to cut back on sugar or alcohol is to swap sodas and cocktails for sparkling water. And with this soda water maker, you won't even need to make a trip to the grocery store.

You can get experimental with some at-home fizzy mocktails or just toss some frozen fruit into a cold glass of soda water for a simple sip.

​Buy it: ​Amazon.com; ​Price:​ $69.99

Sleep is essential for a healthy body and mind, and a good mattress can make a big difference in the quality of your slumber.

With nearly 100,000 5-star reviews on Amazon, it's safe to say the Zinus memory foam mattress is a fan favorite.

Choose between different mattress heights to customize your ideal bed.

​Buy it: ​Amazon.com; ​Price:​ $180

Some sleepers need a little extra cushion for a good night of rest. But instead of investing in a whole new mattress, consider a budget-friendly mattress topper. This topper molds comfortably to your body and the ridges in the design add pressure relief.

Plus, this one is CertiPUR certified, too, so you don't need to worry about any harmful chemicals.

​Buy it:​ Amazon.com; ​Price:​ From $28.14

This sanitizer box helps to safely clean your most frequently touched products, like your cell phone, keys and wallet. You can clean multiple products at once, too — even baby bottles and toys.

The box is friendly for small spaces and easily fits on a book shelf or coffee table.

​Buy it:​ Amazon.com; ​Price:​ $99.99