The people it speaks toFieldwork 2024
30.5% of US adults
aged 18 and older slept less than 7 hours on average in a 24-hour period in 2024, in the National Health Interview Survey.
CDC National Center for Health Statistics, 2026Vitamin B12 2500 mcg
Vitamin B12 2500 mcg.
Backed by human trials
Vitamin B12 is the lead active here, studied most for cellular energy production. 6 human studies on Vitamin B12 back this formula, each one cited. Who it fits: skews toward women, adults.
Clinically dosedFull label disclosure
1Active ingredient6Human studies2500 mcgVitamin B12
Verified by IngredientMDHow we read this product
- 01We read the label.
The panel on the left is the one we evaluated, line by line.
- 02Every active, separately.
All 1 actives checked against the clinical evidence: dose, form, and what the research actually shows.
- 03Then the formula as a whole.
Doses, ratios, and how the ingredients work together. That assessment is the verdict above: "Backed by human trials".
- 04Earned, not bought.
The verdict is public and identical whether or not a brand pays. A formula that does not clear the bar gets nothing.
Read by the engine against 2.1 million data points from clinical trials, PubMed and more than a hundred vetted sources. No individual reviewer is named or implied.
The receipts
6
Human studies
2500 mcg
Vitamin B12
3 mg per serving clears the studied 250 mcg minimum
Vitamin B12, NIH ODS + Allen 2009 B12 review
Cross-checked against 54 documented interactions for these actives.
Read the evidenceVitamin B12, the evidence →
Inside the formula
In context
The gap this formula speaks to.
Public health figures the engine matched to this formula's ingredients. Reported by their source, cited and dated, never written by the brand.
The people it speaks toFieldwork 2024
54.8% of US adults
aged 18 and older woke up feeling well rested most days or every day in 2024, in the National Health Interview Survey.
CDC National Center for Health Statistics, 2026The people it speaks toFieldwork 2023
64% of US adults
aged 16 and older consumed caffeinated beverages daily, according to a Sleep Foundation survey fielded in 2023.
Sleep Foundation, 2023The people it speaks toFieldwork 2011 to 2016
59% of US adults
aged 20 and older consumed coffee on a given day, in the National Health and Nutrition Examination Survey fielded from 2011 to 2016.
NHANES, Centers for Disease Control and Prevention, 2020The people it speaks toFieldwork 2024
19.5% of US adults aged 18 to 34
reported frequent fatigue, feeling very tired or exhausted most days or every day over the past three months, in the 2024 National Health Interview Survey.
CDC National Center for Health Statistics, 2026Daily usePublished 2024
59 to 66 days
was the median time it took adults to make a new daily health habit automatic across the studies a 2024 review pooled, with individuals ranging from 4 to 335 days.
Systematic review and meta-analysis, 20245 more
61% to 74%
About 61 to 74 percent of adults refilling a long-term medicine on their own stopped within a year, versus 33 to 44 percent on one set pickup day.
Cohort study, 2015USDA advises fortified foods or supplements after 50
In its national intake tables USDA notes that "it is advised that individuals over 50 meet their B12 requirement with fortified foods or supplements".
NHANESSystematic review, 2025
Reviews reported immune-cell and immune-marker changes alongside vitamin B12 repletion in adults whose B12 absorption is impaired. The outcomes summarised are markers, and the review names cyanocobalamin among the preparations used rather than isolating it.
Oxidative Medicine and Cellular LongevityOpen-label trial, 2024
A study measured how oral vitamin B12 absorption changes with dose in healthy adults, explaining why higher oral doses work once the usual route saturates.
NutrientsKashyap et al., 2024 (Nutrients)PMID 39683551
Open-label trial, 2022
After cyanocobalamin supplementation the authors detected no association between serum vitamin B12 and the nocturnal sleep parameters measured. This is a failure to detect a relationship, not a demonstration that none exists.
HeliyonChanner-Wallen et al., 2022 (Heliyon)PMID 35146159
Population figures from public health data. Context for the category, not a statement about any individual and not a claim about this product.
Every one of these is a fact the engine could ground.
Each line below was derived from this formula's own record at the time of verification. Nothing here was written by the brand, and nothing can be added that the evidence does not carry.
- Studied in people6 human studies on Vitamin B12 back this formula, each one cited.
- A mechanism that is settledHow Vitamin B12 works is settled pharmacology.
- Why this formatIt is a tablet, so the amount per serving is fixed and it stores well.
- The exact form, describedThe form on the label is Cyanocobalamin. The record says what that form is and what it suits.
- Full label disclosureEvery ingredient on this label carries its own declared amount.
- Where it comes from and how it is madeVitamin B12 is made by fermentation.
- Positions this formula already qualifies forThis formula already qualifies for positions beyond the one it is sold into, on the evidence it carries.
- A position nobody is holding yetSome of those positions are ones almost nobody is selling to yet.
How each ingredient usually behaves over time.
One ingredient, from its own page.
- Vitamin B12
Blood markers move within a week or two. Red cell size takes roughly six to eight weeks to settle, and how you feel tends to follow the markers.
How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.
Chemical form
The same ingredient, carried differently.
What each form is, and where it fits in a formula. Measured findings carry the study that reported them.
- Cyanocobalamin
A corrinoid with a cyanide group occupying the upper axial position on the cobalt atom, added during purification to give a single crystalline species.
- Fits
- Oral tablets, sublingual lozenges, gummies, fortified foods and injectable solutions, because the cyano ligand gives the molecule stability to light and heat during processing and storage.
- Trade-off
- The cyano ligand has to be removed and the cobalt reduced before the molecule can act as a cofactor, and that ligand is cleared renally.
Descriptions of the form itself, read from the cited studies. Not a comparison between products and not a statement about any individual.
Tablet
It is a tablet, so the amount per serving is fixed and it stores well.
Best forHigh-dose minerals and anything needing timed or delayed release.
Questions shoppers ask
- Is Vitamin B12 2500 mcg independently verified?
- Yes. IngredientMD reviewed this formula independently and verified it in Oct 2026. The verdict is earned, not bought: brands can't edit or purchase it.
- What's in Vitamin B12 2500 mcg?
- Vitamin B12 2500 mcg is built on Vitamin B12. Each ingredient links to its own evidence page on IngredientMD.
- Were ingredient interactions checked?
- Yes. The combination was screened against 54 documented interactions for these actives in IngredientMD's interaction database.
- Who is IngredientMD?
- IngredientMD is an independent supplement-science platform. We analyze ingredients and formulas against clinical research, and we verify products only when they clear our bar. Labs run the tests. We review the results.
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These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This record is not medical advice. Always consult your healthcare provider before starting any supplement regimen.
Independent review by IngredientMD, not commissioned by Spring ValleyWork at Spring Valley? This verification is yours to claim →