Your cart is empty
This quantity of item cannot be added to the cart
Continue shopping
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00. Product quality is exactly as described."
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Vitamin D3 with Sea-Iodine 5000 IU, 60 Capsules - Life Extension
Vitamin D3 with Sea-Iodine is a daily supplement that supports bone and immune health by delivering vitamin d3 and iodine+, helping you feel steadier and healthier.
Quantity
4+Save 5%
4Save 5%
Verified Authenticity
Money-Back Guarantee
Easy Returns
100% Money back guarantee, no questions asked
Secure Transaction
Vitamin D3 with Sea-Iodine is a daily supplement that supports bone and immune health by delivering vitamin d3 and iodine+, helping you feel steadier and healthier. The main ingredients are vitamin d3 and an iodine+ blend sourced from organic sea algae, delivering a marine twist to everyday nutrition. With Life Extension’s emphasis on quality, you get a trusted brand heritage and a product that’s designed to slot into meals easily.
Available Sizes & Variants:
60 capsules - standard daily dose for adults, easy to swallow with food.
Benefits & Features:
- Supports bone health by aiding calcium transport into bones.
- Promotes immune support with a balanced vitamin d3 intake alongside iodine+, helping you stay steadier.
- Contains sea algae derived iodine+ for a marine sourced nutrient option.
- Easy daily routine when taken with meals, as the formulation is designed to be absorbed with food and fits into most busy lifestyles, helping you stay consistent.
- Quality assurances include Non-GMO and gluten free certifications, giving you confidence in every capsule.
Life Extension has long specialised in targeted daily nutrition, and this dietary supplement blends vitamin d3 with a sea algae derived iodine+ for a marine twist on everyday wellness. The organic sea-Iodine blend keeps things gentle on the gut while supporting a balanced nutrient intake. Non-GMO and gluten free, the capsules are crafted to be taken with meals, aligning with the brand’s commitment to quality and traceable ingredient sourcing. It’s a straightforward way to support your daily health goals.
United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched next working day).
Free shipping on orders over £50 to the UK.
Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 14 days in the same original and unopened packaging. Subject to T&C's.
Welzo is a UK-based health platform. Orders ship from the UK.
Please consult the product packaging for accurate instructions on how to use the product.
| Supplement Facts | ||
| Serving Size: 1 Capsule | ||
| Amount Per Serving | % Daily Value | |
| Vitamin D (as cholecalciferol) | 125 mcg | 1250% |
| Iodine [from Sea-Iodine, Complex Blend (organic kelp and bladderwrack extracts, extracts, potassium iodide)] | 1,000 mcg | 667% |
The Primary Active Ingredient Is: Vitamin D3 (Cholecalciferol)
The Primary Active Ingredient Is: Vitamin D3 (Cholecalciferol) is a fat-soluble vitamin essential for normal physiological function. This variant is vitamin D3 (cholecalciferol) and is provided as the main nutrient in the supplement.
This ingredient comes in a capsule form as the cholecalciferol piece, a widely recognised nutrient used to support health across various body systems.
What Vitamin D3 Does?
Vitamin D3 helps keep immune function and supports bone health by aiding calcium movement into the bone matrix. This nutrient is tied to cognitive function and endothelial health in scientific literature, in line with EFSA and NHS-style guidance.
These roles reflect its normal physiological functions and its contribution to overall well-being when levels are adequate.
This product is not meant to diagnose, treat, cure, or prevent any illness.
Life Extension sits in with Welzo's commitment to top‑quality, well‑supported supplements. The brand is recognised for its marine-based iodine approach via Sea-Iodine and its non‑GMO, gluten‑free formulations, which sits well with our focus on purity and transparency in sourcing. This brand’s heritage in delivering evidence‑based nutrient blends makes Life Extension a credible choice for a product that combines Vitamin D3 with Sea‑Iodine, reinforcing our standard of manufacturing consistency and ingredient integrity.
Our medical team checked Life Extension against other manufacturers, weighing quality controls, ingredient sourcing, and formulation practicality. They concluded that Life Extension’s approach to pairing a robust Vitamin D3 dose with a sea‑based iodine blend shows thoughtful product design and reliability. You can learn more about how we evaluate brands at our medical team and our rigorous testing protocols at our rigorous testing protocols.
In choosing Life Extension for Vitamin D3 with Sea‑Iodine, Welzo commits to a partner that prioritises clarity, consistency and consumer safety, making it a trusted foundation for this supplement family.
Part of the Welzo System™
Test, supplement, enhance, and move, all in one place.
Delivery
24 bought this week
30-Day Money Back Guarantee
GMP Certified Facilities
Third-Party Tested
Vegan & Non-GMO
Rated 4.8/5 by 27,000+ Customers
UKAS Accredited Labs
Free Next-Day Delivery Over £50
Science-Backed Formulations
Frequently Asked Questions
Everything you need to know about this product.
Third Party Tested
Trusted by 200,000+ Customers
Pharmaceutical-Grade Quality
UK-Based Customer Support
Rated Excellent by 26,523+ Reviews
100% Money Back Guarantee