PeriodsEvidence check
Vitamin E for Period Pain: Why Trial Selection and Dose Details Matter
An early school-based trial reported large benefits. Reviews reached different conclusions, and a newer study combined vitamin E with vitamin D.
ArticlesTopic 05
Periods
Leaks, heavy days, stains and surprises. A calm plan for every part of the month.
PeriodsEvidence check
Zinc for Period Cramps: Trial Doses and What Improved
Two trials measured different outcomes, and their zinc-sulfate amounts should not be copied onto a supplement label.
PeriodsEvidence check
Does Cinnamon Work as Well as Ibuprofen for Period Pain?
The direct comparison favored ibuprofen. Reading the original capsule trial also exposes limits that a claim of natural cramp relief can leave out.
PeriodsEvidence check
Fennel for Period Pain: Extract Trials, Tea Claims and Uncertain Safety
A small capsule trial favored fennel. Reviews found encouraging pain results, inconsistent placebo comparisons and too little safety reporting.
PeriodsEvidence check
Vitamin B1 for Period Pain: What the 87% Cure Claim Leaves Out
An older trial's headline combined results after both groups had taken thiamine. Later studies report pain relief, with substantial reporting limitations.
PeriodsEvidence check
Do You Need Vitamin C With Iron Pills? What the Anemia Studies Found
A 440-person trial found comparable hemoglobin recovery with iron alone. A later review found a small benefit, while US and UK guidance disagree.
PeriodsEvidence check
Do Periods Sync When Women Live Together? What Studies Show
Many women are sure their periods sync with roommates, sisters or friends. In a study of 186 Chinese women in dorms for over a year, they didn't, and a reanalysis found the famous first study's syncing was at chance level. A smaller Indian study of roommates claimed a modest shift. German researchers also report that some long cycles briefly line up with the moon. Here is what the evidence shows and why syncing feels so convincing.
PeriodsEvidence check
Does Acupressure Help Period Cramps? What Trials Show
Acupressure is free, drug-free and something you can do yourself. A 2025 review of 23 trials found it eased period pain more than fake acupressure, and side effects were mild. A wider review of non-drug options agreed it helped, though exercise, acupuncture and heat ranked higher. The catch: most of the trials were small and low quality. Here is what the evidence shows and how to fit it into a cramp plan.
PeriodsEvidence check
Heavier Periods With a Copper IUD: Do They Settle? What Studies Show
A copper IUD can make periods heavier, longer and more painful. In a study of 1,947 first-time users followed for a year, bleeding and pain during periods tended to ease over time, though spotting between periods didn't. A Cochrane review of 21 trials found anti-inflammatory painkillers and a few other options may help, on low-quality evidence. Here is what to expect and when to get checked.
PeriodsGuide
After Ulipristal: When to Restart Hormonal Contraception
The five-day wait after ella differs from levonorgestrel advice. Get a written restart date and backup plan for your usual contraception.
PeriodsEvidence check
What Makes Period Cramps Worse? Smoking, Stress and Sleep Studies
Painful periods run in families, but everyday factors seem to matter too. Pooling 24 studies with 27,091 women, smokers were about 1.45 times as likely to have painful periods as non-smokers. A review of 77 studies linked cramps with stress, sleeping under 7 hours, going to bed after 11 p.m. and being underweight. These are associations, not proof, but several are things you can change.
PeriodsEvidence check
10-Day Periods in Perimenopause: How Common They Are, and When to Get Checked
In a study that followed 1,320 women through the menopause transition with daily bleeding calendars, 91% had at least one period that ran 10 days or longer. Long periods are common in these years. ACOG still says bleeding that lasts more days than usual is worth an appointment. Here is what the numbers show and what to bring.
