Quick answer: vitamin D is fat-soluble and is absorbed well from regular drops or softgels taken with a meal, so liposomal vitamin D offers little proven advantage for most people. Canadian guidance recommends 600 IU a day for adults up to 70 and 800 IU for those over 70, with an upper limit of 4,000 IU a day. Health Canada also advises adults over 50 to take a daily 400 IU vitamin D supplement.
Why vitamin D matters in Canada
Vitamin D helps the body absorb calcium and phosphorus and is essential for strong bones and teeth. It also plays a role in muscle function and the immune system. Your skin makes vitamin D from UVB sunlight, but at Canadian latitudes the sun is too weak for much of the year, roughly October to March in most populated areas, for meaningful production. Sunscreen, darker skin, age and time indoors reduce production further.
How much do you need?
| Age | Recommended daily intake | Upper limit |
|---|---|---|
| Infants 0 to 12 months | 400 IU (adequate intake) | 1,000 to 1,500 IU |
| 1 to 70 years | 600 IU | 2,500 to 4,000 IU (by age) |
| 71+ years | 800 IU | 4,000 IU |
| Pregnancy and breastfeeding | 600 IU | 4,000 IU |
Source: Dietary Reference Intakes used by Health Canada. Health Canada also recommends a 400 IU daily vitamin D supplement for breastfed infants.
Food sources include fatty fish (salmon, trout, sardines), egg yolks, and fortified cow’s milk and plant beverages, which are fortified in Canada.
D3 vs D2
Vitamin D3 (cholecalciferol) comes from animal sources or lichen (a vegan option). Vitamin D2 (ergocalciferol) comes from plants and fungi. Both raise blood levels, but several studies suggest D3 raises and maintains them more effectively, which is why most supplements use D3.
Where vitamin K2 fits in
Vitamin K helps activate proteins involved in bone mineralisation and blood clotting. Many products combine D3 with K2 (menaquinone, often MK-7) on the theory that K2 helps direct calcium to bones. The research on combined D3 and K2 for bone and heart outcomes is still developing. Important: people taking warfarin or other vitamin K antagonist blood thinners should not start vitamin K supplements without their doctor, because vitamin K directly affects how these drugs work.
Is liposomal vitamin D better?
Liposomes help most with fragile or poorly absorbed nutrients (see Liposomal Absorption Explained). Vitamin D is already absorbed with dietary fat through the normal fat-absorption pathway. Taking a regular softgel or drops with a meal that contains some fat improves absorption. Small studies comparing liposomal and conventional vitamin D exist, but they do not show a consistent, meaningful advantage that would justify a large price difference. Exceptions may include people with fat malabsorption conditions, who should be guided by their doctor.
Our take: regular vitamin D3 drops or softgels with an NPN are the value choice. See the full liposomal buying guide.
Safety
- Do not exceed 4,000 IU a day long term unless a health professional recommends it and monitors you.
- Too much vitamin D can raise blood calcium, leading to nausea, weakness, kidney stones and heart rhythm problems.
- Check total intake from all products: multivitamins, calcium-plus-D products and D3/K2 combinations all add up.
- People with kidney disease, sarcoidosis or high blood calcium should talk to their doctor first.
Frequently asked questions
Should I get my vitamin D level tested?
Routine testing is not covered for everyone in every province. Ask your doctor whether testing makes sense for you, especially if you have risk factors or bone health concerns.
Is it better to take vitamin D daily or weekly?
Both can work. Daily dosing is the most common and is easy to remember. Very large single doses are not recommended without medical advice.
Can I take vitamin D with liposomal vitamin C?
Yes, there is no known problem combining them at label doses.
Sources
- Health Canada. Vitamin D and calcium: updated Dietary Reference Intakes; Canada’s Food Guide.
- National Institutes of Health, Office of Dietary Supplements. Vitamin D and Vitamin K fact sheets.
- Tripkovic L, et al. Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status. American Journal of Clinical Nutrition, 2012.
This article is for general information only and is not medical advice. See our medical disclaimer.
