Can I take D Complex with Vegan Glucosamine?

Understanding the interactions, benefits, and safety of combining these two powerful supplements.

D Complex
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Vegan Glucosamine

Short answer

We found no direct interaction between Vitamin D3 with A, E and K2 and Glucosamine in the sources below, but they share a caution.

Both have a note about blood thinners such as warfarin (see each one below).

Vitamin D3 with A, E and K2

What it is: A combination of vitamin D3 with vitamins A, E and K2. Vitamin D helps the body absorb calcium and supports muscles, nerves and the immune system.

What the research says: Getting enough vitamin D and calcium helps protect against osteoporosis.

Cautions

  • Adults shouldn't exceed 4,000 IU (100 mcg) of vitamin D a day from all sources unless a clinician advises more. Too much can cause nausea, weakness, confusion and kidney stones.
  • Too much preformed vitamin A can cause headaches and blurred vision, and birth defects in pregnancy.
  • High-dose vitamin E supplements may raise bleeding risk.

Medicines to check

  • Warfarin: vitamin K and vitamin E both matter, and vitamin K intake should stay steady
  • Statins, steroids, orlistat and thiazide diuretics (vitamin D notes)
  • Vitamin A-based medicines such as acitretin

In Holitro: D Complex (5,000 IU per capsule)

Sources: NIH Office of Dietary Supplements: Vitamin D: Fact Sheet for Consumers (updated November 2022); NIH Office of Dietary Supplements: Vitamin A: Fact Sheet for Consumers (updated March 2025); NIH Office of Dietary Supplements: Vitamin E: Fact Sheet for Consumers (updated March 2021); NIH Office of Dietary Supplements: Vitamin K: Fact Sheet for Consumers (updated March 2021)

Glucosamine

What it is: A compound found in joint cartilage, sold for osteoarthritis.

What the research says: Guidelines disagree: US rheumatology and osteoarthritis groups strongly recommend against it for knee osteoarthritis, while orthopedic surgeons say it may help some people.

Cautions

  • No major safety problems in large studies, but it may raise blood sugar in some people.

Medicines to check

  • Warfarin: linked to a higher bleeding risk
  • Diabetes medicines: it may raise blood sugar

Source: NIH National Center for Complementary and Integrative Health: Glucosamine and Chondroitin for Osteoarthritis (updated October 2023)

Check with your doctor or pharmacist, especially if you take medication.

Check your stack — free

Educational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.

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