Potassium
Research Reliability -
An essential electrolyte mineral that supports healthy blood pressure, muscle contractions, and cardiovascular function.
Appetite
Mood
Sleep
Potassium
Description
Potassium is the primary intracellular electrolyte and is essential for maintaining fluid balance, nerve signal transmission, and muscle contraction, including that of the heart. Low potassium intake is strongly associated with elevated blood pressure and increased cardiovascular risk. Most people fall short of the recommended daily intake due to low fruit and vegetable consumption. Supplementing potassium can help counterbalance excess sodium, support kidney health, and reduce muscle cramps, particularly in active individuals.
Effects
First days
cramps and muscle twitches may ease if you were low
Week 1
steadier blood pressure and hydration
Ongoing
electrolyte balance
How it Feels
If you were low, easing muscle cramps and a settled heartbeat can be noticeable within days. Supplemental potassium is capped low by law for safety, so most repletion still comes from food. Do not stack high doses if you have kidney issues.
Usage
Entry Dose
99mg
Standard Dose
200–400mg
Max Dose
400mg (supplement; diet provides rest)
Onset
Days–1 week
Combinations
Pairs well with
Synergistic
Magnesium — magnesium is required to maintain intracellular potassium levels
Vitamin B6 — B6 supports sodium-potassium ATPase pump function
Electrolytes (full spectrum) — potassium functions within the full electrolyte balance system
Avoid combining
Contraindicated
ACE inhibitors / ARBs — these drugs raise potassium; supplementation risks hyperkalemia
Potassium-sparing diuretics — combined supplementation can cause dangerous hyperkalemia
Biomarkers to Track
Subjective
(Daily)
Muscle cramps frequency
Energy and fatigue levels (1–10)
Heart palpitation frequency
Objective
(Quarterly)
Serum potassium level
Blood pressure (resting)
Resting heart rate
Supplemental doses are capped low by law for good reason: too much potassium can cause dangerous heart rhythms.
Anyone with kidney disease or on potassium-sparing diuretics or ACE inhibitors, unless a doctor directs it.
Stacking high-dose potassium without medical oversight, and relying on pills instead of food.
Strong (human RCTs / meta-analyses)
People with kidney disease or on certain blood pressure medications should not supplement potassium without medical supervision, due to hyperkalemia risk.
Aburto NJ et al. (2013). BMJ. Meta-analysis (potassium intake and blood pressure/stroke). PMID: 23558164.