Menadione Sodium Bisulfite.
Research-backed compound with potential health benefits. Provides vitamin K activity. Not safe for human supplementation.
Reviewed March 2026
- Category
- Compound
What Menadione Sodium Bisulfite is, and what it does.
- Does it work
- This is a water-dispersible vitamin K source used in animal feed and fortified premixes. Human formulas use vitamin K1 or the K2 menaquinones instead.
- How much to take
- The record holds a 1 to 5mg daily band. In practice this form sits in feed and premix formulation, where the formulator sets the level rather than a person choosing a serving.
- Time to feel it
- This is not an ingredient with an onset you would track. Vitamin K activity registers on a clotting-time measurement, not in how a day feels.
- The first dose
- Nothing you would sense on day one. Vitamin K activity is read on a clotting-time measurement, and that does not move within a day of a small amount.
- With regular use
- Tissue enzymes attach a side chain to it to make menaquinone-4, which supports carboxylation of vitamin K dependent proteins. That is a biochemical role rather than a felt one.
- How well tolerated
- Generally considered well tolerated at normal doses.
- How it feels
- There is no subjective experience attached to it. It is a formulation-grade vitamin K source whose work is enzymatic and shows up in laboratory measurements.
- The overlooked benefit
- The bisulfite adduct is what makes a fat-soluble molecule disperse in water, which is why this form appears in water-based premixes rather than oil capsules.
1 to 5mg a day is where Menadione Sodium Bisulfite works.
Source: EFSA Panel on Food Additives, 2014; veterinary K3 literature
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Menadione Sodium Bisulfite is documented in the library; the clinical read is in the queue. Nothing about the strength of the research prints until the read is done.
- conversion to menaquinone-4 in tissueIn vitro study
- vitamin K activity in animal nutritionAnimal study
- redox cycling and superoxide generationIn vitro study
- depletion of reduced glutathione by thiol arylationIn vitro study
- two-electron detoxification by NAD(P)H quinone oxidoreductase 1In vitro study
Questions people ask about Menadione Sodium Bisulfite.
- When should I take it?
- Timing matters less than consistency. Pick a time that works for you and take it daily.
- Can I take it with other supplements?
- Usually fine. The main thing to watch is not doubling up on the same ingredient from different products. If you're on prescription meds, check with your pharmacist first.
- Any side effects to watch for?
- Most people tolerate it well at recommended doses. GI upset is the most common complaint with any supplement. Start with a lower dose and work up. If something feels off, stop and reassess.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
In cultured cells, selenium supplementation reduced the oxidative stress and cytotoxicity produced by a combination that included this quinone, which is consistent with selenoenzymes such as thioredoxin reductase and glutathione peroxidase absorbing the peroxide load that quinone redox cycling generates. The observation is in vitro and in cell lines, not in people. Read it as mechanistic, not as a dosing instruction.
NAD(P)H quinone oxidoreductase 1 is a flavoprotein and requires FAD, which the body makes from riboflavin. That enzyme reduces quinones by two electrons straight to the hydroquinone, skipping the semiquinone that redox cycles with oxygen. Riboflavin status therefore sits upstream of how a quinone is handled, which is settled cofactor biochemistry.
Menadione arylates thiols, forming a conjugate with the cysteine sulfhydryl of glutathione, and glutathione S-transferases accelerate that reaction. The consequence is consumption of the reduced glutathione pool in proportion to quinone exposure. This is established quinone toxicology and it is the reason thiol status and quinone dosing are discussed together.
N-acetylcysteine supplies cysteine, the rate-limiting substrate for glutathione synthesis, and cysteine thiols also conjugate quinones directly. Both routes place NAC opposite the thiol-depleting side of quinone chemistry. The relationship is established from cell and animal work rather than from any human study of this specific compound.
Ascorbate reduces quinones to semiquinones, which reoxidise against molecular oxygen and generate superoxide and then hydrogen peroxide. This ascorbate-quinone couple is a standard laboratory method for generating controlled oxidative stress in cell culture, so the pairing is a documented pro-oxidant combination rather than an antioxidant one. That is chemistry worth stating plainly, not a recommendation.
Alpha-tocopherol terminates lipid peroxidation chains inside membranes, which is where the downstream damage from quinone redox cycling shows up. It does not stop the cycling itself, only the propagation that follows. The relationship is established lipid chemistry, characterised in membranes and cell systems.
