Vitamin D-3 with Proprietary Blend - 5000 IU, 60 Vegan Capsules
- Supports Therapeutic Vitamin D Replenishment*
- Promotes Strong Immune & Bone Density*
- High-Potency D3 for Vitamin D Deficiency*
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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Quick Answer: Vitamin D3 5000 IU
Vitamin D3 5000 IU supplies cholecalciferol — the body-identical form of vitamin D — in a high-potency dose used to correct deficiency in adults. Take 1 softgel daily with your largest meal containing fat. Most adults with confirmed deficiency reach optimal 25(OH)D levels (40–60 ng/mL) within 8–12 weeks. Not for use in children without physician guidance.
What Is Vitamin D3 5000 IU?
Vitamin D3 (cholecalciferol) is the form of vitamin D that your skin synthesizes when exposed to UVB radiation and the form most efficiently used by the body. Each softgel in this formula delivers 5000 IU (125 mcg) of cholecalciferol — a high-potency dose designed to restore blood levels in adults who cannot reach adequacy through diet and sunlight alone.
Unlike vitamin D2 (ergocalciferol, derived from fungi), D3 raises 25-hydroxyvitamin D serum levels roughly 87% more effectively and sustains them significantly longer. The softgel delivery format dissolves in dietary fat, which is critical: vitamin D is fat-soluble, and absorption depends on the presence of fat in the digestive tract at the time of ingestion.
Remedy's formula uses a proprietary blend of organic ingredients alongside cholecalciferol to support the complete vitamin D3 absorption pathway. Each bottle contains 60 vegan softgels — a 60-day supply at the standard 1-per-day dose.
Who Needs High-Potency Vitamin D3?
Standard-dose supplements (400–1000 IU) are sufficient for maintenance in people who are already replete, but they are inadequate for correcting clinical deficiency. A 2011 NHANES analysis found that 41.6% of US adults have serum 25(OH)D below 20 ng/mL — the threshold for deficiency according to the Endocrine Society. [1]Vitamin D Deficiency Prevalence in US Adults — PubMed View source
Several populations face significantly higher risk:
- Limited sun exposure: Indoor workers, northern latitudes (above 37°N), winter months
- Darker skin pigmentation: Melanin reduces UVB-driven D3 synthesis by 95% — 70–76% of African Americans are deficient
- Obesity (BMI >30): Vitamin D is sequestered in adipose tissue, reducing bioavailability in circulation
- Malabsorption conditions: Crohn's disease, celiac disease, gastric bypass, short bowel syndrome
- Adults over 65: Skin synthesis efficiency declines by up to 75% with age
- Confirmed deficiency: 25(OH)D below 20 ng/mL on blood testing requires correction doses, not maintenance doses
Our vitamin D deficiency guide covers each risk factor in depth, including symptom recognition and when to test.
Key Benefits of Vitamin D3 Supplementation
Vitamin D functions as a pro-hormone, binding to vitamin D receptors (VDR) found in virtually every tissue in the body. Its actions extend far beyond bone — VDR signaling regulates over 200 genes involved in immune function, cell growth, inflammation, and neurotransmitter synthesis.
