☀️ D3 vs D2 — Why Cholecalciferol Is the Superior Form

Multiple systematic reviews and meta-analyses have confirmed that Vitamin D3 (Cholecalciferol) is significantly more effective than Vitamin D2 (Ergocalciferol) at raising and maintaining serum 25-hydroxyvitamin D levels. A landmark meta-analysis published in the American Journal of Clinical Nutrition (Tripkovic et al., 2012; PubMed 22552031) found that D3 was approximately 87% more effective than D2 in raising and maintaining blood levels of 25-hydroxyvitamin D. Charge Products Vitamin D3 tablets use Cholecalciferol — the same form the body produces naturally from sunlight. Educational background only — food supplement, not a medicine.

🦴 Calcium Absorption and Bone Health

Vitamin D3 regulates intestinal calcium and phosphate absorption — without adequate Vitamin D, only 10–15% of dietary calcium is absorbed. With sufficient Vitamin D, this rises to 30–40%. Calcitriol (the active form of Vitamin D3) directly stimulates calcium transport proteins in the intestinal wall. This mechanism underpins the authorised EU/UK health claims: Vitamin D contributes to normal absorption of calcium and phosphorus and to the maintenance of normal bones and normal teeth. Educational background only — food supplement, not a medicine.

🛡️ Immune System Function

Vitamin D receptors (VDRs) are expressed on virtually all immune cells — including T cells, B cells, macrophages and dendritic cells. Calcitriol modulates both innate and adaptive immune responses. A 2017 meta-analysis in the BMJ (Martineau et al., PubMed 28202713) analysed 25 RCTs involving 11,321 participants and found that Vitamin D supplementation was associated with reduced risk of acute respiratory tract infections. Vitamin D contributes to the normal function of the immune system — an authorised EU/UK health claim. Educational background only — food supplement, not a medicine.

💪 Muscle Function

Vitamin D receptors are present in skeletal muscle tissue. Vitamin D deficiency is associated with proximal muscle weakness, increased fall risk in older adults and impaired muscle function. Calcitriol regulates protein synthesis in muscle cells and calcium transport within muscle fibres. Vitamin D contributes to the maintenance of normal muscle function — an authorised EU/UK health claim. Educational background only — food supplement, not a medicine.

✅ Vitamin D contributes to the normal function of the immune system

What is Vitamin D3 10,000 IU?

Vitamin D3 10,000 IU Tablets contain 250mcg Cholecalciferol (Vitamin D3) per tablet — equivalent to 10,000 International Units, 5,000% NRV. Cholecalciferol is the same form of Vitamin D the body produces naturally from UVB sunlight — and the most effective form for raising serum 25-hydroxyvitamin D levels. This is a high-dose product that exceeds the UK FSA safe upper limit of 4,000 IU per day. Consult your GP before use. Food supplement — not a medicine.

Is 10,000 IU Vitamin D3 safe?

10,000 IU (250mcg) per day exceeds the UK FSA safe upper limit for supplementation of 100mcg (4,000 IU) per day. The NHS recommends only 400 IU (10mcg) per day for most adults during autumn and winter. This high-dose product is intended for adults under GP supervision — for example to address confirmed severe deficiency identified through blood testing. Vitamin D toxicity can occur with prolonged excessive intake. Always consult your GP before use. Food supplement — not a medicine.

Why is Vitamin D3 better than D2?

Vitamin D3 (Cholecalciferol) is approximately 87% more effective than Vitamin D2 (Ergocalciferol) at raising and maintaining serum 25-hydroxyvitamin D levels according to a meta-analysis by Tripkovic et al. (American Journal of Clinical Nutrition, 2012; PubMed 22552031). D3 is the form the body produces naturally from sunlight. D2 is plant-derived. For supplementation purposes, D3 Cholecalciferol is the preferred form. Educational background only — food supplement, not a medicine.

Why are UK Vitamin D levels low?

The UK receives insufficient UVB sunlight for adequate skin Vitamin D synthesis from October to March — approximately 6 months of the year. Public Health England data shows approximately 1 in 5 UK adults has low Vitamin D levels. Those at highest risk include people with darker skin tone, older adults, those with limited sun exposure, those who cover skin for cultural reasons, and people with malabsorption conditions. The NHS recommends 400 IU (10mcg) daily for most UK adults and children over 1 year, particularly during autumn and winter. Educational background only — food supplement, not a medicine.

What are the authorised health claims for Vitamin D?

Vitamin D has multiple authorised EU/UK health claims under Regulation 1924/2006 retained in UK law: normal immune system function · maintenance of normal bones · maintenance of normal teeth · normal muscle function · normal blood calcium levels · normal absorption of calcium and phosphorus · normal function of the immune system in children · cell division. These are the only health claims made for this product. Food supplement — not a medicine.

When is the best time to take Vitamin D3?

Vitamin D3 is fat-soluble — it is best absorbed when taken with a meal containing dietary fat. There is no significant clinical difference between morning and evening administration. Take at the same time each day to establish a consistent routine. Follow the directions on your product label and your GP's guidance. Do not take alongside other Vitamin D supplements without medical supervision. Food supplement — not a medicine.

Who should not take Vitamin D3 10,000 IU?

Do not take without GP supervision if you have kidney disease, hypercalcaemia, sarcoidosis, granulomatous conditions (e.g. tuberculosis), or are taking thiazide diuretics, anticonvulsants, orlistat, or cardiac glycosides. Not recommended for children, infants, or pregnant or breastfeeding women without medical supervision. Do not take alongside other Vitamin D supplements. Always consult your GP before use. Food supplement — not a medicine.

What are the signs of Vitamin D toxicity?

Vitamin D toxicity (hypervitaminosis D) is rare but can occur with prolonged excessive intake. Symptoms of hypercalcaemia from excessive Vitamin D include nausea, vomiting, weakness, frequent urination, kidney problems, and confusion. If you experience any of these symptoms while taking high-dose Vitamin D, stop taking it and consult your GP immediately. Vitamin D toxicity does not occur from sunlight exposure — only from excessive supplementation. Food supplement — not a medicine.

Is this product a medicine?

No — Vitamin D3 10,000 IU Tablets by Charge Products are food supplements, not licensed medicines. Not intended to diagnose, treat, cure or prevent any disease or medical condition. However, due to the high dose, GP consultation before use is strongly recommended. Food supplement — not a medicine.

Can I buy Vitamin D3 10,000 IU wholesale UK?

Yes — wholesale Vitamin D3 tablets UK and bulk Cholecalciferol supplement UK supply available from Charge Products (Big Idea Services Ltd, Co. No. 11645389), supplying health retailers, resellers and trade buyers from UK-held stock since 2016. 158,000+ verified marketplace sales. Contact via trade enquiry page.

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