Bromide.
Bromide is a salt anion that moves through the body much like chloride. It has no known job in human nutrition and isn't something you add on purpose.
- Category
- Compound
What Bromide is, and what it does.
- Does it work
- This one matters to label readers more than supplement takers. It's worth recognising when it turns up as a counter ion in a mineral salt.
- How much to take
- No intake amount is on record and no human requirement is established. Where bromide appears it's part of a salt rather than a target dose.
- Time to feel it
- At everyday dietary exposure there's no sensation to track. Clearance takes roughly ten to twelve days, so any change in exposure shows up slowly.
- The first dose
- A single day of ordinary exposure passes without a sensation. It spreads through extracellular fluid and leaves through the kidney over days.
- With regular use
- Because clearance is slow relative to intake intervals, bromide accumulates rather than reaching a quick steady state. Higher chloride intake speeds it up.
- How well tolerated
- Sustained high intake acts on chloride channels in the nervous system and competes with iodide at the thyroid. Talk to your doctor about repeated bromide exposure.
- How it feels
- No day-to-day sensation at dietary levels. Where it shows is in lab chemistry: serum bromide, and a falsely high chloride reading on standard assays.
- The overlooked benefit
- A surprisingly high serum chloride result can be bromide fooling the assay, which is a genuinely useful thing for you and your doctor to know.
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
- distribution and renal clearance in competition with chlorideNarrative review
- competition with iodide at the sodium iodide symporterIn vitro study
- central depressant activity at ligand-gated chloride channels with sustained high intakeNarrative review
- interference with laboratory chloride assaysNarrative review
- accumulation with continued intake because of slow clearanceNarrative review
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
The sodium iodide symporter transports several halides, and bromide is one of them. High bromide exposure reduces thyroid iodide uptake by direct competition at the transporter. This is textbook halide handling and is the single most relevant interaction for anyone considering bromide intake.
The kidney handles bromide and chloride through the same reabsorption pathways, so raising chloride intake shortens the bromide half life and lowering it lengthens it. This is why saline loading is the established way to clear accumulated bromide. The same is true in the other direction, and a low salt intake slows clearance.
When bromide appears it is nearly always as potassium or sodium bromide, and the counter ion contributes to the daily potassium or sodium load. In formulation terms the salt choice is an electrolyte decision as much as a halide one. It should be counted against total intake, not ignored.
Bromide competes with iodide at uptake, while selenium dependent deiodinases act further downstream in hormone conversion. The two touch the same axis at different steps. Nothing here shows that selenium offsets bromide, and it should not be presented that way.
Algae products are frequently promoted as removing bromide from the body. Bromide is a small freely distributed anion cleared by the kidney, not a heavy metal held by binding agents, so the proposed route does not match how the ion actually behaves. The claim deserves scepticism rather than repetition.
Nothing specific on file for Bromide. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Bromide actually does.
Bromide is a charged particle that spreads through body fluid much like chloride does and is cleared almost entirely by the kidneys.
The kidneys reabsorb bromide in competition with chloride, so it takes roughly ten to twelve days to clear half of it on a normal chloride intake, and clears faster when you eat more chloride.
Bromide is carried by the same transporter as iodide, so it competes with iodide for uptake into the thyroid.
Bromide can substitute for chloride at certain nerve receptor channels, which is the basis for its calming effect on the nervous system at sustained high intakes.
Where Bromide comes from.
Bromide is a salt cousin of chloride, pulled out of brine. The body clears it slowly, which means it builds up with repeated intake, and it competes with iodide for entry into the thyroid.
From a mineral source, then refined and usually bound to a carrier so the body can take it up.
