Life Extension Vitamins D and K with Sea-Iodine - 60 Capsules
Life Extension Vitamins D and K with Sea-Iodine - 60 Capsules
Life Extension Vitamins D and K with Sea-Iodine combines 125 µg (5,000 IU) of vitamin D3, 2,100 µg of vitamin K across three forms, and 1,000 µg of iodine from the Sea-Iodine™ complex in a single once-daily capsule, 60 capsules per bottle.
This is a high-strength formula. Each nutrient is dosed well above typical one-a-day levels: vitamin D3 at 2500% NRV, vitamin K at 2800% NRV and iodine at 667% NRV. It is aimed at adults who specifically want higher intakes of these three nutrients in one capsule rather than a general-purpose multivitamin dose. If you are not sure whether a high-strength formula is right for you, speak to your GP or pharmacist first, particularly regarding vitamin D blood levels and thyroid considerations noted in the advisory below.
At a glance
Type: Food supplement, combined vitamin D3, vitamin K and iodine capsule
Vitamin D3: 125 µg (5,000 IU) as cholecalciferol per capsule (2500% NRV)
Vitamin K: 2,100 µg total, from vitamin K1 (1,000 µg), K2 as menaquinone-4 (1,000 µg) and K2 as trans menaquinone-7 (100 µg) (2800% NRV)
Iodine: 1,000 µg from Sea-Iodine™ complex, organic kelp and bladderwrack extracts plus potassium iodide (667% NRV)
Format: 60 capsules, vegetable cellulose shell, one capsule daily with food
Regulatory status: Food supplement for the Irish market (FSAI framework), not a medicine
Delivery: Ships from Dublin, free delivery in Ireland on orders over €75
Supplement Facts
| Per 1 capsule | Amount | % NRV |
|---|---|---|
| Vitamin D3 (as cholecalciferol) | 125 µg (5,000 IU) | 2500% |
| Vitamin K activity, total | 2,100 µg | 2800% |
| — Vitamin K1 (as phytonadione) | 1,000 µg | – |
| — Vitamin K2 (as menaquinone-4) | 1,000 µg | – |
| — Vitamin K2 (as trans menaquinone-7) | 100 µg | – |
| Iodine (from Sea-Iodine™ Complex Blend: organic kelp and bladderwrack extracts, potassium iodide) | 1,000 µg | 667% |
Ingredients: microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, food starch-modified, dicalcium phosphate, stearic acid, silica. Non-GMO. NRV = Nutrient Reference Value.
Key features
- 125 µg (5,000 IU) vitamin D3 as cholecalciferol, the form produced in skin on sun exposure
- Three forms of vitamin K in one capsule: K1 (phytonadione), K2 as menaquinone-4 and K2 as trans menaquinone-7
- 1,000 µg iodine from a marine-sourced complex of organic kelp and bladderwrack extracts with potassium iodide
- One capsule daily, taken with food
- Vegetable cellulose capsule shell, non-GMO, gluten free per the manufacturer label
- Ships next-day from Dublin, no customs charges for Irish customers
Authorised health claims for the nutrients in this product
Vitamin D contributes to the normal function of the immune system, the maintenance of normal bones, the maintenance of normal muscle function and normal absorption/utilisation of calcium and phosphorus.
Vitamin K contributes to normal blood clotting and to the maintenance of normal bones.
Iodine contributes to the normal production of thyroid hormones and normal thyroid function, to normal cognitive function, to normal functioning of the nervous system and to normal energy-yielding metabolism.
These are authorised claims under EU Regulation 1924/2006, relating to the named nutrients. No health claim is made for kelp or bladderwrack extracts themselves; the iodine claims relate to the iodine they supply.
How to take
Adults 18+: take one (1) capsule once daily with food, or as recommended by a healthcare practitioner. Vitamins D and K are fat-soluble, so taking the capsule with a meal that contains some fat supports absorption. Do not exceed the recommended daily dose. Do not combine with other vitamin D, vitamin K or iodine supplements unless advised by a healthcare practitioner.
Frequently asked questions
What is Life Extension Vitamins D and K with Sea-Iodine?
