Neurological function and nerve transmission
May support proper nerve function and neurological health
Rubidium
Ultra-trace alkali metal with potential neurological and cardiovascular benefits, naturally found in small amounts in food and water
Scientific nameRubidium (Rb)
FormulaRb
Molecular weight85.47 g/mol
CAS7440-17-7
70
absorption score
5
safety / 10
25
USD per month
6
documented interactions
Check it against something
Rubidium with:
- Amylase
- Ashwagandha
- Avocado Oil
- BCAA (Branched-Chain Amino Acids)
- Beetroot Powder
- Beta-Alanine
- Bifidobacterium lactis
- Bifidobacterium longum
- Bovine Collagen
- Caffeine
- Calcium
- Calcium Bone Formula
- Calcium Carbonate
- Casein Protein
- Chicken Collagen
- Choline (Bitartrate)
- Chondroitin Sulfate
- Coconut Oil
- Collagen Peptides
- Comprehensive Immune Support Complex
- Comprehensive Multivitamin-Mineral Complex
- Creatine HCL
- Creatine Monohydrate
- D-Mannose
- DHA
- Electrolyte Blend
- EPA
- Fish Oil (EPA/DHA)
- Folate (5-MTHF)
- Ginger
- Iron Fumarate
- Iron Sulfate
- Joint Mobility Formula
- Keratin
- Krill Oil
- L-Carnitine
- L-Citrulline
- Lactase
- Lactobacillus acidophilus
- Lactobacillus rhamnosus
- Lipase
- Magnesium Citrate
- Magnesium Glycinate
- Magnesium Oxide
- Marine Collagen
- Melatonin
- Modafinil
- Olive Oil Extract
- Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula
- Papain
- Potassium Citrate
- Protease
- Saccharomyces boulardii
- Turmeric
- Vitamin B12 (Cyanocobalamin)
- Vitamin B12 (Methylcobalamin)
- Vitamin C (Ascorbic Acid)
- Vitamin C (Sodium Ascorbate)
- Vitamin D3
- Whey Protein
- Zinc Gluconate
Nothing found
66
out of 100
Needs attention
Separate by 2-4 hours to avoid the interaction below.
What it does
mechanism and evidence for each claimCardiovascular health and blood pressure support
May contribute to healthy cardiovascular function
Cellular membrane function and integrity
Supports proper cellular membrane function and stability
Mood regulation and emotional balance
May contribute to mood stability and emotional well-being
Metabolic support and energy production
May support cellular metabolism and energy processes
Others take these for the same thing
Same goal, different mechanism — check any of them against this one
Vitamin B12 (Cyanocobalamin)
Energy & nerve support
250-1000 mcg
A
70%
Fish Oil (EPA/DHA)
Heart & brain health
1-2g EPA/DHA
A
85%
L-Theanine
Calm focus & stress relief
100-400mg
B
90%
Vitamin B8 (Inositol)
Mental health & PCOS support
2-18g (condition dependent)
B
95%
SAM-e
Mood support & liver health
400-800mg
A
70%
Lithium Orotate
Mood & brain support
1-20mg
C
60%
Every pair we checked
12 combinations scored by the engine
Rubidium + Potassium Citrate
High potassium may compete with rubidium functions
Needs attention
66
Rubidium + Iodine (Potassium Iodide)
High potassium may compete with rubidium functions
Needs attention
66
Rubidium + Caffeine
No documented interaction either way
No known interaction
70
Rubidium + Creatine Monohydrate
No documented interaction either way
No known interaction
70
Rubidium + Vitamin D3
No documented interaction either way
No known interaction
70
Rubidium + Calcium Carbonate
No documented interaction either way
No known interaction
70
Rubidium + Whey Protein
No documented interaction either way
No known interaction
70
Rubidium + Lactase
No documented interaction either way
No known interaction
70
Rubidium + Bovine Collagen
No documented interaction either way
No known interaction
70
Rubidium + DHA
No documented interaction either way
No known interaction
70
Rubidium + Magnesium Oxide
Complementary cellular and neurological support
Works better together
75
Rubidium + Trace Mineral Complex
Comprehensive trace element support
Works better together
75
Dosage
DailyTrace amounts (mcg range)
Trace supplementationMicrogram amounts only
Research useVaries by study protocol
Therapeutic useNot established
Safety limitUnknown - use extreme caution
Before you take it
VeganYes
When to expect it
First Effects4-8 weeks for initial cellular and neurological effects
Peak Benefits8-16 weeks for maximum trace element benefits
Deficiency DevelopmentUnknown - not established as essential nutrient
Toxicity OnsetUnknown threshold - limited safety data
How to measure it
MarkerSerum rubidium levels (research only)
OptimalNot established - research values only
Deficient belowNot defined - not essential nutrient
FrequencyNot recommended for routine monitoring
Works better with
+
Potassium
Similar cellular functions and potential synergistic effects
Both alkali metals support cellular ion transport · level C
+
Magnesium
Complementary cellular and neurological support
Both support cellular function and nerve transmission · level C
+
Trace Minerals
Comprehensive trace element support
Complete mineral profile for optimal cellular function · level CWhat not to take with Rubidium
!
