Electrolytes are minerals that carry an electrical charge when dissolved in your body’s fluids. The major ones — sodium, potassium, magnesium, chloride, calcium, phosphate, and bicarbonate — regulate everything from fluid balance and nerve signalling to muscle contraction, blood pressure, and pH balance.
Without them, your cells cannot communicate, your muscles cannot contract, and your brain cannot function properly. The StatPearls reference on electrolytes describes them as essential to virtually every physiological process in the body.
Sodium, potassium, and magnesium are the three most commonly supplemented electrolytes because they are the ones you lose fastest through sweat, exercise, heat, and the kind of modern diet that tends to be high in sodium but low in potassium and magnesium.
In a warm Mediterranean climate like Cyprus, where summer temperatures regularly reach 35–40°C, you lose electrolytes through sweat at a rate most people underestimate. Drinking plain water alone does not replace them — it can actually dilute the electrolytes you have left.
Electrolyte supplementation has moved well beyond the sports world. It is now a recognised part of daily health routines for people focused on longevity, cognitive performance, metabolic health, and cardiovascular function. The question is not whether you need electrolytes — you do. The question is whether you are getting enough, in the right forms, without the sugar and fillers that most commercial products load in.
Electrolyte balance touches nearly every domain that matters for healthy aging: cardiovascular health, blood pressure regulation, cognitive function, muscle preservation, and metabolic resilience. When any of these minerals drops even slightly below optimal, the effects compound over time.
Dr. Andrew Huberman, neuroscientist at Stanford University, has explained on his podcast that sodium, potassium, and magnesium are required for the basic electrical signalling between neurons — the action potentials that underpin everything from thought to movement. This is not a minor biochemical footnote. Cognitive decline in aging is partly driven by deteriorating neural communication, and maintaining proper electrolyte levels is one of the simplest ways to support that process.
Dr. Peter Attia, physician and longevity expert, takes an equally deliberate approach. As he discussed on his podcast: "Anytime I’m not drinking [plain] water, there’s really a purpose that I’m trying to serve in terms of glucose and/or electrolyte replacement and improving hydration status and water absorption." For Attia, electrolytes are not an afterthought — they are a purposeful part of his daily health practice.
Bryan Johnson, entrepreneur and creator of the Blueprint longevity protocol, goes further. On his Blueprint protocol page, he states: "All liquid I drink is mineralized, meaning it’s tea or with electrolytes or the Blueprint Longevity Mix in the am." Johnson has also shared on X his sauna electrolyte protocol — consuming 350 mg of sodium, 80 mg of potassium, and 24 mg of magnesium before and after each session to replace measured sweat losses. This is data-driven electrolyte management, not guesswork.
The cardiovascular evidence is particularly strong. A meta-analysis in JACC found that higher potassium intake was associated with a 21% lower risk of stroke. A review in Advances in Nutrition found that the sodium-to-potassium ratio is more strongly associated with blood pressure outcomes than either mineral alone — meaning that getting enough potassium alongside your sodium intake may be more important than simply cutting salt.
Dehydration — which proper electrolyte balance helps prevent — also has measurable cognitive costs. A meta-analysis on dehydration published in Medicine & Science in Sports & Exercise found that losing just 2% of body mass in fluid significantly impairs attention, executive function, and motor coordination. In a warm climate like Cyprus, that level of dehydration can happen in a single morning outdoors without adequate fluid and electrolyte intake.
As people age, the body’s thirst mechanism becomes less reliable. You feel less thirsty even when you need more fluid. This makes deliberate, daily electrolyte intake more important with every passing decade — not less.
The evidence for electrolyte supplementation is not based on a single study. It is built from individual mineral research across dozens of meta-analyses and systematic reviews.
A BMJ meta-analysis reviewing 22 RCTs and 11 cohort studies found that increased potassium intake reduces blood pressure in people with hypertension, with no adverse effect on blood lipids, catecholamines, or renal function. Higher potassium intake was associated with a 24% lower risk of stroke. A separate JACC meta-analysis confirmed a 21% reduction in stroke risk with an increase of 1.64 g/day of potassium.
A Na:K ratio meta-analysis confirmed that the ratio of sodium to potassium in the body is positively associated with blood pressure — and that this ratio is a more reliable indicator than either mineral in isolation. A Nutrients review summarising multiple meta-analyses reached the same conclusion: the balance between these two minerals matters more than absolute intake of either one.
A meta-analysis in Hypertension covering 34 double-blind, placebo-controlled RCTs found a causal effect of magnesium supplementation on lowering blood pressure. A 2024 umbrella meta-analysis confirmed these findings, showing consistent blood pressure reductions particularly at doses of 400 mg/day or more for at least 12 weeks.
A BMJ sodium meta-analysis confirmed a clear dose-response relationship between sodium reduction and blood pressure improvement, with a mean systolic blood pressure reduction of 4.26 mmHg. However, the picture is not as simple as "sodium is bad." Most healthy, active people — especially those in warm climates — need adequate sodium to function. The danger is excess sodium without enough potassium, not sodium itself.
