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What plasma vitamin C measures what deficient versus adequate looks like and what to test alongside it
What riboflavin measures why EGRAC beats plasma and what to test alongside it
What serum B12 measures why MMA is the functional companion and how to interpret your result
What serum magnesium measures, why a normal result can hide depletion, and what to pair it with.
What selenium measures, why antioxidant enzyme activity plateaus at sufficiency, and what low or high levels signal.
What MMA measures, why it detects functional B12 deficiency earlier than serum B12, and what confounders affect the result.
What RBC folate measures across 120 days, how it differs from serum folate, and what low or high values mean alongside B12.
What 25-OH vitamin D measures, how the PTH feedback loop works, and what to test alongside it.
What plasma PLP measures the inflammation confounder and what to test alongside it
What vitamin K measures how PIVKA-II reveals functional status and what to test alongside it
What serum vitamin E measures how lipoprotein levels affect your result and what to test alongside it
What serum retinol measures, how inflammation fakes deficiency, and what to test alongside it.
What homocysteine measures, why it rises, how to read your result alongside B12 and kidney markers.
What serum folate measures, why it differs from RBC folate, the B12-masking pattern, and how to read your result.
Elevated folate from supplements can mask vitamin B12 deficiency and may be associated with other biological effects. Here is what the evidence shows.
What a serum folate result above 20 ng/mL indicates, whether it requires any action, and how to interpret it alongside related biomarkers.
Vitamin K blood testing evaluates your body’s vitamin K status. Vitamin K is a fat-soluble family of nutrients that we get mainly as K1 from leafy greens and plant oils (phylloquinone) and as K2 from animal and fermented foods and from gut bacteria (menaquinones). Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin E blood testing measures the circulating amount of vitamin E—the body’s principal fat-soluble antioxidant. Vitamin E is a family of related compounds (tocopherols and tocotrienols) obtained from foods like nuts, seeds, vegetable oils, and leafy greens. In humans, the liver selectively keeps and releases alpha-tocopherol, making it the dominant form in blood. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin D, 25-hydroxy blood testing measures the amount of 25-hydroxyvitamin D (25[OH]D, calcidiol) circulating in your blood. This molecule is produced in the liver from vitamin D that your body makes in the skin from sunlight or gets from food and supplements. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin C blood testing measures the amount of vitamin C (ascorbic acid, present mainly as ascorbate) circulating in your bloodstream. Vitamin C is an essential, water-soluble nutrient that humans must obtain from food Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin B6 (plasma) is the amount of vitamin B6 circulating in your blood. Vitamin B6 is a water‑soluble nutrient you get from food and supplements. After absorption in the small intestine, the liver converts it into its active coenzyme forms, mainly pyridoxal 5′‑phosphate (PLP) and to a lesser extent pyridoxamine phosphate (PMP), derived from the parent compounds pyridoxine, pyridoxal, and pyridoxamine. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin B2 (riboflavin) blood testing measures the amount of riboflavin circulating in your blood, largely present in its active forms. Riboflavin is a water‑soluble B vitamin your body cannot store well and must obtain from the diet. After absorption in the small intestine, it travels in the bloodstream mainly as flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which are taken up by tissues as needed. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin B12 blood testing measures the amount of vitamin B12 carried in your bloodstream. Vitamin B12 (cobalamin) is an essential nutrient obtained from animal-based foods and supplements. After eating, stomach acid frees B12 from food; it binds to a stomach-made carrier called intrinsic factor and is absorbed in the last part of the small intestine (ileum). Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin A blood testing measures the amount of active vitamin A in your bloodstream, mainly as retinol. Vitamin A comes from animal foods as preformed vitamin A (retinol, retinyl esters) and from plants as provitamin A (carotenoids) that your intestine and liver convert to retinol. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Selenium blood testing measures the amount of selenium in your bloodstream—a trace mineral your body needs but cannot make. Selenium comes from the diet, especially plants grown in selenium‑rich soil and animal foods. After absorption in the gut, it circulates attached to proteins in the blood (notably selenoprotein P) and is built into specialized enzymes as the amino acid selenocysteine. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Methylmalonic acid (MMA) is a small organic acid your body produces while breaking down certain proteins and fats. It forms inside mitochondria during the propionate pathway, where fragments from odd‑chain fatty acids and specific amino acids are converted toward energy use. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Magnesium blood testing measures the amount of magnesium circulating in the liquid part of your blood (serum magnesium). Magnesium is an essential mineral and electrolyte. You get it from food and water; it’s absorbed in the gut and distributed throughout the body. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Homocysteine is a sulfur‑containing amino acid your body makes as it breaks down methionine from dietary protein. It is not taken in from food; it appears briefly inside cells as a crossroads in the methionine cycle. From there, it can be recycled back to methionine using folate and vitamin B12 (remethylation via 5‑methyltetrahydrofolate and methionine synthase), or shunted toward making cysteine using vitamin B6 (transsulfuration via cystathionine β‑synthase). Available at 2,000+ lab locations and at-home (select states). See FAQs below
Folate, RBC is a measure of the folate stored inside your red blood cells. Folate is a B vitamin from food (vitamin B9) absorbed in the small intestine and converted into active forms (tetrahydrofolate, 5‑methyltetrahydrofolate). As red blood cells are produced in the bone marrow (erythropoiesis), they take up folate and keep it for their lifespan. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Folate is a water-soluble B vitamin your body cannot make on its own (vitamin B9; folates). You get it from food—especially leafy greens, legumes, and fortified grains—or as folic acid in supplements. After absorption in the small intestine, the body converts it into active forms (tetrahydrofolate, THF) and stores a small amount in the liver. Available at 2,000+ lab locations and at-home (select states). See FAQs below
Vitamin D testing clarifies your body’s calcium balance, bone strength, and immune regulation (25‑hydroxyvitamin D; serum calcium). At Superpower, we provide blood tests for testing vitamin D and calcium for vitamin D Deficiency—in-clinic or at home. Home testing is available in selected states. (See FAQs below for more info).