| Benefit Area | Key Finding | Dose Studied |
|---|---|---|
| Bone density & fracture prevention | 700–800 IU/day reduces hip fracture risk by ~26% in meta-analysis of 9 RCTs | 700–800 IU/day |
| Immune modulation | VDR expression on B cells, T cells, macrophages; regulates innate and adaptive immunity | 1000–4000 IU/day |
| Mood / depression | Low 25(OH)D independently associated with depression in 14-study meta-analysis | Variable |
| Cardiovascular markers | Low D levels predict myocardial infarction and all-cause cardiovascular mortality | Observational |
| Muscle function | VDR in skeletal muscle; deficiency associated with proximal myopathy and fall risk | 800–2000 IU/day |
| Colorectal cancer risk | Serum 25(OH)D of 34 ng/mL associated with 50% lower colorectal cancer risk | Observational |
Bone Health and Calcium Absorption
Vitamin D3 is essential for intestinal calcium absorption. Without adequate 25(OH)D, the body absorbs only 10–15% of dietary calcium. At optimal vitamin D status, absorption rises to 30–40%. A JAMA meta-analysis of 9 RCTs found that 700–800 IU/day supplementation reduced hip fracture risk by 26% and non-vertebral fracture risk by 23% in adults over 65. [2]Fracture Prevention with Vitamin D Supplementation — JAMA PubMed View source
Immune Function
Vitamin D receptors are expressed on nearly all immune cells — including B cells, T cells, natural killer cells, and macrophages. Active 1,25-dihydroxyvitamin D3 modulates both innate and adaptive immunity, suppressing pro-inflammatory cytokines while enhancing antimicrobial peptide production. Deficiency is linked to increased susceptibility to respiratory infections and autoimmune disease. [3]Vitamin D and the Immune System — PubMed View source
Mood and Mental Health
A systematic review and meta-analysis of 14 studies found that vitamin D deficiency is significantly associated with depression in adults. Vitamin D may influence mood through its role in serotonin synthesis and by modulating glucocorticoid activity in the brain. Several RCTs have found modest improvement in depressive symptom scores with supplementation over 8–26 weeks. [4]Vitamin D Deficiency and Depression — British Journal of Psychiatry PubMed View source
How Vitamin D3 5000 IU Compares to Lower Doses
The RDA for vitamin D is 600 IU for adults 19–70 and 800 IU for adults over 70 — amounts intended to maintain adequacy in people who are already sufficient. For correction of clinical deficiency, these doses are insufficient. A person with serum 25(OH)D of 12 ng/mL requires correction, not maintenance.
| Dose | Typical Use | Expected 25(OH)D Change | Time to Adequacy |
|---|---|---|---|
| 400 IU/day | Infant maintenance, multivitamin baseline | +2–4 ng/mL | Inadequate for deficiency correction |
| 1000 IU/day | General adult maintenance | +6–10 ng/mL | Months — insufficient if starting <20 |
| 2000 IU/day | Maintenance for at-risk adults | +10–16 ng/mL | 16–20 weeks from deficient baseline |
| 5000 IU/day | Deficiency correction (physician-guided) | +25–35 ng/mL | 8–12 weeks from deficient baseline |
Clinical studies have used 5000 IU daily in long-term hospital settings for 7 years with a favorable safety profile when monitored by blood testing. Most physicians recommend testing 25(OH)D after 3 months of 5000 IU supplementation, then adjusting dose to maintain 40–60 ng/mL. [5]Daily Oral Dosing of Vitamin D3 5000 IU — Journal of Steroid Biochemistry PubMed View source
For guidance on interpreting your blood test results and determining the right dose for your situation, see our complete guide to testing and correcting vitamin D levels.
Vitamin D3 and Magnesium: Why You Need Both
Magnesium is a required cofactor in every step of the vitamin D activation pathway. The liver enzyme that converts cholecalciferol to 25(OH)D is magnesium-dependent. The kidney enzyme that converts 25(OH)D to the active hormone 1,25(OH)2D (calcitriol) is also magnesium-dependent. Without adequate magnesium status, supplemented vitamin D cannot be activated — it accumulates as inactive metabolites.
An estimated 48% of US adults consume below the RDA for magnesium, meaning supplementing vitamin D without addressing magnesium status may limit therapeutic outcomes. Symptoms of suboptimal magnesium — muscle cramps, poor sleep, fatigue — may persist despite vitamin D correction if magnesium remains insufficient.
Remedy's Magnesium Glycinate 1000 mg supplies the chelated magnesium form with the highest bioavailability, ensuring the cofactor required for full D3 activation is present while also supporting sleep quality and muscle relaxation independently.
Vitamin D3 and K2: The Critical Pairing
When vitamin D3 supplementation increases calcium absorption, that calcium must go somewhere. Vitamin K2 (specifically the MK-7 form) activates two proteins that direct calcium to the correct destinations: osteocalcin deposits calcium into bone matrix, while matrix Gla protein (MGP) prevents calcium from depositing in arterial walls.
