Electrolytes
Electrolytes scored 8.0 / 10 (✅ Top-tier) on the BioHarmony scale as a Substance → Vitamin / Mineral / Nutrient.
What It Is
Electrolyte supplementation provides the charged minerals (sodium, potassium, magnesium) that govern cellular electrical signaling, fluid balance, nerve conduction, and muscle contraction. The body's Na+/K+-ATPase pump alone consumes 20-30% of basal metabolic energy. Mg2+ is a cofactor for 600+ enzymatic reactions. Type: Vitamin / Mineral / Nutrient (essential mineral supplement) Current status: Foundational dietary component with massive evidence base. Widely available as LMNT, Drip Drop, DIY formulas, and dozens of commercial products. No regulatory concerns.
Dosing & Protocols
Dosing information is summarized from published research and community reports. This is not a prescribing guide. Consult a healthcare provider before starting any protocol.
View 1 route and 4 protocols
Routes & Forms
| Route | Form | Clinical Range | Community Range |
|---|---|---|---|
| oral | powder / packet / capsule | 500-2000mg Na, 200-1000mg K, 200-400mg Mg per day DASH trial, Cheuvront 2014, Phinney 1983; dosing varies by activity and climate | 1-3 LMNT packets (1000-3000mg Na) Community consensus; keto/fasting populations skew higher |
Protocols
Daily maintenance (active/keto) Clinical + anecdotal
- Dose
- 1 LMNT packet (1000mg Na, 200mg K, 60mg Mg)
- Frequency
- daily
- Duration
- ongoing
Baseline for active individuals and low-carb dieters. LMNT is primarily a sodium supplement.
Pre-exercise loading Clinical
- Dose
- 500-1000mg Na in 500mL water
- Frequency
- 60-90 min before training
- Duration
- per session
Sims 2007: +21% time-to-exhaustion in heat. Expands plasma volume.
Heavy sweater/heat protocol Clinical + anecdotal
- Dose
- 2-3 packets + additional Mg
- Frequency
- throughout day
- Duration
- ongoing during heat/activity
Sweat rate varies 3-4x between individuals. Adjust by thirst, urine color, and body weight changes.
Extended fasting Anecdotal
- Dose
- 1-2 packets throughout fasting window
- Frequency
- daily during fast
- Duration
- duration of fast
Phinney 1983: 3-5g supplemental Na/day needed during ketosis/fasting.
Use-Case Specific Dosing
| Use Case | Dose | Notes |
|---|---|---|
| Endurance Cardio | 500-1000mg Na pre-exercise + ad libitum during | Sodium loading +21% TTE in heat; preventing >2% dehydration improves endurance 3-7% |
| Energy | 1 LMNT packet daily | Acute fatigue from dehydration resolves in 20-45 minutes |
| Cognition Focus | 1 LMNT packet daily | 1-2% dehydration degrades attention, working memory, mood (Ganio 2011, Armstrong 2012) |
| Cardiovascular | 200-1000mg K, 200-400mg Mg daily | K+ -3.5 mmHg SBP (Aburto 2013); Mg -2.0/-1.8 mmHg (Zhang 2016) |
How this score is calculated →
Upside (2.90 / 5.00)
| Dimension | Weight | Score | Visual | Weighted |
|---|---|---|---|---|
| Efficacy | 25% | 4.0 | 1.000 | |
| Breadth of Benefits | 15% | 3.8 | 0.570 | |
| Evidence Quality | 25% | 4.5 | 1.125 | |
| Speed of Onset | 10% | 5.0 | 0.500 | |
| Durability | 10% | 1.0 | 0.100 | |
| Bioindividuality Upside | 15% | 4.0 | 0.600 | |
| Total | 3.895 |
Upside Rationale
Efficacy (4.0/5.0) Strong, replicated effects. Preventing >2% dehydration improves endurance 3-7% (Cheuvront 2014 meta-analysis). Sodium loading increases time-to-exhaustion by 21% in heat (Sims 2007). Potassium reliably reduces blood pressure by 3.5 mmHg in hypertensives (Aburto 2013, 22 RCTs). Effects are dose-dependent and mechanistically clear.