Vitamin B12 deficiency impairs red blood cell production and nerve function, leading to anemia and neuropathy. Blood testing confirms status early. Superpower offers hemoglobin, MCV, MCH, MCHC, RDW, vitamin B12, and folate testing, in-clinic or at home. Home testing is available in selected states. (See FAQs below for more info).
Blood testing is essential to detect osteomalacia, revealing impaired bone mineralization and related metabolic stress. At Superpower, we test vitamin D, calcium, and ALP (alkaline phosphatase). We offer in‑clinic and at‑home options; home testing for osteomalacia is currently available in selected states. (See FAQs below for more info).
Blood testing for malnutrition clarifies protein status, micronutrient reserves, and systemic risk. At Superpower, we test albumin, total protein, vitamin D, folate, and B12. Superpower provides both in-clinic and at-home blood testing. Home blood testing for malnutrition is available in selected states. (See FAQs below for more info).
Early blood testing for homocystinuria helps detect disrupted methylation and connective tissue risk. Superpower offers homocysteine, folate, and vitamin B12 assays to assess this pathway. Choose in-clinic or at-home collection; home testing is currently available in selected states. (See FAQs below for more info).
Blood testing clarifies folate status and detects folate-deficiency anemia affecting oxygen delivery (erythropoiesis). At Superpower, we test hemoglobin, MCV, MCH, RDW, and folate. We offer in-clinic and at home testing; home collection for folate deficiency is available in selected states. (See FAQs below for more info).
Your vitamin D test reveals more than just bone health, research suggests it's a window into immune function, mood regulation, and inflammation control.
SpectraCell's cellular micronutrient test promises to reveal nutrient deficiencies that standard blood tests miss by measuring how your cells actually use vitamins and minerals.
A comprehensive assessment that measures multiple essential vitamins and minerals to identify nutrient levels and their associations with health.
Your magnesium test reveals more than just one mineral, it's a window into your muscle function, heart health, and metabolic balance.
Your ferritin level reveals how much iron your body has stored away for future use.
Your B12 test reveals more than just vitamin levels, it's a window into your <a href="https://pubmed.ncbi.nlm.nih.gov/28660890/" rel="nofollow">energy production, nerve health</a>, and long-term cognitive function.
Your vitamin D level reveals more than just bone health - research suggests it may be associated with immune function, mood regulation, and various health outcomes.
Low folate levels can signal increased cancer risk, but the relationship is more complex than just cause and effect.
Your folate levels reveal how well your body produces DNA, makes red blood cells, and supports brain function.
Your ferritin test reveals whether your iron reserves are running on empty or overflowing, but the numbers tell a more complex story than most people realize.
The chemistry behind sparkling water's acidity, its effect on teeth, and what the evidence says about regular consumption.
Dietary nitrates in beetroot are converted to nitric oxide, which may support healthy blood pressure. Here is what the evidence shows about how and when to use it.
A balanced assessment of canola oil's properties for high-heat cooking — smoke point, fatty acid stability, oxidation, and what the research actually shows.
How much sugar honey contains, how it differs from table sugar, and what that means for blood glucose.
Honey contains approximately 17 grams of sugar per tablespoon, primarily fructose and glucose. Here is what that means for your blood sugar and how to track it.
The evidence on beetroot juice and blood pressure, including optimal timing, how much to drink, and the biomarkers worth tracking alongside dietary changes.
