Everyone knows the importance of drinking water daily, whether it’s from a tap or a bottle.

Walk down any store aisle, though, and you’ll find a dizzying array of options—spring, purified, sparkling, and more. So what sets them apart? Whether you’re looking for added minerals, extra filtration, or just a refreshing fizz, here’s a breakdown of eight common types and their potential benefits.

Alkaline

Featuring higher pH levels than regular water, those containing alkaline are believed to help neutralize acidity in the body. While some proponents argue that this aids in fighting aging and disease, there’s limited research to support these claims. In fact, too much alkaline water could impact your gut health and immune system for the worse. Also, it’s important to avoid it if you’re on any type of medication, prescribed or over-the-counter, since mixing them could lead to a negative reaction.

Distilled

This option is created through boiling water to make steam, which is then collected and condensed back into liquid form. The process removes virtually everything, including bad contaminants and good minerals. The former makes it ideal for medical purposes, such as for use in humidifiers and nasal irrigators, but the latter means that it is not great for drinking unless absolutely necessary. Not that you may want to anyway—distillation leads to very flat water stripped of any flavor.

Hydrogen

Because this product is infused with molecular hydrogen gas, it is thought to contain antioxidant properties and improve athletic performance by reducing inflammation and increasing energy. However, more research is needed to confirm such assertions since hydrogen water is a relatively new addition to the marketplace.

Mineral

As the name suggests, mineral water is filled with a variety of naturally occurring elements. These include calcium, magnesium, and sodium, which can support bone and heart health, lower blood pressure, and improve digestion. Just note that because it is taken directly from underground sources, it often comes with a higher price tag.

Purified

Purified water goes through an extensive filtration process, such as deionization or reverse osmosis, to remove bacteria, chemicals, and heavy metals. This makes it one of the cleanest options available, but it can also strip away valuable minerals, like with distilled water. Some brands do add them back for taste and health benefits, though, so be sure to check the label to see what all a bottle may include.

Sparkling

This version is infused with carbon dioxide to create its signature fizz. Combine that with the wide variety of flavors available, and you’ve got a refreshing alternative to sugary sodas. However, because many products contain artificial flavors and added sugar and sodium, it’s important to carefully review the ingredients list and nutritional value. And like with other carbonated beverages, aim to limit the amount you consume since too much could negatively impact your digestion.

Spring and glacier

Similar to mineral water, these are typically bottled at the source—either a natural spring or glacier. They’re generally clear of potential contaminants and contain many of the same elements found in mineral water, including calcium and magnesium. That said, not all brands are created equal since some don’t test the liquid before putting it on shelves. When shopping, it’s best to opt for well-known ones like Mountain Valley and Evian, even if they do tend to be more expensive.

Tap

Because it is easily accessible, tap water is the most common type of drinking water. Public tap water is regulated by the EPA, but the quality and taste can vary by location and depend on the source, such as if it comes from a lake, river, or well. Adding a simple filtration system to your kitchen faucet, fridge, or pitcher can help remove contaminants and improve flavor.

No matter your choice of water, one thing is certain—staying hydrated is key to good health. So the next time you grab a bottle or turn on the tap, consider what’s in your glass and how it benefits you.