No matter where you are in Australia, you're subject to some extreme heat for the next three months (not you, Tasmania). You need to stay hydrated.

Nutrition is a battlefield where everyone seems to have an opinion. Some of those opinions are science-based, and others are veiled quackery with little evidence to back them up. It can be frustrating if you're simply trying to stay healthy. Do you spend $4 on the expensive water bottle or just drink it from the tap? Is the science behind a product's claims valid?

One oft-repeated advice for beating back dehydration is to drink eight glasses of water a day. Well, that's a myth. Some of us need more or less, and how much you need changes day to day. Also, water isn't your only option. You can stay hydrated from many foods, too.