Menadione is the side-chain-free vitamin K nucleus and tissues attach a geranylgeranyl chain to it through UBIAD1, producing menaquinone-4. MK-7 is already a complete menaquinone and needs no such step. Both therefore end up supporting the same gamma-glutamyl carboxylase reaction, by different routes and with very different pharmacokinetics.
Phylloquinone can also be dealkylated to menadione in the gut and then reconverted to MK-4 in tissue, which is the pathway that links a dietary K1 intake to tissue MK-4. That makes menadione a shared intermediate rather than a separate vitamin. Anyone whose total vitamin K intake is being managed should count all three vitamers.
Dihydrolipoic acid regenerates reduced glutathione and ascorbate and is itself a dithiol, so it sits on the replenishment side of the thiol pool that quinone conjugation drains. The relationship comes from cell and animal redox work. No human data addresses this pairing.
Both molecules are quinones and both cycle between quinone, semiquinone and quinol states, but ubiquinone carries a long isoprenoid tail that anchors it in membranes and it operates within an ordered electron transport chain. Menadione has no such tail and reduces indiscriminately. The comparison is instructive about quinone chemistry rather than evidence of a useful combination.
Nothing specific on file for Menadione Sodium Bisulfite. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Menadione Sodium Bisulfite actually does.
Menadione is 2-methyl-1,4-naphthoquinone, the vitamin K nucleus without an isoprenoid side chain, so it is not itself a functional vitamer until a chain is attached.
UBIAD1 in tissue transfers a geranylgeranyl group to menadione to form menaquinone-4, which then supports the gamma-glutamyl carboxylase reaction that carboxylates vitamin K dependent proteins.
Sodium bisulfite adds across one of the quinone carbonyls to give a water-soluble sulfonate adduct; the adduct dissociates in aqueous solution to release menadione, which is how a fat-soluble molecule is delivered in a water-dispersible premix.
One-electron reduction of menadione by NADPH-cytochrome P450 reductase produces the semiquinone radical, which transfers its electron to molecular oxygen and regenerates the quinone, yielding superoxide in a continuing cycle.
Where Menadione Sodium Bisulfite comes from.
It is made in a factory, not extracted from a plant. A petroleum-derived chemical is oxidised into the vitamin K core, then reacted with a sulfite salt so it dissolves in water instead of only in fat.
Chemically synthesised. The molecule is identical to the one a plant or an animal makes, and building it deliberately means a known purity, a fixed dose and no crop contaminants. For several nutrients this is the only route that reaches a usable amount.
A petrochemical aromatic obtained from coal tar or refinery streams. This is the standard starting material for the menadione ring system.
The methylnaphthalene is oxidised, historically with chromic acid and in newer processes with hydrogen peroxide or air over a catalyst, giving 2-methyl-1,4-naphthoquinone.
Sodium bisulfite adds across a quinone carbonyl in aqueous solution to give the water-soluble sulfonate adduct. Adding excess bisulfite instead yields the complex (MSBC); substituting nicotinamide yields MNB.
The adduct is crystallised out, washed and dried under controlled low humidity because the crystals take up water readily.
Batches are assayed for menadione as the declared active, since the adducts differ in how much menadione they carry per gram. Chromium residue limits apply where the older oxidation route was used.
The dried salt is blended with a carrier and often coated for stability, then supplied as a premix component.
Getting Menadione Sodium Bisulfite from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- In cultured cell lines, selenium supplementation reduced the oxidative stress and cytotoxicity produced by the tested quinone-containing combination.In vitro study. Gencheva et al., 2025 (Free Radical Biology and Medicine). PMID 40180024 ↗
- Hesperetin, but not ellagic acid, increased myosin heavy chain expression and cell fusion in cultured myoblasts; this compound appears within the experimental culture conditions rather than as the tested variable.In vitro study. Cuijpers et al., 2024 (Frontiers in Nutrition). PMID 39285862 ↗
These are the studies our verdict leans on, chosen from the 2 we read for Menadione Sodium Bisulfite. The full linked list is below.
Problems people have reported.
Read this carefully. These are 115 voluntary, unverified reactions reported to the FDA (openFDA). The number mostly reflects how popular Menadione Sodium Bisulfite is, not how risky it is. A report is not proof Menadione Sodium Bisulfite caused anything. It is a signal of what to watch for, nothing more.
Source: openFDA adverse-event reports. Voluntary reporting, not an incidence rate.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.