Drinking Plenty and Still Feeling Terrible?

Most of us have been there — a warm day, two litres dutifully consumed, and still that flat, foggy, crampy feeling that makes you wonder what on earth is going on. Here is what nobody tells you: hydration is not just about volume. It is about composition. As temperatures rise and you perspire more, your body doesn’t only lose water — it loses a finely tuned cocktail of minerals, and without replacing them, all that water can actually make things worse. I see this play out with clients again and again, and once they understand it, everything changes.

The Minerals Your Body Is Losing

Electrolytes are electrically charged minerals dissolved in your body fluids. They are not a wellness trend — they are essential to every heartbeat, nerve signal, and muscle contraction. The ones lost most heavily in sweat are:

•       Sodium — the gatekeeper of fluid balance. Without enough of it, cells cannot hold water properly. Drinking large volumes of plain water without sodium actually dilutes what little remains and that is when people start feeling genuinely unwell.

•       Potassium — works hand in hand with sodium. When it drops, you feel it: cramps, palpitations, the kind of bone-deep fatigue that makes a warm afternoon feel like wading through treacle.

•       Magnesium — the quiet workhorse behind over 300 processes in the body, including sleep, muscle relaxation, and energy production. Most people are already running low before summer arrives. In heat, it depletes faster, and the fallout: cramps, twitching, poor sleep, headaches, anxiety, is so common we’ve started to think it’s normal. It isn’t.

•       Calcium — pairs with magnesium to govern the balance between muscle tension and release, including in the heart.

Signs the Problem Might Be Electrolytes, Not Just Heat

•       Fatigue or brain fog despite drinking plenty

•       Muscle cramps or twitching, especially at night

•       Headaches, dizziness, or light-headedness

•       Heart fluttering or palpitations

•       Irritability or anxiety that worsens in warm weather

•       Feeling noticeably worse after a large drink of plain water

What You Can Do About It

1.    Salt your water. A small pinch of quality sea salt, Celtic grey salt, or Himalayan pink salt in your water bottle is one of the simplest and most effective things you can do. It provides sodium with other trace minerals and makes your water actually usable by your cells.

2.    Eat your potassium. Avocado, banana, sweet potato, leafy greens, coconut water — aim for these at every meal in warm weather. Coconut water diluted half and half with filtered water is one of nature’s best natural electrolyte drinks.

3.    Take magnesium seriously. Food sources help — pumpkin seeds, dark chocolate, almonds, spinach — but for most people, a magnesium glycinate supplement is genuinely worthwhile, particularly through summer.

4.    Understand what your cells actually want. This is where it gets genuinely fascinating. Researcher Gerald Pollack at the University of Washington discovered that water exists in a fourth phase — beyond solid, liquid, and vapour — called EZ water, or exclusion zone water. This structured, gel-like form of water is what your cells are lined with and what they prefer to use. It holds an electrical charge, like a biological battery, and supports cellular energy far more effectively than ordinary bulk water. EZ water forms naturally in the body when we are exposed to infrared light (sunlight, warmth), when we move, and when we eat water-rich whole foods like cucumber, celery, and watermelon. In summer, this is actually good news — gentle sun exposure, movement, and hydrating foods all help build the structured water your cells run on. It also explains why a glass of water alone never quite hits the spot the way a juicy peach or a bowl of berries does on a hot day.

5.    Explore hydrogen water. One of the more exciting developments in hydration research is molecular hydrogen — water infused with dissolved hydrogen gas (H₂). The emerging science is compelling: hydrogen is a selective antioxidant, meaning it targets the most damaging free radicals without interfering with beneficial ones. Studies suggest hydrogen water may reduce inflammation, support mitochondrial function, improve exercise recovery, and protect the brain from oxidative stress. For anyone dealing with fatigue, joint issues, or high training loads in the heat, this is well worth exploring. Hydrogen water tablets or a hydrogen generator are the most practical ways to access it.

6.    Drink between meals, little and often, not a lot at once. When you drink with food, you dilute your digestive power: both stomach acid as well as pancreatic juices. This may be critical for those who are stressed, have compromised digestive function or are chronically unwell for other reasons. Also, the kidneys can only process around 800ml per hour. Large volumes drunk quickly without electrolytes simply dilute your mineral status further — which is precisely why so many people feel worse, not better, after a big glass of water on a hot day.

The Bottom Line

Hydration is one of those things that sounds simple until you realise how much nuance is hiding inside it. Water matters — but the quality of that water, what you put in it, and the minerals you eat alongside it matter just as much. If you regularly feel flat, foggy, or drained in warm weather despite your best efforts, this is almost certainly part of the picture. And the good news is that the body responds remarkably quickly — most people notice a real shift within 24 to 48 hours of getting it right.

If you’d like to explore your individual electrolyte status or understand which water filtration and supplementation approach suits you best, get in touch — this is exactly the kind of thing functional nutrition can help untangle.

Ready to hydrate properly? Book a consultation at Body Mind Insights.