Electrolytes
MineralSodium, potassium, magnesium, and chloride blend for hydration, nerve function, and muscle contraction. Important for athletes and low-carb dieters.
Evidence comparisons not yet run for these claims.
Expert Consensus
Evidence Summary
The available research on electrolytes spans several clinical and performance-related contexts, including exercise hydration, kidney disease management, pregnancy-related conditions, preterm infant nutrition, and neurological injury. Across these domains, electrolytes — such as sodium, potassium, calcium, and magnesium — are consistently recognized as critical for physiological function, fluid balance, nerve signaling, and muscle performance. However, the evidence base assembled here is predominantly composed of review articles, position papers, and guidelines rather than original clinical trials, which limits the strength of conclusions that can be drawn about specific supplementation protocols.
Read full evidence summary →Top studies
Effects of dietary supplements on athletic performance in elite soccer players: a systematic review.
Effects of dietary supplements on athletic performance in elite soccer players: a systematic review.
Efficacy and Safety of a High-Energy, Low-Protein Formula Replacement Meal for Pre-Dialysis Chronic Kidney Disease Patients: A Randomized Controlled Trial.
Efficacy and Safety of a High-Energy, Low-Protein Formula Replacement Meal for Pre-Dialysis Chronic Kidney Disease Patients: A Randomized Controlled Trial.
Expert Mentions
All 27 mentions
“zinc magnesium iodine potassium those are the big four that most of us are deficient in”
Potassium is one of the key minerals that almost all people are deficient in.
“zinc magnesium iodine potassium those are the big four that most of us are deficient in”
Magnesium is one of the key minerals that almost all people are deficient in.
Safety, interactions & who should avoid Electrolytes
Electrolytes are generally safe when consumed at physiologically appropriate levels, but imbalances — both deficiency and excess — carry serious risks including neurological injury, cardiac arrhythmia, and organ dysfunction, particularly in vulnerable groups such as kidney disease patients, preterm infants, and the elderly. Medical supervision is advised when electrolyte supplementation is used therapeutically or in the context of underlying health conditions.
Electrolyte imbalances — both deficiency and excess — can cause serious neurological and cardiovascular complications. Individuals with chronic kidney disease, renal impairment, or conditions affecting electrolyte regulation should exercise particular caution, as impaired excretion can lead to dangerous accumulation of potassium or other electrolytes.
Who should avoid it
Individuals with chronic kidney disease, renal failure, hyperkalemia, hypercalcemia, or other electrolyte regulation disorders should avoid unsupervised electrolyte supplementation and consult a healthcare provider. Pregnant individuals with hyperemesis gravidarum may have specific electrolyte needs that require clinical management rather than self-supplementation.
Known interactions
- ·Diuretics can deplete sodium, potassium, and magnesium, potentially compounding electrolyte imbalances
- ·ACE inhibitors and potassium-sparing diuretics may cause potassium retention, making additional potassium supplementation risky
- ·High calcium intake may interfere with magnesium and zinc absorption
- ·Certain medications for kidney disease or hypertension may require careful electrolyte monitoring when supplementing
Pregnancy & breastfeeding
Our sources specifically flag pregnancy or breastfeeding considerations for Electrolytes — see the cautions above.
We don’t assign pregnancy-safety ratings. Many supplements lack adequate safety data in pregnancy and breastfeeding, and the absence of a warning here does not mean a supplement is safe to take. Don’t start, stop, or continue any supplement while pregnant or nursing without your OB-GYN or midwife.
Read: Supplements during pregnancy & breastfeeding →This is educational information only. Consult a healthcare provider before starting any supplement.
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Key findings
- ·Electrolyte replacement is consistently endorsed across sports nutrition position statements for athletes engaged in prolonged or high-intensity exercise, particularly to replace sweat-related losses of sodium and other minerals.
- ·Calcium disorders are a recognized clinical concern, with electrolyte imbalances also linked to neurological injury, underscoring the importance of careful monitoring in medical settings.
- ·In preterm infants and patients with conditions like short bowel syndrome or chronic kidney disease, tailored electrolyte and nutritional management is a cornerstone of care, as highlighted by multiple specialty guidelines.
Evidence gaps
- ·The evidence base here contains only one RCT, meaning most conclusions rest on expert consensus and reviews rather than controlled experimental data — rigorous trials directly testing electrolyte supplementation outcomes in healthy populations are largely absent from this set.
- ·Optimal electrolyte dosing, timing, and formulation for athletic performance remain poorly defined by high-quality experimental evidence; current guidance is largely extrapolated from observational and review-level data.
- ·Long-term safety and efficacy of routine electrolyte supplementation outside of clinical deficiency states (e.g., as a wellness or performance supplement in the general population) is not well-addressed by the available literature.