Vitamin D 1000iu Optimum Strength
⏳ 12 months supply per pack (365 tablets)
Get your daily dose of sunshine and embrace vitality with our all-natural Vitamin D supplement that's designed to supercharge immunity, bone health and mood.
Vitamin D 1000iu Optimum Strength
Nutrition Geeks works with accredited, independent laboratories to verify the label accuracy and quality of its products.
- Vitamin D3 Meets Label Claim 25µg/serving (1000iu)
TEST DATED SEP 18, 2026
Testing conducted by Marfleet Analytical Services
Results reflect laboratory analysis of submitted samples at the time of testing as reported by the testing laboratory. Results do not guarantee future performance, stability, or shelf life. Product labeling and regulatory compliance remain the responsibility of the brand.
☀️ Supercharge Your Immune System
Elevate your body's defence system with a daily dose of sunshine. Our Vitamin D3 is like a burst of sunlight in tablet form, empowering your immune response to keep you healthy and resilient.
🦴 Strengthen Bones
Vitamin D3 is essential for maintaining strong bones, keeping you active and healthy.
💪 Support Muscle Function
Vitamin D3 isn't just for bones; it also plays a crucial role in muscle function, supporting your active lifestyle and helping you stay fit and toned.
😁 Maintain Healthy Teeth
Keep your smile strong and bright. Vitamin D3 aids in the maintenance of tooth integrity, giving you another reason to show off your pearly whites.
💊 NHS Recommended
The NHS recommends that everyone should consider taking a daily vitamin D supplement, especially during the autumn and winter.
💪High Strength Vitamin D3
Each tablet contains 1000iu of Vitamin D3, providing 500% of your Nutrient Reference Value (NRV) for optimal health benefits.
🌿Vegetarian and Gluten-Free
Our formula is suitable for vegetarians and free from gluten, making it accessible to a wide range of dietary needs.
💡Enhanced Absorption
Formulated for maximum absorption to ensure you get the full benefit of every tablet.
⭐ Awarded Best Overall Vitamin D 2022, 2023 and 2024 by The Independent.
Vitamin D3, 25μg (1000iu), 500%
Ingredients:
Vitamin D3 (1000IU) as Cholecalciferol, Microcrystalline Cellulose, Magnesium Stearate
Suitable for vegetarians but not suitable for vegans.
* Nutrient Reference Value AKA Recommended Daily Intake
** Nutrient Reference Value Not Established
Supply: Each pack contains 365 tablets (12 months supply) of Vitamin D 1000iu Optimum Strength.
Cost per serving: 1p
Directions: Take 1 tablet daily with a full glass of water. Not intended for use by persons under the age of 18.
All UK orders qualify for fast and free tracked UK delivery.
Delivery takes 1-2 days.
Please review our delivery policy for full delivery details.
As Featured In
Why are customers switching to Nutrition Geeks Vitamin D 1000iu
Discover why millions of customers are switching to Nutrition Geeks from other brands.
- 5 stars: 293 (89%)
- 4 stars: 22 (7%)
- 3 stars: 5 (2%)
- 2 stars: 4 (1%)
- 1 star: 6 (2%)
i like small tablets as it is easy to swallow, amazingly cute tiny packet
Only started a few days ago
Prompt delivery
Everyone should take vit D in winter so I take it from October till end of February
Hi there,
Thank you for sharing your seasonal routine and for choosing our Vitamin D 1000iu Optimum Strength. We’re pleased it fits into your winter wellness routine. We appreciate your five-star review and hope you continue to enjoy the product.
Regards,
Nutrition Geeks
Great product great price
seems good
Tiny tablets, like the d3/k2. Eady to take. Take a while to see how effective they are.
Hi there,
Thank you for sharing your feedback. We’re pleased the small tablets are easy to take. We appreciate that it can take time to assess their effectiveness, and hope they suit you well. Thank you for choosing Nutrition Geeks.
Regards,
Nutrition Geeks
Great
Great product. Speedy delivery.
quick delivery. quality product.
all good
Not using yet
Hi there,
Thank you for your 5-star rating. We hope you enjoy trying our Vitamin D 1000iu Optimum Strength when you’re ready. We appreciate you choosing Nutrition Geeks.