Without adequate vitamin K2, high-dose vitamin D3 supplementation may theoretically increase soft-tissue calcium accumulation over time. This is why practitioners who recommend 5000 IU/day often suggest pairing it with a K2 supplement. While no K2 supplement is currently in our catalog, this combination is worth discussing with your healthcare provider — particularly if you are taking vitamin D long-term at 5000 IU/day.
Dosage and Timing
Vitamin D3 is fat-soluble. A clinical study found that taking vitamin D with the largest meal of the day — rather than on an empty stomach — produced 50% higher serum 25(OH)D levels over 3 months. Take 1 softgel daily with your largest fat-containing meal. [6]Taking Vitamin D with Largest Meal Improves Absorption — Journal of Bone and Mineral Research PubMed View source
| Goal | Dose | Timing | Duration Before Re-Testing |
|---|---|---|---|
| Deficiency correction (25(OH)D <20 ng/mL) | 5000 IU/day | With largest meal | 8–12 weeks, then retest |
| Insufficiency correction (20–30 ng/mL) | 2000–5000 IU/day | With largest meal | 12 weeks, then retest |
| Maintenance (already 40–60 ng/mL) | 1000–2000 IU/day | With any fat-containing meal | Annual testing |
Some evidence suggests vitamin D taken late in the evening may interfere with melatonin signaling, potentially affecting sleep onset. Morning or midday dosing is preferred. Weekly high-dose dosing (e.g., 35,000 IU once weekly) is pharmacologically equivalent to daily dosing but produces larger peak-to-trough fluctuations — daily dosing is preferred for steady-state deficiency correction.
For a breakdown by age group, body weight, and deficiency severity, see our vitamin D supplements types, dosage, and safety guide.
Safety: Is 5000 IU Too Much?
The Tolerable Upper Intake Level (UL) established by the Institute of Medicine is 4000 IU/day for adults without medical supervision — a conservative threshold set to ensure safety across the general population. However, 5000 IU/day is widely used under physician guidance for deficiency correction. [7]2011 Dietary Reference Intakes for Vitamin D — Journal of Clinical Endocrinology PubMed View source
Vitamin D toxicity (hypervitaminosis D) is caused by hypercalcemia — excess calcium in the blood — not by direct toxicity of vitamin D itself. Clinically meaningful toxicity is rare at doses below 10,000 IU/day and typically requires months of sustained intake at that level. A comprehensive risk assessment published in the American Journal of Clinical Nutrition found no evidence of adverse effects at intakes up to 10,000 IU/day. [8]Risk Assessment for Vitamin D Upper Limit — American Journal of Clinical Nutrition PubMed View source
Monitoring recommendation: If you supplement at 5000 IU/day for more than 3 months, request a 25-hydroxyvitamin D blood test to confirm levels are in the target range of 40–60 ng/mL and not above 100 ng/mL. Discuss with your healthcare provider before starting if you have any history of kidney stones, hyperparathyroidism, or granulomatous diseases such as sarcoidosis.
Drug Interactions and Contraindications
Vitamin D3 5000 IU has a favorable safety profile for most adults, but several drug and condition interactions require attention before starting.