Excessive Sodium
May interfere with rubidium cellular functions
Competing alkali metal effects on cellular ion balance · minor significance
!
Potassium Excess
High potassium may compete with rubidium functions
Similar cellular pathways and receptor sites · minor significance
!
Heavy Metals
Heavy metals may interfere with trace element function
Displacement and interference with cellular processes · moderate significanceMedication interactions
Discuss these with a pharmacist before combiningMay theoretically interact with drugs affecting ion channels
What to do: Avoid supplementation with heart medications
Unknown interactions with drugs affecting nerve function
What to do: Consult healthcare provider before use
May theoretically affect blood pressure medications
What to do: Monitor blood pressure if using together
Available forms
Rubidium chloride: Simple form, Water-soluble, Research available, Stable compound
Food sources
Tea and coffee
Small amounts - varies by source · 70
Fruits and vegetables
Trace amounts - depends on soil content · 65
Grains and cereals
Trace amounts - varies by growing conditions · 60
Research-grade supplements
Variable - no standardized doses · 70
Too little
- Rubidium deficiency not established (not recognized as essential):
- Theoretical symptoms might include:
- Impaired cellular membrane function
- Reduced neurological function and nerve transmission
- Compromised cellular ion balance and transport
- Potential mood and cognitive effects
- Reduced cellular energy production and metabolism
Too much
- Rubidium toxicity symptoms (limited data):
- Potential cellular dysfunction and metabolic disruption
- Electrolyte imbalances and ion transport interference
- Unknown neurological effects from excessive intake
- Possible cardiovascular effects from ion channel disruption
- Limited safety data - toxicity threshold unknown
Who benefits most
neurological-health-support
May support nerve function and neurological health
Trace amounts only - no established dose
cardiovascular-optimization
Potential cardiovascular and blood pressure benefits
Trace amounts only
cellular-health-seekers
May support cellular membrane function and integrity
Trace amounts only
mood-balance-optimization
Potential mood regulation and emotional balance benefits
Trace amounts only
comprehensive-mineral-users
Complete trace element profile for optimal health
Trace amounts in multi-mineral formulasWhere to buy it
Look for Rubidium at Trace amounts (mcg range) per serving. The form that matters here is Rubidium chloride.
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What else affects it
Beyond other supplements
!
Excessive sodium
May interfere with rubidium cellular functions
Competing alkali metal effects on cellular ion balance
!
Heavy metals
Heavy metals may interfere with trace element function
Displacement and interference with cellular processesHow it works
- Functions as alkali metal similar to potassium in cellular processes
- Involved in cellular ion transport and membrane potential maintenance
- May influence nerve signal transmission and neurological function
- Contributes to cellular ion gradients and membrane stability
- Potential effects on neurotransmitter systems and brain chemistry
- May support cellular metabolism and enzyme function
Key findings
what the evidence supports- Limited research on biological functions and health effects
- Potential neurological and cardiovascular benefits need more study
- Safety profile not well-established for supplemental use
- May have similar functions to other alkali metals like potassium
Sources: NIH Examine.com · data reviewed 2026-08-01
Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →
Common questions
What are the benefits of Rubidium?
Documented effects: Neurological function and nerve transmission; Cardiovascular health and blood pressure support; Cellular membrane function and integrity; Mood regulation and emotional balance. May support proper nerve function and neurological health
How much Rubidium should you take per day?
The common daily range is Trace amounts (mcg range). By goal — trace supplementation: Microgram amounts only; research use: Varies by study protocol; therapeutic use: Not established; safety limit: Unknown - use extreme caution.
When is the best time to take Rubidium?
With meals. First effects are typically reported within 4-8 weeks for initial cellular and neurological effects.
What are the side effects of Rubidium?
At excessive doses: Rubidium toxicity symptoms (limited data):, Potential cellular dysfunction and metabolic disruption, Electrolyte imbalances and ion transport interference, Unknown neurological effects from excessive intake, Possible cardiovascular effects from ion channel disruption. Safety rating at normal doses is 5 out of 10.
What should you not take with Rubidium?
Separate it from Excessive Sodium, Potassium Excess, Heavy Metals by two to four hours. May interfere with rubidium cellular functions
Does Rubidium interact with medications?
Documented interactions with heart-medications, neurological-medications, blood-pressure-medications. Discuss these with a pharmacist before combining.
How do you know if you need Rubidium?
The marker is Serum rubidium levels (research only), optimal range Not established - research values only. Common deficiency signs: Rubidium deficiency not established (not recognized as essential):, Theoretical symptoms might include:, Impaired cellular membrane function, Reduced neurological function and nerve transmission.