Breadth of Benefits (3.8/5.0) Hydration, exercise performance, cognitive maintenance, recovery, blood pressure regulation, cramp prevention, fasting/keto support. Touches nearly every physiological system through its fundamental role in cellular electrical signaling.
Evidence Quality (4.5/5.0) Massive evidence base. Multiple Cochrane reviews, DASH trial, dozens of meta-analyses across exercise science, cardiology, and neuroscience. Independent replication across hundreds of labs worldwide. Among the most well-evidenced supplement categories.
Speed of Onset (5.0/5.0) Fastest onset of any supplement. Fluid absorption begins within minutes. Measurable plasma volume expansion in 15-30 minutes. Acute symptoms (headache, fatigue from dehydration) often resolve in 20-45 minutes.
Durability (1.0/5.0) Maintenance only. No accumulation or lasting adaptation. Benefits cease when supplementation stops. This is the one dimension holding electrolytes back from a higher score.
Bioindividuality Upside (4.0/5.0) Context-dependent but broadly applicable. Sweat rate varies 3-4x between individuals. Keto/low-carb dieters, athletes, hot-climate residents, and fasters all benefit strongly. Even sedentary people with mineral-poor diets benefit.
Downside (0.29 / 5.00)
| Dimension | Weight | Score | Visual | Weighted |
|---|---|---|---|---|
| Safety Risk | 30% | 1.3 | 0.390 | |
| Side Effect Profile | 15% | 1.5 | 0.225 | |
| Financial Cost | 5% | 2.0 | 0.100 | |
| Time/Effort Burden | 5% | 1.2 | 0.060 | |
| Opportunity Cost | 5% | 1.0 | 0.050 | |
| Dependency / Withdrawal | 15% | 1.0 | 0.150 | |
| Reversibility | 25% | 1.0 | 0.250 | |
| Total | 1.225 | |||
| Harm subtotal × 1.4 | 1.421 | |||
| Opportunity subtotal × 1.0 | 0.210 | |||
| Combined downside | 1.631 | |||
| Baseline offset (constant) | −1.340 | |||
| Effective downside penalty | 0.291 |
Downside Rationale
Safety Risk (1.3/5.0) Extremely safe at normal supplementation doses. Hypernatremia/hyperkalemia only at extreme doses or with renal impairment. Healthy kidneys efficiently regulate electrolyte balance.
Side Effect Profile (1.5/5.0) GI discomfort at high sodium on empty stomach. Salty taste aversion. Mild and easily managed (dilute, sip slowly).
Financial Cost (2.0/5.0) LMNT ~$45/mo, but DIY is $2/mo. Cost is entirely optional. DIY costs $0.02/serving vs LMNT ~$1.50/serving.
Time/Effort Burden (1.2/5.0) Mix a packet in water. Minimal preparation required.
Opportunity Cost (1.0/5.0) Complements everything. Zero opportunity cost. Enhances absorption of other supplements.
Dependency/Withdrawal (1.0/5.0) No physiological dependency. Ongoing need is dietary (like eating food), not tolerance-based.
Reversibility (1.0/5.0) Stop anytime. No withdrawal. No lasting effects after cessation.
Verdict
✅ Best for: Athletes, keto/low-carb dieters, fasters, hot-climate residents, sauna users, anyone with mineral-poor diets, and anyone experiencing fatigue, cramps, or headaches that may be dehydration-related. One of the highest-impact, lowest-risk interventions available.
❌ Avoid if: You have chronic kidney disease (potassium contraindicated without nephrology guidance), uncontrolled salt-sensitive hypertension, or heart failure with fluid restriction. Also unnecessary if sedentary on a processed-food diet (already getting excess sodium).