| Drug Class / Condition | Interaction / Risk | Guidance |
|---|---|---|
| Thiazide diuretics (hydrochlorothiazide) | Reduce urinary calcium excretion; combined with high-dose vitamin D may cause hypercalcemia | Monitor calcium and 25(OH)D every 3 months; physician oversight required |
| Corticosteroids (prednisone, prednisolone) | Impair vitamin D metabolism and reduce calcium absorption; long-term use depletes D status | Higher vitamin D doses may be needed; physician guidance recommended |
| Orlistat (weight-loss drug) | Reduces fat absorption — also reduces absorption of all fat-soluble vitamins including D3 | Separate vitamin D dose from orlistat by at least 2 hours |
| Anticonvulsants (phenytoin, carbamazepine) | Accelerate vitamin D catabolism via CYP enzyme induction; rapidly deplete vitamin D stores | Monitor 25(OH)D closely; may require 2–3x standard supplementation doses |
| Cholestyramine / colestipol | Bile acid sequestrants impair fat-soluble vitamin absorption; reduce D3 bioavailability | Take vitamin D 4–6 hours before or after cholestyramine |
| Sarcoidosis / granulomatous disease | Macrophages convert 25(OH)D to active calcitriol unregulated, risking hypercalcemia | Contraindicated without close physician monitoring of calcium and D levels |
| Hyperparathyroidism | Elevated PTH independently raises calcitriol; adding vitamin D can cause hypercalcemia | Use only under endocrinologist supervision |
| Kidney disease (CKD stages 3–5) | Impaired renal conversion of 25(OH)D to calcitriol; different form of vitamin D (calcitriol) may be required | Physician-directed vitamin D therapy only |
Not for use in children under 12 without physician guidance. Not recommended during pregnancy or breastfeeding at 5000 IU without physician supervision — standard prenatal recommendations are 600–2000 IU/day.
Why Choose Remedy's Vitamin D3 5000 IU?
Not all vitamin D3 supplements deliver what they claim. Remedy's formula is built for bioavailability, purity, and consistency — the 3 factors that determine whether a supplement actually moves your 25(OH)D levels.
| Feature | What You Get | Why It Matters |
|---|---|---|
| Cholecalciferol (D3) | 5000 IU per softgel | 87% more effective than D2 at raising 25(OH)D levels; body-identical form |
| Vegan softgel | Plant-derived softgel capsule | No gelatin; suitable for vegetarian and vegan diets |
| Proprietary absorption blend | Organic whole-food base | Provides dietary fat matrix for optimal fat-soluble vitamin absorption |
| 60 capsules per bottle | 60-day supply at 1/day | Full 2-month correction cycle in a single bottle |
| No artificial fillers or binders | Clean label formulation | No magnesium stearate, silicon dioxide, or artificial flow agents |
| Made in USA | GMP-certified domestic facility | Third-party tested for potency and heavy metals |
Hub Articles: Learn More About Vitamin D
These in-depth resources support every aspect of your vitamin D journey, from understanding deficiency to reading your lab results:
- Vitamin D: The Complete Guide to Benefits, Sources, and Deficiency — comprehensive reference covering all major research areas
- How Much Vitamin D Should You Take Daily? — evidence-based dosage guide by age, weight, and health status
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Frequently Asked Questions
Is 5000 IU of vitamin D3 too much to take daily? +
For most adults with confirmed deficiency, 5000 IU/day is a physician-used correction dose, not an extreme amount. The Institute of Medicine's Tolerable Upper Intake Level is 4000 IU/day as a conservative general-population threshold. Clinical research shows no evidence of adverse effects at up to 10,000 IU/day when used short-term. Monitor your 25(OH)D blood levels after 8–12 weeks to confirm you are in the 40–60 ng/mL target range.
How long does it take for vitamin D3 5000 IU to work? +
Most adults with confirmed deficiency (25(OH)D below 20 ng/mL) reach optimal levels of 40–60 ng/mL within 8–12 weeks of consistent daily 5000 IU supplementation. Individuals with obesity, malabsorption disorders, or severe deficiency may require 16–20 weeks. Retest your 25(OH)D at the 3-month mark to confirm and adjust your dose if needed.
Should I take vitamin D3 with food or on an empty stomach? +
Always take vitamin D3 with food, specifically with your largest fat-containing meal of the day. A clinical study found that taking vitamin D with the largest meal produced 50% higher serum 25(OH)D levels over 3 months compared to taking it on an empty stomach or with a small snack. Vitamin D is fat-soluble and requires dietary fat for absorption.
Do I need to take vitamin K2 with vitamin D3 5000 IU? +
Many practitioners recommend pairing high-dose vitamin D3 (3000–5000 IU/day) with vitamin K2 (typically 100–200 mcg MK-7). Vitamin D3 increases calcium absorption; vitamin K2 directs that calcium into bone via osteocalcin and prevents arterial calcification via matrix Gla protein (MGP). While the clinical evidence for this pairing is still emerging, the theoretical rationale is strong, and K2 supplementation at standard doses carries minimal risk.
