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Vitamin D3
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  • Vitamin D3
  • Vitamin D3
  • Vitamin D3
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Vitamin D3

Vitamin D3 10,000IU

Pack Size
In stock
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Vitamin D3
120 Capsules

90 Day Money Back Guarantee

Tracked and Insured

Stronger Bones
Stronger Bones
Antioxidant Support
Antioxidant Support
Capsule Size
100mg
Daily Dose
1 Capsule
Shelf Life
2 Years
Ingredients per capsule
Vitamin D3 10,000IU
NO Artificial Ingredients, Wheat, Gluten, Yeast, Soy, Corn, Dairy or Preservatives.
Third Party Test Report
  • Highest Purity
  • 3rd Party Tested
  • 90 Day Guarantee

What are Vitamin D3 Supplements?

Vitamin D3 supplements contain cholecalciferol, a form of vitamin D that is produced in the skin when exposed to sunlight. These supplements are taken to ensure adequate levels of vitamin D in the body, which is essential for maintaining healthy bones and teeth, supporting the immune system, and facilitating the absorption of calcium and phosphorus. Vitamin D3 is particularly important for individuals with limited sun exposure or those looking to maintain optimal daily levels.

The Science Behind Vitamin D3 Supplements

Vitamin D3 supplements provide cholecalciferol, the form of vitamin D produced by skin in sunlight. Once ingested, it is converted to calcidiol in the liver and then to calcitriol in the kidneys, the active form of vitamin D. Calcitriol regulates calcium and phosphorus levels, promoting their absorption from the gut, essential for bone health, muscle function, and immune support. Supplements help maintain optimal levels, especially for those with limited sun exposure or indoor lifestyles.

Vitamin D3
Benefits

  • Improves Bone Health

    Enhances calcium absorption in the intestines, which promotes strong and healthy bones, supporting bone density and structural integrity.

  • Supports Immune Function

    Boosts the immune system by modulating the innate and adaptive immune responses, supporting the body’s natural defenses and maintaining a healthy immune response.

  • Enhances Muscle Function

    Contributes to muscle strength and performance, which in turn supports physical stability, coordination, and active living.

  • Promotes Cardiovascular Health

    Supports heart health by helping to regulate blood pressure and supporting overall heart function and maintaining a healthy cardiovascular system.

  • Boosts Mood & Mental Health

    Vitamin D receptors are located in areas of the brain involved in mood regulation, playing a key role in supporting emotional well-being and cognitive function.

  • Supports General Wellness

    Supports long-term vitality by maintaining proper cellular function and supporting the body's physiological processes for overall health.

How Vitamin D3 Works

1

Synthesis and Conversion

When Vitamin D3 (cholecalciferol) is taken as a supplement or produced by the skin in response to sunlight, it is first absorbed into the bloodstream. From there, it travels to the liver, where it is converted into calcidiol (25-hydroxyvitamin D). This conversion is crucial as calcidiol is the primary circulating form of vitamin D.

2

Activation

The calcidiol is then transported to the kidneys, where it undergoes a second conversion to become calcitriol (1,25-dihydroxyvitamin D), the active form of vitamin D. Calcitriol acts as a hormone, binding to vitamin D receptors in various tissues throughout the body. This active form is essential for exerting the biological effects of vitamin D.

3

Regulation and Function

Calcitriol regulates calcium and phosphorus levels in the blood by increasing their absorption from the intestine, promoting bone mineralization, and ensuring proper muscle function. Additionally, it modulates the immune system, supporting a balanced immune response and enhancing the body's natural functions.

Highest Quality Supplements

  • No Artificial Color
  • No Artificial Flavor
  • No Artificial Sweetener
  • No Gluten
  • No Soy
  • Non-GMO
  • No Dairy

Questions, anyone?

Need help with something? Here are our most frequently asked questions.

  • What is Vitamin D3 and how does it work?

