Last week, a reader asked me how to handle a doctor's visit. I had answers for her from my own experience, but couldn’t point to evidence behind them.
So in typical fashion, I went looking for them in the research. And there’s quite a bit.
Researchers have run real experiments on what patients do in appointments and how doctors respond, including trials with trained actors.
The evidence says something useful about how to ask and judge the effectiveness of a doctor’s consultation. Honestly, I found that adopting these reflexes can make us all better patients and partners in our own care.
🤰🏻83% of pregnant women in a Swedish study had ferritin under 30 by the third trimester: Researchers tested 89 pregnant women in Gothenburg early and late in pregnancy. With a ferritin cut-off of 30 µg/L, iron deficiency rose from 53% to 83%. With a cut-off of 15, it rose from 15% to 39%. Anemia rose from 6% to 23%. 85% had an iron prescription by week 32, but only 16% had one in weeks 6–12. The authors can't tell whether late starts, low doses, missed doses or poor absorption explain the gap.
🌿 Curcumin and selenium eased endometriosis pain in some trials; no supplement raised pregnancy rates: A systematic review from the Medical University of Vienna covered 24 trials with 2,019 women with endometriosis. Some trials reported less pain and better quality of life, most often with specially formulated curcumin or selenium, alone or alongside the hormone drug dienogest. Supplements improved some fertility markers but not pregnancy rates, and they didn't reduce recurrence after surgery. The authors conclude supplements may support standard treatment and shouldn't replace it.
🚶🏻♀️7,000 steps three days a week halved bone-density decline in premenopausal women: A Japanese cohort tracked 3,529 women with pedometers for about 3.5 years. Premenopausal women who reached 7,000 steps on at least three days a week had about half the risk of a bone-density decline, measured by heel ultrasound or an osteoporosis diagnosis, compared with inactive women. Postmenopausal women showed no such link. Reaching the target one or two days a week showed no link at either stage. Heel ultrasound is a screening tool, not the DXA scan used to diagnose osteoporosis.
🥄 An Australian start-up launched a melt-on-the-tongue prenatal aimed at pregnancy nausea: H.E.R Code Prenatal + Postnatal is an oral-melt powder for pregnant and postpartum women who struggle with tablets because of nausea, gag reflex or taste aversion. Its iron is microencapsulated ferric pyrophosphate, and its folate comes as folic acid plus methylfolate. Ferric pyrophosphate is gentle on the stomach but absorbed less well per milligram than ferrous salts, and micronizing and encapsulating it narrows that gap. The company hasn't published the iron dose or the price. Its adherence claim rests on clinician feedback, and no study has tested it.
What happens when you ask your doctor for a specific test
Asking changes what your doctor does.
The same research shows asking can get you something you did not need, and that only about 4 in 10 requests are refused.
How the research was done
Surveys can’t reliably answer this because patients and doctors remember the same appointment differently.
Researchers sent trained actors into real appointments. The actor followed a script, and the script was the same every time except for the one thing being tested.
18 actors made 298 unannounced visits to 152 primary care doctors. The symptoms were the same every time, only the request changed.
Because nothing else varied, the differences below are caused by the asking itself.
What asking did
Some actors described major depression. Of those, 31% left with a prescription when they asked for nothing, 53% when they named a brand, and 76% when they asked in general terms.
A reasonable first step means a prescription, a referral, or a follow-up booked within 2 weeks. That was offered to 56% of those who asked for nothing and 98% of those who asked in general terms.
In short, a general request worked better than naming a product.
A 2025 review screening 6,411 papers found the same pattern across the wider literature. It also found that when patients asked for very little, the odds of being prescribed anything fell significantly.
Asking for nothing was the weakest position in the study.
How to ask
A Cochrane review covering 25 trials and 12,268 patients tested which patient behaviors change what clinicians do.
Where patients supplied information about their own symptoms and history for the doctor to see, care that followed the guidelines rose from 17 visits in every 100 to 26.
where patients used a decision aid (meaning a summary of treatment options with their risks and benefits), it made little or no difference to what the doctor did.
Giving the doctor clear information about yourself worked best.
When the answer is no
Requests were refused 88 times out of 199.
In 63% of those visits, the doctor asked why she wanted it, referred her on, or offered another explanation.
Despite receiving a no, the explanation and reasoning are actually the most important part here. You should see your provider as a partner in your care and investigation of your health. They should share their reasoning with you.
Asking still needs to defer to their experience and expertise. Otherwise, what's the point in working with this provider?
🗣️ Lead with the problem and your history, then name the test you have in mind.
“This has come up before, here is what happened, and I think it might be my iron again.” Both ways of asking worked in the trial, but opening it up produced a reasonable first step 98% of the time against 90% for leading with one named request.
How valuable was today's issue for you?
