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Electrolytes 101: What Are They and Why Do We Need Them?

13th March 2025

Health Nutrition

13th March 2025

By Shivraj Bassi

Electrolytes. You’ve seen the word plastered across sports drinks, hydration tablets, and wellness blogs. You know they have something to do with hydration and performance. But do you really need them? Or is this just another overhyped wellness buzzword?

Let’s look at what electrolytes are, the benefits they offer and why not all electrolyte supplements are created equal. 

What are electrolytes?

The answer to this question is quite simple – but the way they work is not. 

Electrolytes are essentially minerals which carry an electric charge (not a scary one) when dissolved in water1. They’re like your body’s spark plugs, helping things kick into gear as they should. 

The main electrolytes include:

  • Sodium – works to regulate blood pressure and fluid balance.
  • Potassium – supports nerves and muscles to do their job.
  • Magnesium -  helps your cells turn nutrients into energy.
  • Calcium – crucial for muscle contraction.
  • Chloride, phosphate and bicarbonate – work together to regulate fluid and pH balance.

You can find these electrolytes in the foods you eat (leafy greens, yoghurt and bananas are great picks), the fluids you drink, or the supplements you enjoy. 

Why do we need electrolytes?

Without electrolytes, you literally can’t function. It’s that simple. They’re a critical part of proper nutrition. 

You could have all the water in the world but it doesn’t mean much if you don’t have electrolytes, too. Too much water without electrolytes can actually cause an imbalance in the body, which can lead to water intoxication – basically where the sodium in your blood is too diluted. This can be very dangerous. 

For most of us in our day-to-day lives, the benefits of electrolytes are less about survival and more about optimal performance. Staying adequately topped up on electrolytes helps the water get to where it’s needed in your body, supports your muscles through contraction and relaxation in every move you make, transmits nervous system signals between your brain and body, and keeps your pH in the Goldilocks zone (not too acidic, not too alkaline)2. 

Cramp, dizziness, brain fog – all of these things can be explained by an electrolyte imbalance. 

Water vs electrolytes: what is hydration?

‘Drink more water’ is usually most people’s answer to any question about why you’re not feeling great. We don’t disagree with the intention but the execution could use some work. 

Water is crucial. Hydration is crucial. But water ≠ hydration. Water is a big part of it, but the real equation is water + electrolytes = hydration. Without electrolytes, the water can’t get where it needs to be in the body, and you’ll be missing out on all the different fuels it needs. 

When you sweat, you’re not just losing water, you’re losing electrolytes too3. Try chugging a bottle of water after a tough workout, you’ll probably feel bloated and flat. Then, try adding electrolytes into the mix and we’re willing to bet you’ll feel a whole lot better. 

Think of it like charging your phone. You can plug it in (the water) but if you don’t turn on the power (electrolytes), you’re not really getting anything. 

Why most electrolyte drinks don’t cut it

With all this newfound knowledge, you’re probably eager to grab a convenient electrolyte drink from the shop after your next workout – but maybe you should hold off for a minute. Let us elaborate.

Stop by any store or gym vending machine and you’ll see countless colourful electrolyte drink options, but are they really giving you what you need? They might contain electrolytes, sure, but in reality they’re just glorified sugar water.

Some electrolyte drinks contain almost as much sugar as a can of [insert soda brand here]4, which spikes your blood sugar and leads to crashes later in the day. They’re also rammed with artificial flavours and colours (you didn’t think that neon orange drink was natural, did you?), as well as unbalanced electrolyte profiles. 

They might make you feel sporty, but they don’t give you what you really need after a gruelling workout.

A smarter way to hydrate – electrolyte supplements

In order to properly replenish your body, you need a balanced, unadulterated electrolyte supplement. We were tired of searching the shelves for something which gave us exactly that, so we decided to make one ourselves.

Innermost’s The Hydrate Blend is an all-in-one solution for optimal hydration, energy and performance. It’s perfectly balanced with a complete electrolyte spectrum and enhanced with extra vitamins and minerals to work just as hard as you do. 

Available in Lemon and Mint, Elderberry or Orange flavours, simply add one sachet into 500ml of cold water and shake (or stir, whatever floats your boat). In seconds you’ve got a clean, hydrating and delicious electrolyte drink to keep you going all day. 

Cut the faff, get what you need – nothing else. 

Final sip – the benefits of electrolytes

Sodium, magnesium, calcium, chloride – electrolytes can sound complicated, but they really aren’t. However scientific you get with it, the end point is they help your body run smoothly. Without them, you’re fighting a losing battle. 

Next time you reach for that bottle of water after a workout, throw a sachet of The Hydrate Blend in first and your body will thank you for it. Remember, water can’t do anything if there’s nothing there to help absorb it. 

Here’s to balance, hydration and energy. Cheers!

References

1.    Electrolytes, Cleveland Clinic, September 2021. Click here.

2.    Shrimanker I, Bhattarai S. Electrolytes. [Updated 2023 Jul 24]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Click here.

