B Complex with Vitamin C.

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.

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 people20 human studies on Vitamin C back this formula, each one cited.
• A mechanism that is settledHow Vitamin C and Thiamin work is settled pharmacology.
• Studied together, not just separatelyVitamin C and Vitamin B12 have been studied together, not only separately.
• Recent work on the recordThe most recent study on this record was published in 2025.
• Serving amount inside the studied rangeEach serving carries 20 mg of Riboflavin, inside the range the published research used.
• A stated daily maintenance amountRiboflavin is here at a daily maintenance amount, which is what a daily supplement is for.
• Why this formatIt is a tablet, so the amount per serving is fixed and it stores well.
• The exact form, describedThe label names its forms exactly: Ascorbic acid, Thiamin hydrochloride, Riboflavin. The record says what each one 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 C 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.
• Interaction screen on the recordEvery active on this label was screened against the interaction record, and the screen is published with it.

The combinations the trials actually measured.

One pairing in this formula has been studied as a combination in human trials. Each finding below is what a named study measured, cited and dated, never written by the brand.

• Folic Acid + Vitamin B12 + Vitamin B6Heart

  In a 2025 network meta-analysis of 16 randomized trials in healthy adults, folic acid taken together with vitamins B6 and B12 lowered blood homocysteine more than any single supplement, with the 1 mg folic acid plus 7.2 mg B6 plus 20 micrograms B12 arm ranked most effective versus placebo (mean difference -1.03 micromol/L, 95% CI -1.71 to -0.36).

  Liu et al., 2025 (Nutrition Reviews)PMID 39960689

  Promising

Findings from trials that studied these actives as a combination. Context for how the actives were tested together, not a statement about any individual and not a claim about this product.

What the trials show about timing.

Time-to-effect windows the engine read from the trial record. Each is a window a named study measured, cited and dated, never written by the brand.

• Vitamin Cwithin 24 hours of a single doseMeasured within a day

  In a randomised crossover trial, 12 healthy adults consumed 101.7 mg of vitamin C as a powder, as raw fruits and vegetables, or as juice, and plasma vitamin C rose after every intake form, with plasma and urinary levels tracked over the 24 hours following the single dose.

  Choi et al., 2025 (Nutrients)PMID 41228404

  Strong
• Thiaminabout 18 to 30 days of restricted intakeBuilds with daily use

  In the controlled depletion study the EFSA reference opinion reviews, restricting thiamin intake to 0.009 to 0.015 mg/MJ for 30 days brought urinary free thiamin excretion from a mean of 0.283 mg/24 h down to undetectable levels by day 18 of the depletion period.

  EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA), 2016 (EFSA Journal)PMID 42006014

  Promising
• Thiaminabout 1 week of renewed intakeBuilds with daily use

  In the same depletion and repletion record the EFSA reference opinion reviews, erythrocyte transketolase activity fell progressively to about 75% of baseline during the 30-day depletion period and returned to its baseline value after 1 week of thiamin repletion.

  EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA), 2016 (EFSA Journal)PMID 42006014

  Promising
• Riboflavinabout 8 weeks of daily intakeBuilds with daily use

  In an intervention the EFSA reference opinion reviews, adults whose baseline riboflavin intake and status were unknown received 5 mg/day of riboflavin for 8 weeks, and haemoglobin concentration, haematocrit and erythrocyte count all rose significantly over that period.

  EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA), 2017 (EFSA Journal)PMID 32625611

  Early
• Vitamin B6about 20 to 40 days to clear after stoppingBuilds with daily use

  An expert consensus on vitamin B6 use, developed by a six-member Delphi panel with a structured evidence-quality assessment, calculated from pharmacokinetic parameters that complete clearance of vitamin B6 from the body takes a washout period of about 20 to 40 days after intake stops.

  Schellack et al., 2025 (Drug Healthc Patient Saf)PMID 40395441

  Early
• Folic Acida median of about 36 weeks of daily intakeBuilds with daily use

  A systematic review and Bayesian meta-analysis drew on 108 articles from 14,002 screened records and modelled blood folate against folic acid intake using one-compartment pharmacokinetic models. Red blood cell folate rose 1.78 fold from baseline to steady state at 375 to 570 ug folic acid per day, and reaching that steady state took a median of 36 weeks, 95% credible interval 27 to 52 weeks. Serum or plasma folate rose 11.6% for every 100 ug per day of folic acid intake, 95% credible interval 8.4 to 14.9.

  Crider et al., 2019 (Nutrients)PMID 30609688

  Strong

Windows measured in the cited trials. Context for how the active behaves over time, not a statement about any individual and not a claim about this product.

How each ingredient usually behaves over time.

10 ingredients, from each one's own page.

• Vitamin CWithin hours

  Blood levels rise within hours and tissue pools fill over days. Collagen-linked changes in skin and gums build over weeks and show as tissue quality, not as a sensation.

  Its own page, the plain answer on timing ↗

• Thiamin

  There is no onset to time in the usual sense. Status markers such as erythrocyte transketolase activity move across weeks, and that is where the change is read.

  Its own page, the plain answer on timing ↗

• RiboflavinWithin hours

  Urine turns bright yellow within hours of the first dose. Status itself, read as red cell glutathione reductase activity, shifts across two to eight weeks.

  Its own page, the plain answer on timing ↗

• Niacin

  Nothing to wait for at everyday amounts. Niacin status shows up on blood work rather than as a sensation. The flush from the nicotinic acid form arrives within 30 minutes.

  Its own page, the plain answer on timing ↗

• Vitamin B6

  Nothing quick. Conversion to the active coenzyme happens within hours, but plasma pyridoxal 5-phosphate takes a couple of weeks to settle at a new level.

  Its own page, the plain answer on timing ↗

• Folic AcidWithin a few hours

  Serum folate climbs within a few hours of a dose and red cell folate takes about eight to twelve weeks to plateau. The change lands on a blood panel, not in how you feel.

  Its own page, the plain answer on timing ↗

How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.

The same ingredient, carried differently.

What each form is, and where it fits in a formula. Measured findings carry the study that reported them.

• Riboflavin

  The free vitamin B2 molecule, an isoalloxazine ring joined to a ribitol sugar chain, supplied as the unmodified crystalline compound with no added salt or phosphate group.

  Fits

  It is the form most panels list simply as riboflavin or vitamin B2.

  Trade-off

  It is intensely yellow and only sparingly water soluble, so it can tint a finished product and tends to resist dissolving cleanly in a liquid or a fast-melt format.

• Nicotinic acid

  The free-acid form of vitamin B3, pyridine-3-carboxylic acid. It is the reference form of niacin, a small water-soluble molecule carrying a bare carboxylic acid group on the pyridine ring.

  Fits

  The long-standing reference form for meeting a vitamin B3 requirement.

  Trade-off

  This is the form behind the familiar warm, tingling skin flush that many people notice soon after a larger dose, a recognized property of the free acid that leads some formulators to reach for an amide or ester instead.

• D-pantothenic acid

  The free acid form of vitamin B5, an amide of pantoic acid and beta-alanine, supplied as a viscous hygroscopic oil or a stabilised liquid rather than a dry salt.

  Fits

  The un-neutralised acid carries no mineral counterion, so it suits liquid drops, syrups and formats where a calcium or sodium salt is not wanted.

  Trade-off

  It is hygroscopic and tends to draw water and turn sticky, which makes it awkward to hold as a dry powder without added stabilisers.

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.