Glucose does enhance sodium absorption in the gut via the SGLT1 co-transporter, which is why the WHO’s Oral Rehydration Solution contains sugar. But for daily use — not acute diarrheal illness or ultra-endurance sport — sugar is unnecessary. A crossover study in recreationally active adults found that a sugar-free electrolyte beverage maintained comparable hydration markers and 5-km running performance to a conventional carbohydrate-electrolyte sports drink. For everyday health, you get the electrolytes without the metabolic downsides.
Not all electrolyte products are the same, and the form of each mineral matters.
As Huberman noted on his podcast: "It has salt, magnesium and potassium, so-called electrolytes which are critical for neuronal function and a lot of other biological functions." The combination of sodium, potassium, and magnesium — without sugar — is the formulation that Huberman himself uses and has described his routine around: one packet containing 1,000 mg sodium, 200 mg potassium, and 60 mg magnesium, mixed in water.
Sodium chloride is the standard, effective form of sodium. There is no need for exotic sodium sources — plain sodium chloride is well absorbed and does exactly what it needs to do.
Potassium citrate is the preferred supplemental form for daily use. A clinical bioavailability study confirmed that potassium citrate has equivalent bioavailability to potassium chloride — meaning your body absorbs the same amount of potassium from either form. But citrate has an additional advantage: it acts as a bicarbonate precursor, providing an alkaline load that may support acid-base balance, bone health, and kidney stone prevention. A review on potassium forms notes that dietary potassium naturally occurs in alkaline forms like citrate — making it the more physiologically aligned choice for daily supplementation. Potassium chloride, by contrast, provides a higher acid load and is primarily used in clinical settings for acute deficiency correction.
Magnesium in a combined electrolyte product is typically a small, supplementary dose — often around 60 mg. At this level, most well-absorbed forms work fine: magnesium citrate, malate, or glycinate are all good options. Avoid products that use magnesium oxide, which has poor bioavailability. Keep in mind that a small dose of magnesium in an electrolyte mix is not meant to replace a dedicated magnesium supplement — it is there to complement the sodium and potassium.
A daily electrolyte should contain zero added sugar, glucose, dextrose, or maltodextrin. Sugar is useful in an Oral Rehydration Solution for acute illness, but for daily hydration and health, it is unnecessary caloric load that works against metabolic goals.
If the ingredient list is longer than the list of functional minerals, something is wrong.
As Huberman shared on his podcast: "I typically drink Element first thing in the morning when I wake up in order to hydrate my body and make sure I have enough electrolytes." This morning-first approach makes physiological sense — you wake up after 7–8 hours of breathing and sweating without any fluid intake.
A typical well-formulated electrolyte serving provides approximately 1,000 mg of sodium, 200 mg of potassium, and 60 mg of magnesium. For most healthy adults, one to two servings per day is appropriate depending on activity level, climate, and diet. In the Cyprus summer, when temperatures push above 35°C, you may need the higher end of that range — especially on days involving outdoor activity or exercise.
For context, the WHO guideline recommends at least 3,510 mg of potassium per day for adults, and most people fall significantly short. The NIH fact sheet confirms that the adequate intake for potassium is 2,600 mg/day for women and 3,400 mg/day for men. A single electrolyte serving does not replace dietary potassium but helps close the gap — particularly when combined with potassium-rich foods.
Sodium needs vary more significantly. Active individuals in warm climates may need 3–5 g of sodium per day, while less active individuals or those with hypertension may need considerably less. The important thing is not to fear sodium but to match your intake to your activity, climate, and health status — and to balance it with adequate potassium.
This is a daily supplement, not an as-needed sports product. Consistent daily use produces the best results.
The simplest approach is to start the morning with one serving of electrolytes mixed in water. This is what Huberman does, and it addresses the overnight dehydration that everyone wakes up with. Drink it before breakfast, before coffee, before anything else.
If you exercise, take a second serving before or during training. In the Cyprus summer, where outdoor workouts or even a walk at midday can produce heavy sweating, this becomes especially important.
If you fast or eat on a time-restricted schedule, electrolytes are particularly valuable. When insulin levels are low — as they are during fasting — the kidneys excrete more sodium. Peter Attia has stated on the Tim Ferriss Show that he supplements with sodium and magnesium during fasting periods to offset this loss. If you practice intermittent fasting or time-restricted eating, an electrolyte serving during your fasting window can reduce fatigue, headaches, and the lightheadedness that many people attribute to hunger but is often just sodium depletion.
If you eat low-carb or keto, the same mechanism applies. Lower carbohydrate intake means lower insulin, which means your kidneys flush more sodium. Electrolyte supplementation is not optional on these diets — it is a practical necessity.
For older adults, the declining thirst mechanism makes deliberate electrolyte intake more important. You cannot rely on feeling thirsty to know when you are dehydrated. A scheduled morning serving is a simple, effective safeguard.
For travellers, air travel is dehydrating. A serving before and after a flight helps maintain hydration, especially on the 4–5 hour flights common from Cyprus to northern Europe.