Can I take vitamin D3 with magnesium? +
Yes — taking magnesium alongside vitamin D3 is not only safe but recommended. Magnesium is a required cofactor in at least 2 enzymatic steps of the vitamin D activation pathway. Without adequate magnesium (RDA: 310–420 mg/day for adults), supplemented vitamin D may not fully convert to its active form, calcitriol. Up to 48% of US adults consume below the magnesium RDA, making co-supplementation a practical consideration for most people.
What are the symptoms of vitamin D deficiency? +
Vitamin D deficiency symptoms include fatigue, bone pain, muscle weakness, frequent infections, low mood, and impaired wound healing. In severe cases, children develop rickets and adults develop osteomalacia (soft bones). Because symptoms are nonspecific, many people are deficient for years without knowing. The only reliable way to diagnose deficiency is a 25-hydroxyvitamin D blood test, with deficiency defined as below 20 ng/mL.
Who should not take vitamin D3 5000 IU? +
Avoid 5000 IU/day without physician supervision if you have: hyperparathyroidism, sarcoidosis or other granulomatous diseases, hypercalcemia (high blood calcium), kidney stones with a history of absorptive hypercalciuria, or chronic kidney disease (stages 3–5). Also consult your doctor if you take thiazide diuretics or anticonvulsants (phenytoin, carbamazepine), as these 2 drug classes significantly interact with vitamin D metabolism.
What is the difference between vitamin D2 and vitamin D3? +
Vitamin D2 (ergocalciferol) is derived from plant sources and fungi. Vitamin D3 (cholecalciferol) is the form produced by human skin under UVB light and found in animal-source foods. D3 is approximately 87% more effective than D2 at raising serum 25(OH)D levels and maintains those levels for at least 2–3 times longer after supplementation stops. Most clinical guidelines now recommend D3 over D2 for supplementation.
How do I know if vitamin D3 5000 IU is working? +
The most reliable indicator is a 25-hydroxyvitamin D blood test. A successful correction from deficiency baseline (below 20 ng/mL) to optimal range (40–60 ng/mL) typically takes 8–12 weeks at 5000 IU/day. Subjectively, many people report improved energy, better sleep quality, and fewer winter respiratory infections within 4–8 weeks, though these are not specific to vitamin D and should not replace blood testing.
Can vitamin D3 help with depression and mood? +
Multiple meta-analyses have found a significant association between low vitamin D levels and higher depression risk — including a 14-study analysis published in the British Journal of Psychiatry. Several RCTs have shown modest but meaningful improvements in depression symptom scores over 8–26 weeks of supplementation. Vitamin D is not a replacement for antidepressant treatment, but correcting deficiency is a reasonable adjunct in patients with confirmed low 25(OH)D and mood symptoms.
What time of day should I take vitamin D3? +
Morning or midday is preferred. Some evidence suggests that vitamin D taken in the evening may suppress melatonin production, potentially delaying sleep onset, though this effect appears to be small. The more important timing factor is food: take it with your largest fat-containing meal regardless of the time of day. Consistency is key — taking it at the same time daily improves compliance and results in more stable 25(OH)D levels.
Does vitamin D3 5000 IU need to be refrigerated? +
No refrigeration is required. Store at room temperature between 59°F and 77°F (15°C–25°C), away from direct sunlight and moisture. Vitamin D3 in softgel form has a shelf life of approximately 2 years from the manufacture date when stored properly. Heat above 86°F and direct UV light can degrade potency over time — avoid storing in a car glove compartment or on a sunny windowsill.
Can children take vitamin D3 5000 IU? +
This product is formulated for adults and is not recommended for children under 12 without physician guidance. Pediatric dosing for vitamin D is much lower: 400 IU/day for infants 0–12 months, and 600 IU/day for children 1–18 years as per standard guidelines. Children with confirmed severe deficiency may require higher physician-prescribed doses (1000–2000 IU/day or more), but 5000 IU/day exceeds typical pediatric ranges.