Vitamin D3 + K2 after 40: what it is and who it's for.
When estrogen drops, bone loss speeds up. It's quiet, you can't feel it, and it's one of the most important things to get ahead of in perimenopause. Vitamin D is one of the basics.
Why D3 and K2 together?
Vitamin D helps your gut absorb calcium. Vitamin K2 activates proteins that help bind calcium into bone. That's why they're often paired. This pouch includes two forms of K2: MK-4 and MK-7.
From the product's Supplement Facts. Formulas can change, so check the box you receive.
Who might consider it
- Women 40+ with low or unknown vitamin D levels
- Anyone with a family history of osteoporosis (with their doctor's input)
- People who get little sun
Before you buy
- On warfarin or another blood thinner? Vitamin K can interfere. Don't take it without your doctor.
- Already taking vitamin D? Add it up. The adult upper limit is 4,000 IU a day unless your doctor prescribes more.
- Kidney disease, high calcium or sarcoidosis? Talk to your doctor first.
- Get a blood test. It's the best way to know your dose.
A PharmD note: for bones, the big three are vitamin D, enough calcium and protein, and lifting something heavy a few times a week. Ask your doctor when a bone density scan makes sense for you. If you're not sure where to start, my free doctor questions guide can help you have that conversation.

