
Water is essential for life – most of us know that our body is made up of approximately 70% water but do we drink enough water?
As we are heading into summer, here in Melbourne (hopefully), this is a good time to check if your water intake is adequate. I will explain a bit later, how to find out exactly how much water you need.
Water is not only essential for life, it is essential for maintaining a state of optimal health.
Despite this, many of us are not aware whether our own water intake is optimal or leading us towards dehydration and other health issues. I can answer this question for you and give you some tips to keep you hydrated.
Firstly, why do we need water?
Water is essential for survival but also reaching optimal health, dehydration can result in some significant health effects, including:
- Increased risk of kidney stones
- Urinary tract cancers
- Colon cancer
- Mitral valve prolapse which can result in a heart murmur
- Decreased physical and mental performance
- Salivary dysfunction (saliva is needed for oral health and good digestion as it contains digestive enzymes)
- Dehydration reduces the thirst mechanism which leads to long-term dehydration and affects kidney function particularly in the elderly. Long-term dehydration in the elderly can affect cognitive function, cause constipation, falls and stroke.
Adequate water intake can improve these conditions:
- Headaches
- Constipation
- Skin health
- Chronic fatigue syndrome
- Obesity
- Kidney stones/lowered kidney function
- High blood pressure
Let’s take a look at what to count as water intake:
Water intake occurs in two main ways from drinking water and from eating food.
We get the most of our water from drinking plain water.
Often it’s assumed that water from caffeinated beverages counts towards your daily water intake but due to the caffeine causing a diuretic effect (increased urine output), we do not include caffeinated beverages in your daily water intake. This includes coffee, caffeine containing teas, cola drinks and energy drinks (cola and energy drinks are high in sugar so not beverages that should be consumed as part of a balanced diet!).
We also get some water from our food, only around 10-20% of the water in our food is able to be used by the body for hydration so majority of our water intake must come from drinking it.
Let’s take a look at how much you need to drink each day:
There are two ways to figure out how much water we need to drink. You can either use this equation which is based on an individuals weight or you can follow the nutrient reference values, which is based on age and gender.
1. The equation based on your weight is:
33mLs x (body weight in kg) = our water requirements in mLs
For example, a person weighing 60kg requires: 33mLs x60kg = 1980mL (1.98L)
Some people require higher amounts due to exercise, a labour intensive job or living in a hot climate. Basically, the more you sweat and/or urinate, the more water you will require. To account for this, work out your daily requirement based on weight and then ensure you are drinking extra water regularly.
2. The nutrient reference values can be found here.
For children, only use the nutrient reference values which in summary are:
1-3 yr old – 1L/day (includes any milk)*
4-8 yr old – 1.6L/day (includes any milk)*
9-13 yr old- 1.4L/day (girls); 1.6L/day (boys)
14-18 yr old – 1.6L/day (girls); 1.9L/day (boys)
Children and adolescents who are very active, will need to drink more than the recommended amounts, this depends on the child and how active they are but ensure they are drinking water regularly.
*The requirements for children aged between 1 and 8 years old does include water from milk however 1 cup of milk doesn’t equate to 1 cup of water. Encourage your child to drinking plain water regularly and keep an eye on how much they are drinking to ensure they are not drinking too little or too much.
Tips to keep you hydrated:
- Add a fresh quarter of lemon or lime to your water or mineral/soda water
- Get a stainless steel (avoid aluminium) drink bottle and sip on water regularly, take it with you everywhere. Also, by drinking from a drink bottle you know how much you’ve been drinking through the day.
- Slow down and sip! Sip on water throughout the day, it’s best to avoid drinking water very fast or drinking large amounts at once.
- Drink water after food not before, if you drink water prior to eating or during a meal, it will dilute your stomach acid and reduce your capacity to digest your food properly.
- Download an app on your smartphone to help you keep a track of your water intake some examples are:
- Daily water free- water reminder and counter (iPhone)
- Water logged (iPhone)
- Water drink reminder (Android)
- Drink Water (Android)
With the apps mentioned, you can enter in the amount you need to drink per day manually.
It’s particularly important on very hot days to ensure you are drinking more than the recommended amount for you. Avoiding dehydration will help keep your health on track.
Enjoy this summer and stay hydrated!
Thanks for reading,
Erin.