It is a food supplement from Life Extension that combines three nutrients in one once-daily capsule: vitamin D3 (125 µg / 5,000 IU), vitamin K (2,100 µg across K1, K2 MK-4 and K2 MK-7) and iodine (1,000 µg from the Sea-Iodine™ complex). Each bottle contains 60 capsules, a two-month supply at one capsule per day.
How much vitamin D3 is in each capsule?
Each capsule contains 125 µg of vitamin D3 as cholecalciferol, equivalent to 5,000 IU. That is 2500% of the EU Nutrient Reference Value. This is a high-strength dose; if you already take vitamin D from another supplement or fortified foods, count your total daily intake across all sources.
Which forms of vitamin K does it contain?
Three forms totalling 2,100 µg of vitamin K activity per capsule: 1,000 µg of vitamin K1 (phytonadione), 1,000 µg of vitamin K2 as menaquinone-4 (MK-4), and 100 µg of vitamin K2 as trans menaquinone-7 (MK-7). K1 is the form found mainly in green leafy vegetables; the K2 menaquinones are found in fermented foods and some animal foods.
What is Sea-Iodine and how much iodine does it provide?
Sea-Iodine™ is Life Extension’s marine iodine complex, made from organic kelp and bladderwrack extracts together with potassium iodide. Each capsule supplies 1,000 µg of iodine, which is 667% of the EU Nutrient Reference Value of 150 µg. This is a high iodine intake; see the precautions below regarding thyroid conditions.
What does vitamin D do?
Under EU Regulation 1924/2006, vitamin D contributes to the normal function of the immune system, the maintenance of normal bones and teeth, the maintenance of normal muscle function, normal absorption and utilisation of calcium and phosphorus, and normal blood calcium levels.
What does iodine do?
Under EU Regulation 1924/2006, iodine contributes to the normal production of thyroid hormones and normal thyroid function, normal cognitive function, normal functioning of the nervous system, normal energy-yielding metabolism and the maintenance of normal skin.
Is it suitable for vegetarians?
The capsule shell is vegetable cellulose and the manufacturer label lists no animal-derived ingredients. Vitamin D3 (cholecalciferol) in supplements can be sourced from lanolin or from lichen; the manufacturer label does not state the source, so we do not describe this product as vegan. If the D3 source matters to you, contact us before ordering and we will confirm against the batch on hand.
How do I take it?
One capsule once daily with food. Vitamins D and K are fat-soluble, so a meal containing some fat supports absorption. Do not exceed one capsule per day. A bottle of 60 capsules lasts two months.
Who should check with a doctor before taking this?
Speak to your GP or pharmacist first if you have a thyroid condition or take antithyroid medication, if you take a vitamin K antagonist such as warfarin or another anticoagulant, if you have high blood calcium levels, or if you are pregnant or breastfeeding. If your total vitamin D intake from all sources exceeds 50 µg (2,000 IU) per day, periodic blood testing of vitamin D levels is advisable. Do not combine this product with other iodine-containing supplements.
Do you deliver in Ireland and will I pay customs?
Yes. Orders ship from our Dublin warehouse by DPD with next-day dispatch, and delivery in Ireland is free on orders over €75. Because your order ships from within Ireland, there are no customs charges or import fees.
Life Extension · Vitamins D and K with Sea-Iodine™ · 60 capsules · one capsule daily · vegetable cellulose capsule · Probiotic.ie is an authorised retailer of Life Extension products in Ireland.
Advisory information (Ireland)
Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. This is a high-strength formula: do not exceed the recommended daily dose of one capsule, and do not combine with other vitamin D, vitamin K or iodine supplements unless advised by a healthcare practitioner. If you have a thyroid condition or are taking antithyroid medication, do not use without consulting your healthcare practitioner. If you are taking a vitamin K antagonist (for example warfarin) or another anticoagulant, consult your healthcare practitioner before use. Vitamin D supplementation is not recommended for individuals with high blood calcium levels; individuals consuming more than 50 µg (2,000 IU) of vitamin D per day from all sources should periodically obtain a serum 25-hydroxy vitamin D measurement. If you are pregnant, breastfeeding or taking any medication, consult your healthcare practitioner before use. For adults 18 years and over. Keep out of reach of children. Do not use if the outer seal is broken or damaged. Store in a cool, dry place. This product is a food supplement, not a medicine. Food supplements in Ireland are regulated under the food supplements framework overseen by the FSAI.