Vitamin D supplements
1 capsule per day
Premium vitamin D3
1000 IU (25 µg)
- High-quality, plant-based supplement
- Treats vitamin D deficiency
- Supports your bones and immune system
- Can support your mood
- Can help PCOS symptoms
£12.00
/ 90 capsules
Vitamin D3 capsules made in the UK
All our vitamin D supplements are high quality and non-GMO, with full ingredient traceability within the UK.
Our vitamin D3 is made from lichen. This is the best form for your body to maintain your blood vitamin D levels for longer. It’s also a great source of vitamin D for plant-based diets.
1 capsule provides 1000 IU (25 mcg). We recommend taking 1 Thriva capsule per day.
I’ve been consistently using Thriva supplements over the last 6 months. Vitamin D was recommended to me after my Thriva test showed I had low levels. My levels have increased in accordance with my taking them, which I’m happy with and I do think they are higher quality than others on the market.
Vitamin D keeps the sun shining all year round
Living in the UK means you can’t always count on the sun to get your vitamin D. But our premium, plant-based vitamin D supplements bring you the benefits of the sunshine every day of the year.
Improve your mood
Vitamin D deficiencies may affect your mood and make you feel down. If this is the case, a supplement might help.
Support your immune system
Vitamin D supports your immune system to help fight off illnesses like the common cold and other viruses.
Strengthen your bones and muscles
Vitamin D helps you absorb more calcium from your food, contributing to healthier bones, teeth, and muscles.
Improve PCOS symptoms
Vitamin D can help improve testosterone levels and regulate your menstrual cycle if you suffer from PCOS.
Recommended by GPs
“1 in 6 adults in the UK have low vitamin D levels in their blood. It’s a widespread deficiency associated with many conditions — like bone pain (osteomalacia), weak bones (osteoporosis), depression, and an increased risk of type 2 diabetes.
You can quickly correct a vitamin D deficiency by taking a supplement. Our supplements are great at keeping your bones, muscles, and brain healthy and happy!“
— Vishal Shah MBBS MA (Cantab) MRCGP
Chief Medical Officer
Stop guessing, start tracking your vitamin D
Regular blood tests are the best way to see the effect your vitamin D supplements are having.
Order a vitamins blood test and see how your supplements have affected your vitamin D levels. We’ll offer you a 10% discount after you purchase your supplements.
We’ll send you your results with expert advice from a GP on what steps to take next.
Want to know more?
What is the correct dosage for this supplement?
1 capsule provides 1000 IU (25 mcg).
The best way to know the right dosage for you is to take a vitamins blood test.
1000UI a day is considered safe and can help correct deficiencies or optimise vitamin D levels.
Consider taking at least 10mcg a day (400UI) from October-March if you have little sunshine exposure, have a dark skin tone, or cover up most of your skin when outdoors.*
Take capsules with a meal and a glass of water.
Do not take over 100mcg (4000UI) a day.
*Public Health England (PHE) advises that everyone should consider taking a daily vitamin D supplement from October to March. This is because sunlight exposure is low and your body gets most of its vitamin D this way.
All dosages are for adults over 18 years.
Can I take this supplement if I am pregnant or breastfeeding?
Vitamin D is considered safe for women to take throughout pregnancy and breastfeeding. It is recommended that pregnant women consider taking at least 10mcg of vitamin D daily, particularly during September and March. Do not take more than 100mcg (4000 IU) a day as this can be harmful. Always discuss with your doctor or pharmacist before starting any new supplements if you’re pregnant or breastfeeding.
Who should not take this supplement?
Certain conditions can also make you more sensitive to vitamin D supplementation, or you might require additional tests (like a calcium test) to help interpret your vitamin D.
- Sarcoidosis — an inflammatory disease
- Conditions that affect your parathyroid glands, particularly hyperparathyroidism — which regulate calcium in your body
- Some cancers
- Tuberculosis
- Kidney disease — like kidney stones or advanced chronic kidney disease
- Gut diseases — like Crohn's disease
- Williams syndrome
If you have one of these conditions, speak to your doctor before starting a supplement.
When will my supplements arrive?
We deliver our supplements by Royal Mail first class.
We typically send out kits on the same working day if ordered Monday — Friday before 9am. Orders typically arrive in 2 to 3 business days. Orders placed on the weekend might take 3 or 4 days to arrive.
Orders are occasionally delayed in the post.
If more than ten business days have passed since ordering your supplements, please get in touch with our support team at hello@thriva.co confirming your delivery address.
When and how do I take this supplement?
1 capsule provides 1000 IU (25 mcg).
How frequently you take this supplement depends on your dosage. When you take them is up to you.
We generally recommend taking one Thriva capsule a day; this dosage is considered safe and can help correct deficiencies or optimise vitamin D levels. However, the best way to know the right dosage for you is to take a Thriva blood test.
Do not take more than 100mcg (4000 IU) a day.
Consider taking at least 10mcg a day (400UI) from October-March if you have little sunshine exposure, have a dark skin tone (for example, if you have an African, African-Caribbean or south Asian background), or cover up most of your skin when outdoors.
Take capsules with a meal and a glass of water.
All dosages are for adults over 18 years.
Ingredients
Corn syrup, arabic gum, vitamin D3 oil (D-alpha-tocopherol from sunflower, fractionated coconut oil), silicon dioxide, mono- and diglycerides of fatty acids, sodium ascorbate.
Capsule: vegetable cellulose 100 mg, and rice flour 490 mg.
No colourings. Non-GMO.
Does not contain any major allergenic ingredients.
Produced in a facility that may handle allergens
Safety and side effects
Do not take more than 100 mcg (4000 IU) of vitamin D a day* as this can be harmful. Taking too much vitamin D over a long period of time can cause raised blood calcium (hypercalcaemia) — which can cause damage to bones, kidneys, and the heart.
Store in a cool dry place away from direct sunlight. Keep out of sight and reach of children.
Food supplements should not be used as a substitute for a varied diet.
All dosages are for adults over 18 years.
Get the app
Accreditation
All our partner labs hold UKAS, ISO17025 / ISO15189 accreditations.
Secure payment