Bryan Johnson takes a more structured approach — on his Blueprint protocol, he mineralises all liquid he drinks throughout the day and stops all fluid intake by 4 pm to protect sleep quality. You do not need to be that precise, but the principle is sound: make electrolytes part of your daily fluid intake, not an occasional add-on.
The electrolyte market is full of products that look good on the shelf but deliver very little of what you actually need. Here is what to watch for when shopping in Cyprus.
Gatorade, Powerade, and most pharmacy-brand electrolyte drinks contain 20–35 g of added sugar per serving. They were designed for elite athletes burning thousands of calories during competition. For daily use, they are essentially sugar water with a small amount of sodium. They undermine the very health goals you are trying to support.
These are popular in Cyprus pharmacies and convenient to use, but check the label carefully. Many contain very low mineral content per tablet — sometimes as little as 50–100 mg of sodium — along with sugar or artificial sweeteners as the primary ingredients. The fizz is not evidence of quality.
Any product that lists an "electrolyte blend" without disclosing the exact milligram amount of each mineral per serving is hiding something — usually the fact that the doses are too low to matter.
Cheaper products use potassium chloride. While it is absorbed similarly, it lacks the alkalinising benefits of citrate and may cause more gastrointestinal irritation. If the label just says "potassium" without specifying the form, it is almost certainly chloride.
Some products include magnesium oxide, which has roughly 4% absorption. If the product contains 60 mg of magnesium as magnesium oxide, you are absorbing approximately 2.4 mg. That is not meaningful supplementation.
These are primarily carbohydrate delivery systems designed to fuel endurance performance. They are not focused electrolyte supplements and are a poor choice for daily electrolyte maintenance.
Some brands sell standalone potassium supplements at very low doses — often 99 mg, the US over-the-counter limit — at inflated prices. A combined electrolyte product with meaningful doses of all three key minerals is more practical and more cost-effective.
Electrolyte supplementation is safe and well tolerated for the vast majority of healthy adults with normal kidney function. But there are specific groups who need to exercise caution.
In healthy people with normal kidney function, there is no evidence that standard-dose potassium supplementation causes hyperkalemia or adverse effects. However, potassium supplementation can be dangerous for people with impaired kidney function (eGFR below 60 mL/min), as the kidneys may not be able to excrete excess potassium efficiently. Hyperkalemia — elevated blood potassium — is a serious condition that can cause cardiac arrhythmias.
People taking RAAS inhibitors — including ACE inhibitors such as enalapril or lisinopril, ARBs such as losartan or valsartan, and aldosterone antagonists such as spironolactone — are at increased risk of hyperkalemia when supplementing potassium. A clinical review in the Cleveland Clinic Journal of Medicine details this interaction. If you take any of these medications, consult your doctor before adding a potassium-containing electrolyte to your routine.
People with diabetes mellitus or anyone with baseline serum potassium above 5.0 mEq/L should also seek medical advice before supplementing potassium.
Excess sodium intake raises blood pressure and cardiovascular risk, particularly in salt-sensitive individuals. A BMJ meta-analysis confirmed a dose-response relationship between sodium intake and blood pressure. People with hypertension, heart failure, kidney disease, or liver disease should consult a healthcare professional before increasing sodium intake. For healthy, active individuals — especially in warm climates — adequate sodium is necessary and beneficial. The risk is not sodium itself, but too much sodium without enough potassium.
High-dose magnesium supplementation can cause diarrhoea, nausea, and abdominal cramping. However, the small dose in a typical electrolyte mix — around 60 mg — is well below the threshold for these effects. People with severely impaired kidney function should be cautious with any magnesium supplementation.
Pregnant or breastfeeding individuals should consult a healthcare professional before using electrolyte supplements. People taking blood pressure medications, diuretics, or heart medications should consult their doctor, as these medications directly affect electrolyte balance. Electrolyte supplements are not a substitute for medical treatment of diagnosed electrolyte imbalances.
This content is for educational and informational purposes only and does not constitute medical advice. Supplements are not intended to replace a balanced diet and healthy lifestyle. Results and suitability vary by individual. If you are pregnant, breastfeeding, taking medication, or managing a medical condition, consult a qualified healthcare professional before use.
Most electrolyte products available in Cyprus pharmacies and supplement shops fall into two categories: sugar-loaded sports drinks or low-dose effervescent tablets. Neither is suitable for a daily, health-focused electrolyte routine.
What you want is straightforward: a clean formula with meaningful doses of sodium chloride, potassium citrate, and magnesium — with no sugar, no artificial colours, and no unnecessary fillers. The label should tell you exactly how many milligrams of each mineral you are getting per serving. If it does not, move on.
Longevity.cy sells a sugar-free electrolyte formula built on exactly these principles:
This is the same formulation principle used by leading longevity researchers and practitioners: sodium, potassium, and magnesium in the right forms, without the sugar that most commercial products rely on for taste.
Longevity.cy delivers across Cyprus. If you have been drinking plain water in the Cyprus heat and wondering why you still feel tired, sluggish, or mentally foggy — your electrolyte intake is the first thing worth checking.