Use Case Breakdown
The overall BioHarmony score reflects the intervention's primary evidence profile. These subratings are independent assessments per use case.
| Use Case | Score | Summary |
|---|---|---|
| ✅ Endurance / Cardio | 8.5 | Preventing >2% dehydration improves endurance 3-7% (Cheuvront 2014); Na loading +21% TTE in heat (Sims 2007) |
| 💪 Recovery / Repair | 7.5 | Post-exercise rehydration critical for recovery; electrolyte-containing beverages superior to water (Shirreffs 1996) |
| 💪 Energy / Fatigue | 7.5 | Dehydration-related fatigue resolves in 20-45 min with rehydration; Na+/K+-ATPase pump drives cellular energy |
| 👍 Cognition / Focus | 6.5 | 1-2% dehydration degrades attention, working memory, mood in RCTs (Ganio 2011, Armstrong 2012); correction is rapid |
| 👍 Cardiovascular | 6.0 | K+ -3.5 mmHg SBP (Aburto 2013, 22 RCTs); Mg -2.0/-1.8 mmHg (Zhang 2016, 34 RCTs); Na:K ratio predicts CV outcomes |
| 👍 Cold / Heat Tolerance / Hormesis | 6.0 | Sodium loading and hydration critical for heat tolerance; plasma volume expansion supports thermoregulation |
| ⚖️ Metabolic Health | 5.0 | Mg cofactor for 600+ enzymatic reactions; proper hydration supports metabolic rate and glucose disposal |
| ⚖️ Strength / Power | 5.0 | Dehydration >2% impairs strength output; proper hydration maintains but does not enhance peak force |
| ⚖️ Pregnancy Safety | 5.0 | Electrolyte supplementation generally safe and recommended during pregnancy; standard prenatal guidance |
| ⚖️ Pediatric Use | 5.0 | Oral rehydration therapy is WHO standard for pediatric dehydration; well-established safety |
| ⚖️ Geriatric / Aging Population | 5.0 | Elderly at higher dehydration risk due to reduced thirst sensation; electrolyte supplementation commonly recommended |
| ○ Memory | 4.5 | Dehydration impairs short-term memory; correction restores baseline but does not enhance beyond it |
| ○ Mood / Emotional Regulation | 4.0 | Mild dehydration impairs mood in both sexes (Armstrong 2012); rapid correction with rehydration |
| ○ Stress / Resilience | 4.0 | Electrolyte balance supports cortisol regulation and stress response; dehydration amplifies perceived exertion |
| ○ VO2 Max | 4.0 | Plasma volume expansion supports cardiac output; dehydration reduces VO2max by 3-5% per 1% body mass loss |
| ○ Healthspan | 4.0 | Hydration and mineral balance support multiple aging-related systems; foundational rather than therapeutic |
| ○ Acute Pain Relief | 4.0 | Pickle juice cramp relief via neural reflex (Miller 2010); Mg for cramps (Garrison 2012 Cochrane: limited) |
| ○ Sleep Quality | 3.5 | Mg supports GABA and melatonin pathways; nighttime cramps reduced; electrolyte balance aids sleep onset |
| ○ Mitochondrial | 3.0 | Na+/K+-ATPase consumes 20-30% basal ATP; proper electrolyte balance supports mitochondrial energy output |
| ○ Blood Sugar / Glycemic Control | 3.0 | Mg involved in insulin signaling; dehydration impairs glucose tolerance; indirect support |
| ○ Kidney Function | 3.0 | Adequate hydration is protective; electrolyte balance supports renal function; contraindicated in CKD |
| ○ Bone / Joint Health | 3.0 | Mg supports bone mineral density; K+ may reduce urinary calcium loss; indirect evidence |
| ○ Anxiety | 3.0 | Mg component has anxiolytic evidence (Boyle 2017); hydration supports baseline nervous system function |
| ○ Reaction Time / Coordination | 3.0 | Dehydration impairs reaction time; correction restores baseline |
| ○ Muscle Growth / Hypertrophy | 3.0 | Cell hydration supports protein synthesis signaling; permissive, not anabolic |
| ○ Longevity / Lifespan | 3.0 | Chronic dehydration is an independent mortality risk factor; supplementation is preventive |
| ○ Injury Recovery | 3.0 | Adequate hydration supports tissue repair; no direct evidence for accelerated healing |
| ○ HRV / Vagal Tone / Autonomic Balance | 3.0 | Dehydration reduces HRV; proper hydration supports parasympathetic tone indirectly |
How This Score Could Change
BioHarmony scores are living assessments. New research, regulatory changes, or personal context can shift the score up or down. These are the most likely scenarios that would change this intervention's rating.
