The bottle in my kitchen cupboard

THE 30-SECOND VERSION

Taking vitamin D to prevent falls is no longer recommended, and the advice has reversed. Higher doses did worse, not better. Do not stop anything prescribed without asking first.

METHOD OF THE WEEK

The vitamin D question

Millions of us take it to stay upright. The recommendation has quietly turned around.

There is a white plastic bottle in my kitchen cupboard, second shelf, next to the coffee filters. Vitamin D. I have taken one most mornings for about two years, because a magazine article told me it would keep me steady on my feet, and because it seemed a small enough thing to do.

This is balance week, so I went looking for the evidence behind it, expecting to write a cheerful paragraph recommending it to you. That is not what I found. The official recommendation has gone the other way, and I had not noticed.

There is a good study behind the change, and a result in it that I did not expect at all. Before anything else, though, please do not go and empty a bottle down the sink on my say-so. I will explain why in a moment.

QUICK QUIZ · TAP TO ANSWER

A trial gave older adults four different doses of vitamin D. What happened at the higher doses?

Tap your guess. A ready-to-send reply opens. Just press send and we’ll tell you if you got it right.

More falls, not fewer

Far fewer falls

Exactly no change at any dose

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THE METHOD

Where the advice turned around

The idea made good sense. Vitamin D matters for muscle as well as for bone, older people are often low in it, and weak muscles mean falls. So for years the advice was to take it, and a great many of us did.

Then the trials came in. The task force that reviews this sort of thing for American doctors looked at twenty randomised trials. Pooling them all, the risk of falling among people taking vitamin D was 0.99 times the risk among those not taking it. In other words, essentially identical. Out of a thousand people supplemented, about five fewer had a fall, which is a number small enough to be noise.

The same review looked at broken bones and found the same nothing. Out of a thousand people supplemented, zero fewer hip fractures. On that basis the task force now recommends against taking vitamin D, with or without calcium, to prevent falls or fractures in older adults living at home.

Now the part that surprised me. At Johns Hopkins they ran a trial called STURDY, giving 688 adults over seventy one of four daily doses: 200 units, 1000, 2000, or 4000. If the vitamin helps, more of it should help more. It did not work out that way. The 2000 and 4000 groups did worse than the 1000 group, not better. The researchers concluded that doses of 1000 units a day and above did not prevent falls, and left open the question of whether the highest doses actually raise the risk.

Three things this does not mean

First, it does not mean vitamin D is bad for you. It is a nutrient your body needs, and that has not changed. What has changed is the specific claim that taking extra will keep you upright.

Second, and this matters, it does not apply to everyone. This is about healthy older people living at home, taking it off their own bat to prevent falls. If your doctor has put you on vitamin D because a blood test showed you were genuinely low, or as part of treating thin bones, that is an entirely different question and one I am not qualified to answer. Do not stop a prescribed supplement because of a newsletter. Ask the person who prescribed it.

Third, it does not mean nothing prevents falls. The very same task force that says no to the vitamin says yes to exercise, and recommends it for older adults at increased risk. Which is a tidy summary of this whole week. The side steps on Monday, the night light yesterday. Dull, free, and supported.

What I did with my bottle

I am seeing my doctor next month for something else, and the bottle is going in my pocket so I can ask her whether I have any reason to take it beyond a magazine article. That seemed a more sensible course than either carrying on out of habit or throwing it away in a huff. I will tell you what she says.

⚠ BEFORE YOU CHANGE ANYTHING

This is a conversation, not an instruction

I am not a doctor and I am not telling anyone to stop a supplement. Speak to yours first, especially if:

● Vitamin D was prescribed for you, or followed a blood test showing you were low.

● You are being treated for thin bones, have had a fracture, or have kidney or parathyroid trouble.

● You are taking a high dose on your own, above 1000 or 2000 units a day. That is worth raising either way.

When in doubt, get it checked. PainFree adds to your doctor’s care. It never replaces it.

THIS WEEK’S QUICK WINS

Three ways to spend your effort better

💊 Take the bottle to your next appointment

Do not decide this alone, in either direction. Put it in your pocket, show your doctor the dose, and ask whether you have a reason to be on it. That is a two-minute question with a proper answer.

Next visit • Bring the actual bottle

🦵 Put the effort into the side steps

Exercise is the thing the same reviewers actively recommend for people at risk of falling. A minute of Monday’s side stepping at the counter is doing more for you than the pill was.

1 minute • The recommended one

📜 Be wary of more being better

The higher doses in that trial came off worse than the modest one. With supplements, a bigger number on the label is a marketing decision, not a medical one. Worth remembering across the whole shelf.

Anytime • Bigger is not safer

RESEARCH BRIEF

Twenty trials, and a dose surprise

The United States Preventive Services Task Force reviewed twenty randomised trials of vitamin D, with and without calcium. For falls, the pooled relative risk was 0.99, meaning no measurable difference. For hip fractures it was also 0.99, an absolute difference of zero per thousand people supplemented. The task force now recommends against taking it for either purpose in community-dwelling older adults. Separately, the STURDY trial at Johns Hopkins randomised 688 adults aged seventy and over to 200, 1000, 2000, or 4000 units daily. The two highest dose groups fared worse than the 1000 unit group rather than better. And an earlier study of a single very large annual dose found more falls and more fractures, not fewer. Meanwhile the same task force recommends exercise for older adults at increased risk of falling, which tells you where the evidence has settled.

0.99

the relative risk of falling on vitamin D, against not taking it

688

adults over seventy given one of four daily doses

Higher

doses came off worse than the modest one, not better

A sensible idea that did not survive being tested properly. That happens, and the honest thing is to say so.

WHAT THE EVIDENCE SAYS

Three ways to spend on falls, graded

Exercise for balance and strength

Actively recommended for older adults at increased risk, and it costs nothing. This is where the evidence points, dull as it sounds.

Vitamin D, taken to prevent falls

Now recommended against for healthy older people living at home. Twenty trials found no benefit, and high doses looked worse. A different matter entirely if your doctor prescribed it.

Vitamin D for a diagnosed deficiency

A separate question with a separate answer, and one for your doctor rather than for me. Correcting a genuine shortfall is not the same as topping up someone who is fine.

Always check with your doctor or pharmacist before starting or stopping a supplement.

WORTH KNOWING

5 in 1,000

Across all those trials, supplementing a thousand people meant about five fewer of them had a fall. Put the other way, 995 saw no difference at all. When a result is that small, it is usually indistinguishable from chance, and that is exactly how the reviewers read it.

From the pooled trial evidence.

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