REVIEW: Nuun Active Hydration Tablets

A few months ago I went to a runners info night put on by Women’s Running Magazine. It was hugely informative, and one of the few things I purchased afterwards was a tube of nuun hydration tablets.


In the heat of summer I started running with a handheld drink bottle so that I could sip away at water on my longer runs. I first tried out the Pink Lemonade nuun hydration tablets when on a gorgeous run along the Thames River Path with Charlie, and then again on the Team Naturally Run Sunday jaunt along the Parkland Walk. Both times I liked having a little extra something in my water – even if the pink lemonade flavour did feel a bit fizzy and make me burp!


Since those runs, nuun has found a special place in my runners cupboard! I’ve become a massive fan, and own so many different flavours – lemon and lime, tri berry and grape are my current favourites (but I’m also partial to tropical, banana, and kona cola too!).

Other than the great light and refreshing taste, popping a nuun tablet into your water turns it into a balanced electrolyte drink. I personally prefer it over other sports drinks which are filled with sugar – nuun is sugar free, has no carbs or added energy (except for a couple of new flavours which have clearly marked caffeine added to them) and is less than 6 calories. They are not an energy replacement at all – which means that you can manage your own energy needs throughout your activity like you normally would with gels or bars etc.


Nuun tablets are quickly dissolvable, and quickly absorbed too meaning you rehydrate faster. Apparently adding flavour and electrolytes to water can up your intake by 90% vs plain water as it fuels the subconscious drive to drink. They are lightly flavoured (rather than strong) because when you’re being physically active, your tastebuds are more sensitive than when at rest – I found this quite fascinating!


I find that having a nuun tablet before I head out for a long run provides me with good pre-hydration (sometimes I have had headaches after running, and making sure I am properly hydrated BEFORE seems to help hugely!). My handheld water bottle (500ml) has become a staple in my race wardrobe – being able to sip on nuun every kilometre has the benefit of keeping me hydrated, AND means I can breeze past water stations and not waste time trying to sip from cups or open bottles.

Royal Parks Half Marathon

Tri-Berry nuun to match my outfit at Royal Parks Half

After Royal Parks Half, Jase had a nuun tablet already dissolved in a fresh bottle of water for me to slug back as soon as I crossed the finish line. It 100% helped me with less cramping and fatigue because my body was quickly rehydrated after a race on a hot morning.

Nuun are also AWESOME for a hangover. Not that I’ve tried it or anything…you know, just saying. 😉

One small issue I have found is that the tablets do have a slight fizziness to them, and if you are running and shaking up your water bottle – then be aware of how you open your bottle for the first few sips. I’ve had nuun explode into my mouth by opening my bottle with my teeth, and during Royal Parks Half I completely sprayed nuun up my tee and over my hand! I tried running with the bottle open, but my fingers ended up going a bit wrinkly-wet from the constant drips haha!

human race 6

Nuun comes with me on all long runs now – and helped me through my sluggish Whole Foods Market Womens Only 15k Race

The only other slight problem I’ve found with nuun is that Jase has taken a massive shine to them. My collection of flavours suddenly halved…and I’ve caught him in the act of having one a day when he is off to the gym! I’ve had to hide a tube or two – knowing my luck, I’ll go to get a tab for my next race and will find an empty tube sitting in the cupboard!

Have you tried nuun yet? What kind of hydration do you use for exercise? LUCKY YOU – if you use the code NATURALLYLEAH at the checkout on you will receive 25% off!

While I am (now) a nuun ambassador, my first nuun purchase and trial was all my own. Since then, nuun has supplied me with new flavours to trial. All fangirl ravings about nuun are my own.


  1. Lucy November 18, 2013 / 8:51 pm

    I wish I liked nuun, I hear so many good things about it, but I just think it tastes disgusting! I tried loads of flavours at the Om Yoga Show, but just thought they were all foul! I feel like I’m missing out 🙁

    • Leah November 19, 2013 / 2:34 pm

      Hmmm, that’s weird…maybe you should try it while you are exercising to see whether that changes your mind? I admit at first taste that it’s quite weak and watery – but when I am out running, I don’t notice it at all. Coz you are totally missing out, they are actually my favourite thing ever!

      • Bgardner June 19, 2016 / 7:25 am

        No she is not missing anything. They taste horrible and choke me while trying to workout. Come on you can’t tell me it’s an acquired taste like beer drinkers…it’s awful! And it doesn’t dissolve well. Tell the truth to the consumers because they are going to figure it out!

        • Leah June 23, 2016 / 4:37 pm

          Sorry you don’t like them Bgardner – they are still one of my favourite items! I trained for both my marathons using them, and even took them backpacking and hiking on The Inca Trail and to The Lost City. I feel that that IS “telling the truth to consumers” as I wouldn’t recommend a product that I haven’t tried, and loved. Thanks for your opinion though – I am sure you aren’t the only one who doesn’t like them either!

        • Keith June 7, 2017 / 12:39 am

          I have no problem with nuun .They disolve quickly and i have found i m not as sore or tired after a 4 hr workout. Love them for all day bike rides.

  2. Tess @ FitBits November 19, 2013 / 11:31 am

    I tried nuun for the first time at the London Duathlon, and ran my best race ever – I keep meaning to buy some for training, especially as I’m starting marathon training, will your discount still be available after 25th?
    Tess @ FitBits recently posted..Brighton Brooks 10k – how I learned to run fasterMy Profile

    • Leah November 19, 2013 / 2:27 pm

      Best race ever AND hydrated by nuun?! That’s saying something 😉 Yes my code is valid indefinitely – so get amongst it!

    • Leah November 22, 2013 / 1:54 pm

      Yum – what was your favourite flavour?

  3. Lauren (@PoweredbyPB) November 20, 2013 / 1:39 pm

    I like Viridian’s sports electrolyte mix for shorter more intense workouts, and a mix of that and coconut water in my camelbak for long runs, definitely makes a huge difference.
    Lauren (@PoweredbyPB) recently posted..Taking it “easy”My Profile

    • Leah November 22, 2013 / 1:54 pm

      I think you don’t realise how MUCH of a difference this stuff makes until you try it. Before I started having nuun I was like, whats wrong with just drinking water when I get home – but now I really notice it when I do have nuun. Yum, love some coconut water too!

  4. Beki November 30, 2013 / 9:16 pm

    I love Zero 5 for hydrating during/after races as I’ve suffered from headaches in the past too, and have definitely found that adding them to my water has made a huge difference. But I would love to try nuun too- I’ve heard so much about it! 🙂
    Beki recently posted..What Are You Running From?My Profile

    • Leah December 13, 2013 / 11:14 am

      Oooh I haven’t tried Zero 5 – I think once I tried nuun I never went back. You should definitely give it a whirl, helps a lot with running headaches I have found too.

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