Food, sunlight and supplements
Vitamin D is found in relatively few foods. Health Canada recommends a daily dietary source and identifies supplementation for certain life stages when food sources are insufficient.[5]
Canadian natural-health shopping guide
Vitamin D
Compare vitamin D drops, softgels and combination products by micrograms or IU per serving, total intake, age and clinical context.
123 Vitamin D products in this collection
Shop current prices and availability below. Use the product and brand filters to narrow the list, or add an in-stock item directly to your cart.
Helpful buying guide
How to shop Vitamin D
Vitamin D supports calcium absorption and bone health and contributes to normal muscle and immune function. Health Canada recommends a daily dietary source and advises 400 IU (10 mcg) supplementation for adults 51 and older; breastfed infants have separate 400 IU guidance. High-dose vitamin D is not a general wellness shortcut and can cause toxic high calcium levels.
Evidence-based decision guide
Understand the options before you choose
Bone and calcium
Vitamin D enables calcium absorption and is important for bone mineralization. A bone-health plan also includes adequate calcium, activity and individual fracture-risk assessment.[8][9]
Testing and deficiency
A blood 25-hydroxyvitamin D test can assess status, but routine testing is not necessary for every healthy shopper. Risk factors, symptoms, medical conditions and a planned high-dose regimen can change the decision.[8]
Avoid high-dose stacking
Vitamin D toxicity causes hypercalcemia and can damage kidneys and other tissues. Count every source and do not use repeated high-dose products without a monitored plan.[8]
Vitamin D shopping checkpoints by situation
| Situation | What to compare | Why it matters |
|---|---|---|
| Adult daily use | Food sources, multivitamin and separate vitamin D total | Prevents unintentional duplication.[5] |
| Breastfed infant | 400 IU amount and exact drops or mL | Concentrations vary widely between products.[6][7] |
| Calcium combination | Vitamin D plus elemental calcium per serving | Both nutrients may be duplicated elsewhere.[9][8] |
| High-dose clinician plan | Laboratory target, duration and monitoring | High doses can cause hypercalcemia and toxicity.[8] |
Practical tips beyond supplements
- Start with food, sleep, movement and other daily habits that relate to the goal.
- Define one measurable outcome and a realistic date to review whether the product is helping.
- Record the exact product, NPN or DIN-HM, daily amount and start date.
- Introduce one new product at a time so benefit or adverse effects can be identified.
When assessment matters
- Do not use a supplement to delay emergency care or assessment of severe, persistent or rapidly worsening symptoms.
- Pregnancy, breastfeeding, childhood, surgery and serious chronic disease require product-specific advice.
- Review possible interactions when prescription medicines or several supplements are used.
- Stop the product and seek advice if a concerning new symptom or suspected allergic reaction occurs.
A practical buying checklist
What to compare before you buy
- Compare the amount per drop, spray, capsule or full serving in both mcg and IU when shown.
- Count vitamin D from multivitamins, prenatal products, calcium formulas and fortified foods.
- Use an age-appropriate product and its supplied measuring device.
- Ask whether testing is useful when there are risk factors, symptoms or a clinician-directed high-dose plan.
- Obtain advice with kidney disease, high calcium, granulomatous disease, hyperparathyroidism or medicines that alter vitamin D/calcium.
Need help choosing?
Bring your medication list, allergies, health conditions and current supplements. A Sina pharmacist can help you compare labels and identify questions for your prescriber.
Call 604-336-7462Frequently asked questions
What is the difference between IU and mcg?
They are two units used for vitamin D. For vitamin D, 1 mcg equals 40 IU; always compare the same unit and full serving.[8]
Who does Health Canada advise to take vitamin D?
Health Canada recommends a daily dietary source for people aged 2–50 and advises adults 51 and older to take 400 IU (10 mcg) daily. Individual needs can differ.[5]
Do breastfed babies need vitamin D?
Canadian guidance recommends 400 IU (10 mcg) daily from birth for breastfed babies. Verify the exact drop concentration.[6][7]
Is vitamin D3 better than D2?
Both raise vitamin D status, though their effects can differ. Choose based on the exact Canadian product, amount, source, diet and clinician advice.[8]
Should everyone have a vitamin D blood test?
No. Testing is most useful when risk factors, symptoms, medical conditions or a high-dose treatment plan make the result likely to change care.[8]
Can more vitamin D prevent infections?
Adequate vitamin D supports normal immune function, but high-dose supplementation is not a proven universal infection-prevention strategy.[10][8]
Can I take vitamin D with calcium?
Often, but count both nutrients from diet and all supplements. Kidney stones, kidney disease or abnormal calcium require individual advice.[9][8]
Can vitamin D be toxic?
Yes. Excess supplemental vitamin D can cause hypercalcemia, nausea, weakness, kidney stones and kidney injury.[8]
Are vitamin D drops only for children?
No. Drops are used by different age groups, but concentration varies. Dose by the exact label, not by the number of drops from another product.[4]
Can vitamin D interact with medicines?
Yes. Some steroids, weight-loss medicines, statins and thiazide diuretics can affect vitamin D or calcium. Ask a pharmacist for product-specific advice.[8]
Canadian sources and label guidance
- Health Canada: Natural health products
- Health Canada: Search licensed natural health products
- Health Canada: Safe use of natural health products
- Health Canada: Improved natural health product labelling
- Health Canada: Advice on vitamin and mineral supplementation
- Public Health Agency of Canada: Your guide to a healthy pregnancy
- Canadian Paediatric Society: Preventing vitamin D deficiency and rickets
- NIH Office of Dietary Supplements: Vitamin D
- NIH Office of Dietary Supplements: Calcium
- NIH Office of Dietary Supplements: Immune function and infectious diseases
Content prepared by Sina Pharmacy team using the sources above. It is not a diagnosis or an individualized treatment plan. The current Canadian product label and advice from your healthcare professional take precedence.