Deep well brines, Dead Sea brine and seawater bitterns carry the commercial bromide supply
Chlorine gas oxidises bromide to elemental bromine, which is stripped from the brine with steam or air
Bromine is reacted with the chosen base or carbonate to make the sodium or potassium salt
Salt is recrystallised to remove bromate, chloride and heavy metal residues
Lots specified for bromide assay and for residual bromate, which is a separate and unwanted species
Supplied as dry salt or as a stock solution for compounding
Getting Bromide from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- The authors report that bromide supplementation worsened kidney function and fibrosis measures in their model rather than improving them.Animal study. Yokota et al., 2017 (PLoS One). PMID 28873450 โ
- The authors report changes in growth and immune measures when a dimethylsulfonium bromide compound was added to non fish meal diets.Animal study. Wu et al., 2020 (Fish and Shellfish Immunology). PMID 33096248 โ
These are the studies our verdict leans on, chosen from the 2 we read for Bromide. The full linked list is below.
The studies, linked.
11 sources behind our Bromide verdict: peer-reviewed studies and registered clinical trials. Every one links straight to PubMed, the journal, or ClinicalTrials.gov. Read them yourself.
- Clinical trialOutcomes From Initial Maintenance Therapy With Fluticasone Propionate 250/Salmeterol 50 (FSC) or Tiotropium in Chronic Obstructive Pulmonary DiseaseClinicalTrials.gov โ22,223 participants, Completed
- Clinical trialRocuronium vs Cis-atracurium: Do Rocuronium Still 'ROCKS' In Coronary Artery Bypass GraftingClinicalTrials.gov โ289 participants, Completed
- Clinical trialA Randomized, Double-blind, Multicenter, 2-period Single-dose Cross-over Study to Assess the Early Bronchodilation of Glycopyrronium Bromide (44 ฮผg o.d.) Compared to Tiotropium (18 ยตg. o.d.) in Patients With Moderate to Severe COPD (FAST Study)ClinicalTrials.gov โPhase 4, 152 participants, Completed
- Clinical trialA Phase II Study to Investigate Mannitol Challenge as a Tool to Predict Treatment Response to Inhaled Corticosteroids in COPDClinicalTrials.gov โPhase 2, 140 participants, Completed
- Clinical trialThe Effectiveness of Low Pressure Pneumoperitoneum During Laparoscopic Colorectal Surgery in Preserving Innate Immune Homeostasis by Reducing Peritoneal Mesothelial Cell Injury.ClinicalTrials.gov โPhase 4, 100 participants, Completed
- Clinical trialA Phase 2, Randomized, Double-Blind, Active-Controlled, Evaluation of Intubation Conditions Following BX1000 or Rocuronium in Subjects Undergoing SurgeryClinicalTrials.gov โPhase 2, 80 participants, Completed
- Clinical trialDefining and Treating a New Pediatric Asthma Endotype: Depression-related Asthma Mediated by the Cholinergic PathwayClinicalTrials.gov โEarly phase 1, 39 participants, Completed
- Clinical trialUse of Hyoscine Butyl Bromide for Management of Prolonged Labor in Nulliparous Women, A Randomized Controlled TrialClinicalTrials.gov โPhase 3, 500 participants, Unknown
- Clinical trialAirway Responsiveness in Patients With AECOPD Mechanical Ventilation by Inspiratory and Bronchial Dilation Testchronic Obstructive Pulmonary DiseaseClinicalTrials.gov โ120 participants, Unknown
- Clinical trialEvaluation of EEG With Respect to the Change of Depth of AnesthesiaClinicalTrials.gov โPhase 4, 40 participants, Unknown
- Clinical trialPyridostigmine for the Treatment of Constipation in Parkinson DiseaseClinicalTrials.gov โPhase 2, 16 participants, Recruiting
Evidence surfaced via Semantic Scholar (Allen Institute for AI) and ClinicalTrials.gov. Ranked by study type and citation weight, not cherry-picked.
Problems people have reported.
Read this carefully. These are 639,802 voluntary, unverified reactions reported to the FDA (openFDA). The number mostly reflects how popular Bromide is, not how risky it is. A report is not proof Bromide caused anything. It is a signal of what to watch for, nothing more.
Source: openFDA adverse-event reports. Voluntary reporting, not an incidence rate.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.