3.    Giraldo Cardona, L, What are electrolytes and why do I need them?, Bupa, Aug 2025. Click here.

4.    Sports Drinks, The Nutrition Source, May 2025. Click here. 

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In the past few years, collagen has gone from a niche beauty buzzword to one of the most searched-for supplements available. Walk down any health aisle and you'll find it in powders, capsules, sachets and even coffee blends.  Marine collagen has become a particular favourite, often praised for its hydrolysed peptide format and its links to healthier-looking skin. But how much of that holds up once you look at the science? And is a marine collagen supplement worth adding to your routine? This guide covers what marine collagen is, the benefits, how it works, and what the research shows. No miracle promises. Just a clear, honest look at where collagen fits into your modern wellness routine. Let’s get into it! Key takeaways Marine collagen is a hydrolysed protein sourced from fish skin and scales, made up almost entirely of Type I collagen - the type most abundant in human skin. 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Marine collagen vs bovine collagen Marine and bovine collagen are two of the most common forms of collagen supplements that you will hear about: Marine collagen is sourced from fish, usually the skin and scales Bovine collagen comes from cattle, most often the hide. Both are commonly hydrolysed into collagen peptides, which means they have been broken down into smaller fragments that are easier for the body to digest and use. The main difference is usually the collagen profile. Marine collagen is typically rich in Type I collagen, the type most strongly associated with skin, bones and connective tissue. Bovine collagen usually contains both Type I and Type III collagen, giving it a slightly broader collagen profile. That does not make one automatically better than the other. Marine collagen may be more appealing if your focus is skin support or you prefer a fish-derived source, while bovine collagen may suit those looking for a wider mix of collagen types. In both cases, the quality of the supplement matters more than the source alone. Look for hydrolysed peptides, a clear dose, transparent sourcing and a format you can use consistently. Feature Marine collagen Bovine collagen Source Fish or other marine sources, often skin, scales or bones Cattle, usually hides or bones Common collagen types Mainly Type I collagen Type I and Type III collagen Often chosen for Skin hydration, elasticity and beauty-focused routines General collagen support, including skin and connective tissue Digestibility Usually hydrolysed into collagen peptides for easier digestion and mixing Also commonly hydrolysed into collagen peptides Taste and texture Can have a mild marine taste if not well formulated Usually more neutral, though this depends on the product Dietary considerations Not suitable for fish allergies, vegans or vegetarians Not suitable for people avoiding beef, vegans or vegetarians Main thing to check Source, collagen dose, peptide format and taste Source, collagen dose, peptide format and quality Is marine collagen worth taking?  For most people interested in skin health, marine collagen is a reasonable, low-risk supplement to try, as long as your expectations are realistic. The evidence for gradual gains in skin hydration and elasticity is reasonably solid. The case for hair, nails and joints is softer, but it's building. It also works best as one piece of a bigger picture and should be consumed alongside a protein-rich, varied diet, decent sleep, sun protection and staying hydrated. If you do give it a go, choose a hydrolysed product with a sensible dose and supporting nutrients like vitamin C, commit to a consistent 8 to 12 weeks, and judge the results for yourself. Whatever source you land on, quality and consistency are what turn a supplement from a hopeful purchase into a habit worth keeping. That is the standard we hold every formula to at Innermost: science over hype, quality ingredients and nothing you do not need. Whether you are looking at collagen, protein or everyday wellness support, the same rule applies: choose what fits your body, your goals and the routine you can actually stick to. If you're not sure where to start, our free nutritionist consultation can help you work out what actually fits your goals. Frequently asked questions  Is marine collagen better than bovine collagen?  Neither is outright better. Marine is primarily Type I and may appeal to those looking for a fish-derived source, while bovine offers Types I and III and is often cheaper. Can vegans take marine collagen?  Marine collagen comes from fish, so it isn't suitable for vegans or vegetarians. Vegan "collagen support" products work differently, supplying nutrients such as vitamin C that contribute to normal collagen formation rather than collagen itself. Does marine collagen taste fishy?  A good-quality hydrolysed marine collagen should be virtually flavourless. A noticeable fishy taste is usually a sign of a lower-quality product. How much Marine Collagen should I take? Most research points to an effective daily intake of somewhere between 2.5g and 15g of collagen peptides, with many of the skin studies sitting in the middle of that range. References Czajka, A., Kania, E., Genovese, L., Corbo, A., Merone, G., Luci, C., Sibilla, S., Siciliano, C. (2018). Daily oral supplementation with collagen peptides combined with vitamins and other bioactive compounds improves skin elasticity and has a beneficial effect on joint and general wellbeing. Nutr Res. 57. Click here. Farooq, S., Ahmad, M., Zheng, S., Ali, U., Li, Y., Shixiu, C., Zhang, H. (2024). A review on marine collagen: sources, extraction methods, colloids properties, and food applications. Collagen Leather. 6(11). Click here. Myung, S., Kim, J., Lee, Y., Choi, Y. (2025). Effects of collagen supplements on skin aging. Am J Med. Click here. Pu, S., Huang, Y., Pu, C., Kang, Y., Hoang, K., Chen, K., Chen, C. (2023). Effects of oral collagen for skin anti-aging: a systematic review and meta-analysis. Nutrients. 15(9). Click here Evans, M., Lewis, E., Zakaria, N., Pelipyagina, T., Guthrie, N. (2021). A randomized, triple-blind, placebo-controlled, parallel study to evaluate the efficacy of a freshwater marine collagen on skin wrinkles and elasticity. J Cosmet Dermatol. 20(3), 825–834. Click here. Hexsel, D., Zague, V., Schunck, M., Siega, C., Camozzato, F., Oesser, S. (2017). Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails. J Cosmet Dermatol. 16(4), 520–526. Click here. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). (2010). Scientific Opinion on the substantiation of health claims related to biotin. EFSA Journal. 8(10), 1728. Click here.
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