Mineral Testing
Red Blood Cell Minerals Test
Also known as: Red blood cell (intracellular) toxic & nutrient elements
Also searched as: RBC magnesium test · RBC zinc test · intracellular mineral test · magnesium deficiency test
Minerals inside your cells — including red blood cell magnesium and zinc — plus metals that collect in red blood cells.
Standard blood mineral tests measure the liquid part of your blood, which the body keeps in a tight range even when stores are low. Red blood cells hold their own mineral stores, so measuring inside the cell gives a closer look at intracellular status — especially magnesium, which lives mostly inside cells. This test also picks up recent or ongoing exposure to metals that accumulate in red cells. You may also see it called "RBC magnesium test", "RBC zinc test", or "intracellular mineral test".
What the Red Blood Cell Minerals Test measures
Nutrient Elements
The essential minerals measured inside your red blood cells.
- BoronSupports bone health and mineral metabolism.
- CalciumBone, nerve signaling, and muscle contraction.
- ChromiumHelps insulin move sugar into cells.
- CopperEnergy, iron use, and neurotransmitters.
- IronOxygen transport inside red blood cells.
- MagnesiumLives mostly inside cells — energy, sleep, and a calm nervous system.
- ManganeseBlood sugar, bones, and antioxidant defense.
- MolybdenumEnzymes for detoxification and sulfur metabolism.
- PhosphorusEnergy and protein metabolism.
- PotassiumFluid balance and nerve signals inside cells.
- SeleniumThyroid hormone conversion and antioxidant defense.
- ZincImmunity, skin repair, hormone production, and mood.
Toxic Elements
Metals that accumulate in red blood cells with recent or ongoing exposure.
- ArsenicRice, well water, some seafood and poultry.
- CadmiumCigarette and vape smoke, contaminated soil.
- CesiumEnvironmental exposure reviewed for excess.
- LeadOld paint, dust, older plumbing.
- MercurySome fish, amalgam fillings, some cosmetics.
- ThalliumEnvironmental exposure reviewed for excess.
Who the Red Blood Cell Minerals Test is for
A good fit if your standard bloodwork keeps coming back 'normal' but your symptoms say otherwise — especially when magnesium or zinc is the suspected gap, since both live mostly inside cells.
- Muscle cramps or twitches
- Fatigue
- Poor sleep
- Anxiety or feeling on edge
- Heart palpitations
- "Normal" serum magnesium but ongoing symptoms
Two ways to get the Red Blood Cell Minerals Test
Request This Lab
- At-home or in-office collection, depending on the test
- Our team helps you order and set up your kit
- Add Tiffeny Parker as your practitioner so I can see your results
Personalized with Tiffeny
RecommendedWant your results personally reviewed?
- One-on-one interpretation of your results
- Written Root Cause Report
- Personalized 12-week protocol
✦ Program members: practitioner discount applied. See member perks →
Labs are processed by a CLIA-certified laboratory partner. To protect your privacy, I can only see your results if you add Tiffeny Parker as your practitioner. Lab order links are affiliate links; I may earn a commission at no extra cost to you.
What results can reveal
- Intracellular magnesium and zinc status
- Cellular mineral stores standard blood tests miss
- Recent or ongoing toxic metal exposure
- Patterns that confirm or refine your hair test results
How we interpret it
We read every panel through a functional lens — optimal reference ranges, ratios, and cross-panel patterns. Results become part of your written Root Cause Report and your personalized 12-week protocol.
A blood-based check on cellular mineral status that complements your hair test — useful for confirming magnesium and zinc needs and tracking them over time.
Often paired with
Minerals & Metals Test
Cellular mineral status and heavy metal burden — the foundation of the Method.
Zinc & B6 Depletion Test
A urine marker linked to zinc and vitamin B6 loss — and the stress, anxiety, and mood patterns that follow.
Blood Minerals & Metals Test
Whole-blood levels of essential minerals and toxic metals, for recent or ongoing exposure.
Often used alongside this lab
Ready-made options people often use while working on these results. Program members get a personalized plan, with a practitioner discount applied.
Full Spectrum Magnesium
Several forms of magnesium in one — for energy, muscles, sleep, and a calm nervous system.
See in the shop →Balanced Zinc
Zinc balanced with a small amount of copper to help keep the zinc–copper ratio steady.
See in the shop →Common questions
Not sure which panels you need?
Start with the Root-Cause Fit Assessment. Takes about 3–5 minutes. If it looks like we're a good fit, you'll be invited to schedule a 45-minute consultation to discuss your health history, goals, and whether this program is the right next step for you.
Educational information only. Functional lab testing is not intended to diagnose, treat, cure, or prevent any disease. Results are reviewed in the context of your full health history.