    Vitamin D3 (Cholecalciferol) is a fat-soluble vitamin naturally produced by the body when the skin is exposed to sunlight, often referred to as the "sunshine vitamin." Vitamin D3 is the same form produced naturally by the body, making it the preferred form for supplementation. It is essential for the absorption of calcium and phosphorus, which are vital for maintaining healthy bones and teeth. As we age or spend more time indoors, our natural Vitamin D levels may decline. Supplementation helps maintain these levels, supporting bone health, muscle function, and the immune system.


  • What are the benefits of taking Vitamin D3 supplements?

    Vitamin D3 is scientifically proven to support several key bodily functions. It contributes to:

    • The maintenance of normal bones and teeth by aiding the absorption of calcium and phosphorus.
    • The normal function of the immune system.
    • The maintenance of normal muscle function.
    • Normal blood calcium levels.
    • ** The process of cell division.**

  • How long does it take to see the effects of Vitamin D3?

    The time it takes to notice the benefits of Vitamin D3 varies by individual and depends on starting levels. While Vitamin D begins working immediately to support calcium absorption, physical benefits such as maintaining bone density and immune function are cumulative. Consistent daily use is key to maintaining optimal Vitamin D levels year-round, particularly during the autumn and winter months when sunlight exposure is naturally lower.

  • Are Vitamin D3 supplements tested for purity and quality?

    Yes, at The Longevity Store, all our Vitamin D3 supplements undergo rigorous testing in certified labs to ensure they meet the highest standards of purity and quality. Our Vitamin D3 is formulated for high bioavailability to ensure effective absorption. This testing ensures that you are receiving a high-quality product free from harmful additives or contaminants.

  • Are there any side effects of taking Vitamin D3?

    Vitamin D3 is generally well-tolerated when taken at recommended dosages. Adverse effects are rare and are typically associated with excessive intake. It is important to follow the recommended daily allowance provided on the product label. If you have any concerns or experience any unexpected effects, please discontinue use and consult your healthcare provider.

  • Can I take Vitamin D3 with other supplements or medications?

    Vitamin D3 is frequently taken alongside other supplements, such as Vitamin K2 and Magnesium, which work synergistically to support bone health. However, if you are taking prescription medications (such as corticosteroids) or have a specific medical condition, it is strictly recommended to consult with your doctor or pharmacist before starting supplementation to ensure there are no potential interactions.

Customers praised this supplement for supporting energy, mood, immunity, and bone health, especially during British winters with limited sunlight. Shoppers said "Essential for British winters" and it's "Sunshine in a capsule." Many reported improved energy levels, reduced muscle aches, and better mood stability during darker months.

  • 5 stars: 11 (55%)
  • 4 stars: 6 (30%)
  • 3 stars: 3 (15%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
S
Sam F.

Essential for British winters.

A
Albie

Living in Manchester means barely any sun. These have fixed my energy and mood right up.

A
Alex E.

Bones feel so much stronger.

O
Otis

Was constantly tired and achey during darker months. Vitamin D3's made a massive difference to how I feel.

M
Morgan D.

Immunity's been great this year.

J
Jasper

Doctor tested my levels and they were in the floor. Few months on D3 and I feel like a new person.

J
Jamie C.

Perfect for our terrible weather.

F
Felix

Mood used to plummet every October. Taking this daily and I'm actually enjoying winter for once.

R
Rowan B.

Muscles don't ache as much now.

P
Percy

Office job means I barely see daylight. This keeps my vitamin D topped up properly.

S
Sam A.

Sunshine in a capsule, basically.

W
Wilbur

Was getting every cold going until I started D3. Immune system's holding up beautifully now.

A
Alex Z.

Energy levels have properly lifted.

S
Stanley

Mom's osteoporosis had me worried about my own bones. Taking this for prevention and feeling good about it.

M
Morgan Y.

Great for overall wellbeing.

S
Sidney

Scottish winters are brutal for vitamin D. This has kept my mood stable and energy consistent.

J
Jamie X.

Feeling stronger and more balanced.

B
Barnaby

Heart health runs in the family so I'm proactive. D3 alongside healthy eating feels like solid support.

R
Rowan W.

No more winter blues.

M
Monty

As someone who works indoors and lives in the UK, vitamin D3 is non negotiable. Bones, immunity, mood, energy, everything's better when my levels are sorted. Taking it year round now.

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