| Scenario | Dimension changes | New score |
|---|---|---|
| Durability somehow improved (impossible for electrolytes) | Durability 1.0→3.0 | 8.3 / 10 ✅ Top-tier |
| Long-term study confirms PURE J-curve for active populations | Evidence 4.5→5.0 | 8.1 / 10 ✅ Top-tier |
| Electrolyte toxicity case in healthy athlete | Safety 1.3→2.0 | 7.7 / 10 💪 Strong recommend |
Key Evidence Sources
- Cheuvront SN, Kenefick RW (2014) - Dehydration and performance meta-analysis — Definitive meta on >2% dehydration impairing endurance 3-7%
- Sims ST et al. (2007) - Sodium loading in heat — +21% time-to-exhaustion with sodium loading
- Ganio MS et al. (2011) - Mild dehydration impairs cognition in men — 1-2% dehydration degrades attention and working memory
- Armstrong LE et al. (2012) - Dehydration and mood in women — Mood and cognitive degradation at mild dehydration
- Sacks FM et al. (2001) - DASH-Sodium trial — Landmark sodium and blood pressure trial
- Aburto NJ et al. (2013) - Potassium and BP meta-analysis — 22 RCTs; K+ -3.5 mmHg SBP in hypertensives
- Zhang X et al. (2016) - Magnesium and BP meta-analysis — 34 RCTs; Mg -2.0/-1.8 mmHg BP
- Maughan RJ et al. (2016) - Beverage Hydration Index — Electrolyte-containing beverages retain fluid better than water
- Phinney SD et al. (1983) - Ketosis and sodium — 3-5g supplemental Na/day needed during ketosis
- Mente A et al. (2014) - PURE study sodium J-curve — Lowest CV risk at 3-6g/day Na, not <2.3g
- Holland JJ et al. (2017) - Sodium and endurance performance — Sodium supplementation during endurance exercise
- Miller KC et al. (2010) - Pickle juice and cramps — Cramp relief via neural reflex, not electrolyte repletion
- Garrison SR et al. (2012) - Magnesium for cramps Cochrane — Limited evidence for Mg and muscle cramps
- Boyle NB et al. (2017) - Magnesium and stress — Mg supplementation and subjective anxiety/stress reduction
- Shirreffs SM et al. (1996) - Post-exercise rehydration — Electrolyte-containing beverages superior for rehydration
Other interventions for Cognition / Focus
See all ratings →📊 How BioHarmony scoring works
BioHarmony translates a weighted expected-value calculation into a reader-facing 0–10 score. 5.0 is neutral (benefits and risks balance). Above 5 = benefits outweigh risks; below 5 = risks outweigh benefits.
Harm-type downsides (safety risk, side effects, reversibility, dependency) carry a 1.4× precautionary multiplier. Harm weighs more than benefit. Opportunity-type downsides (financial cost, time/effort, opportunity cost) are subtracted at face value.
Use case subratings are independent assessments of how well the intervention addresses specific health goals. They are not components of the overall score. Each subrating reflects the scorer's judgment based on use-case-specific evidence, safety, and effect sizes.
Every dimension is evaluated on a 1–5 scale, and the baseline (1) is subtracted before weighting. A perfect intervention with zero downsides contributes zero penalty rather than a residual floor, so top-tier scores are actually reachable.
EV = Upside − Downside
EV = 2.895 − 0.291 = 2.604
EV ranges from −5 to +5. Adding 7 shifts to 2–12, dividing by 12 normalizes to 0–1, then ×10 gives the 0–10 score.
Score = ((2.604 + 7) / 12) × 10 = 8.0 / 10
