The Solgar Vitamin K1 (Phytomenadione) 100 µg is a dietary supplement in tablets, with 100 µg of vitamin K1 per tablet, a quantity that covers 133% of the Recommended Daily Allowance. The package contains 100 tablets, which is approximately three months of use with one tablet per day.
It is aimed at adults who want a steady, measured intake of vitamin K1 in a mono-ingredient form. It is of interest to those who eat few leafy green vegetables, such as spinach, broccoli, cabbage and lettuce, which are the main dietary sources of it, as well as those who monitor their bone health along with calcium and vitamin D.
The letter K describes a group of fat-soluble compounds with a common structural core. K1, phylloquinone or phytomenadione, is the form found in plants and especially in green leaves, where it participates in photosynthesis. K2, menaquinones, is produced by bacteria, among others by the intestinal microbiota. K3 is a synthetic form and is not used in dietary supplements. This product contains exclusively K1.
The reason vitamin K is essential has to do with a very specific chemical reaction. It acts as a cofactor of the enzyme that adds a carboxyl group to certain proteins, a process called gamma-carboxylation. Without this step, the proteins remain inactive. On the liver side, these proteins are blood clotting factors. On the bone side, the main protein dependent on vitamin K is osteocalcin, which binds calcium within the bone matrix. This explains the two approved claims of the vitamin.
According to the product presentation by Solgar itself, vitamin K1 is fat-soluble and distinct from other forms of vitamin K. The company states that the product contributes:
The manufacturer's page also states that vitamin K activates calcitonin. The bone protein dependent on vitamin K is actually osteocalcin, so this wording is attributed to the manufacturer and is not repeated as substantiated. The above statements are attributed to the manufacturer and the first two correspond to approved health claims.
With 100 µg per tablet, that is 133% of the Recommended Daily Allowance, the product meets the requirement for the significant amount for the approved claims of vitamin K:
These are the only two. References to treatment or prevention of osteoporosis, vascular occlusions or bleeding conditions are not allowed and are not made here. The tablet is declared by the manufacturer as vegan, gluten-free, lactose-free and kosher.
It suits adults with a low intake of leafy green vegetables, which are the main source of K1 in the diet. It is of interest to those who already take calcium and vitamin D and want to supplement their regimen with vitamin K. It is an option for those who prefer mono-ingredient formulations with a clear dose, as well as those who have discussed vitamin K intake with their doctor or pharmacist.
The product is a dietary supplement. It does not replace a medical diagnosis, monitoring or treatment. Osteoporosis and any clotting disorder require a doctor's diagnosis and monitoring.
Main ingredients: per 1 tablet, Vitamin K1 (as phytomenadione) 100 µg (133% DV).
Other ingredients: Diluents (dibasic calcium phosphate, microcrystalline cellulose, mannitol), phytomenadione, anti-caking agents (vegetable stearic acid, vegetable stearic magnesium), xanthan gum.
Free of: sugar, salt, starch, yeast, wheat, soy, gluten, dairy, preservatives, artificial flavors or colors. The manufacturer declares the product vegan, lactose-free and kosher.
Form: tablets
Recommended dosage: 1 tablet per day, preferably with meals.
With one tablet per day, the 100-tablet package is sufficient for about 100 days of use, or a little over three months. Since vitamin K is fat-soluble, taking it with a meal containing fat helps absorption. Do not exceed the recommended daily dosage. Dietary supplements should not be used as a substitute for a balanced diet.
Caution, all forms of vitamin K interact with coumarin anticoagulants, such as warfarin and acenocoumarol. If you are on such treatment, do not start the product without your doctor's consent. If you are pregnant or breastfeeding, if you are taking other medication or if you have a health condition, consult your doctor or pharmacist. Keep the product in a cool, dry place, out of reach of children.
Each tablet contains 100 µg of phytomenadione, which is 133% of the Recommended Daily Allowance.
K1 comes from plants, mainly from leafy green vegetables, while K2 are menaquinones of bacterial origin. This product contains exclusively K1.
No, without medical advice. Vitamin K directly interacts with coumarin anticoagulants and can affect the adjustment of the treatment.
Preferably yes. It is a fat-soluble vitamin and the presence of fat in the meal helps its absorption.
The combination is common in bone formulas. Inform your pharmacist of all supplements you are taking.
Yes, according to the manufacturer's certifications, which declare the product vegan, gluten-free and lactose-free.
No. The only allowed claim is that vitamin K contributes to the maintenance of normal bone condition. Osteoporosis requires medical monitoring.
With one tablet per day it covers about 100 days, or a little over three months.
* Health claims approved under Regulation (EC) 1924/2006. The product is not intended for the prevention, treatment or diagnosis of a human disease.
Main ingredients: per 1 tablet, Vitamin K1 (as phytomenadione) 100 µg (133% RDI).
Other ingredients: Diluents (dibasic phosphate, microcrystalline cellulose, mannitol), phytomenadione, anti-caking agents (phytic fatty acid, magnesium stearate), cellulose gum.
Free from: sugar, salt, starch, yeast, wheat, soy, gluten, dairy, preservatives, artificial flavors or colors. The producer declares the product vegan, lactose-free and kosher.
Form: tablets
Recommended dosage: 1 tablet daily, preferably with meals.
With one tablet per day, the pack of 100 tablets lasts for about 100 days of use. Since vitamin K is fat-soluble, taking it with a meal containing fat helps absorption. Do not exceed the recommended daily dosage. Dietary supplements should not be used as a substitute for a balanced diet.
Caution, all forms of vitamin K interact with coumarin anticoagulants, such as warfarin and acenocoumarol. If you are taking such medication, do not start the product without your doctor's approval. If you are pregnant or breastfeeding, if you are taking other medication or if you have any health issues, consult your doctor or pharmacist. Keep the product in a cool and dry place, out of reach of children.