Regards,
Nutrition Geeks
Used these for a few years now great value and fast delivery
always a good vit to take
Arrived very quick
Little tablet is easier to swallow!!!
Amazing product
great service as usual
Fabulous product
excellent service speedy delivery i'm hoping these make a difference
very good quality many thanks
Same az 👍
Excellent price and service. Good quality
Great thanks
Great value for money, definitely benefits my health.
As always, great product
Nutrition Geeks delivery and service is excellent and the Vitamin D3 supplements fit my requirements. I haven't seen or felt any changes so far, but have only been using for a few weeks.
Hi There,
Thank you for your kind words and for choosing Nutrition Geeks. We're glad to hear that you're satisfied with our delivery service and the product fitting your needs. We hope you start to notice the benefits soon, and we're here to support you on your health journey.
Kind regards,
Nutrition Geeks
Great buy, quick delivery
Speedy delivery
Product arrived on time in good condition. I can't say if it good or bad only just received it, but reviews say it one of the best for the price.
Bery good value
Very well priced, a year's supply for under £7 quid is great.
Thanks
Frequently Asked Questions
Common questions about Vitamin D 1000iu Optimum StrengthWhat are common symptoms of Vitamin D deficiency?
Vitamin D deficiency is common, especially in regions with limited sunlight exposure or for individuals who spend most of their time indoors.
A deficiency in vitamin D can lead to a range of symptoms, such as persistent fatigue, bone pain, muscle weakness, and mood changes, all of which can significantly impact a person's quality of life.
Fatigue may reduce the ability to concentrate and perform daily tasks, leading to a decrease in overall productivity and well-being.
Bone pain and muscle weakness can make physical activities more difficult and uncomfortable, potentially limiting mobility and causing a loss of independence.
Additionally, mood changes such as irritability, anxiety, or even depression may strain personal relationships and diminish one's sense of mental and emotional balance. Over time, these symptoms may reduce an overall enjoyment of life and ability to engage in everyday activities.
The National Health Service (NHS) in the UK recommends that everyone consider taking a daily vitamin D supplement, particularly during the autumn and winter months. If you're unsure, a healthcare professional can perform a simple blood test to check your vitamin D levels and determine if supplementation is necessary.
Are there any side effects of taking Vitamin D3 supplements?
Vitamin D3 supplements are generally well-tolerated. However, excessive intake can lead to side effects such as nausea, vomiting, weakness, and serious complications like kidney damage. If you have any health concerns or are taking other medications, it's best to consult with a healthcare professional before starting any new supplement.
What foods are good sources of Vitamin D?
Vitamin D can be found in a small number of foods, including:
- Oily fish: Such as salmon, sardines, herring, and mackerel.
- Red meat
- Liver: Note that pregnant individuals should avoid liver.
- Egg yolks
- Fortified foods: Some fat spreads and breakfast cereals are fortified with Vitamin D.
Can children take Vitamin D3 1000IU tablets?
The Department of Health and Social Care in the UK recommends that adults and children over 4 years old should take a daily Vitamin D supplement containing 400IU. It's important to note that the required amount of Vitamin D may vary for each individual, depending on factors such as sun exposure and skin color. Those with darker skin tend to absorb less Vitamin D from sunlight.
For children aged 9 and above, a dose of 1000IU of Vitamin D3 can be appropriate and safe, with the option to adjust the frequency, such as once every other day during summer months.
Our Vitamin D3+K2 supplement is of higher strength (Vitamin D3 4000IU and Vitamin K2 1000IU). If you find the 4000IU strength too high, you can opt to take them once every 2-3 days instead of daily. This approach can be effective because both Vitamin D3 and K2 are fat-soluble, meaning they can be stored in the body's fat tissues and liver for future use.
Moreover, according to the NHS, taking 1000IU or less of vitamin K supplements a day is unlikely to cause any harm.
However, we strongly recommend consulting your GP or pharmacist for personalised advice based on the child's medical history.
Can Vitamin D 1000iu Optimum Strength be used alongside other products or medications?
Vitamin D3 can interact with several types of medications, including steroids and weight loss drugs. It can also affect calcium levels, so it's important to monitor if you're taking calcium supplements or medications that affect calcium levels.
Can't find the answer you're looking for?
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