
A new test kit checks for hidden iron deficiency using menstrual blood, and it’s super simple to use.
Have you ever wound up dragging yourself out of bed in the morning, feeling exhausted even after a full night’s sleep? Or have you often find yourself zoning out at work? While stress and poor sleep quality might be the more common culprits, there might be a hidden player at work: iron deficiency.
Iron deficiency is especially common among women, particularly those who menstruate, with frequent iron loss through periods known as “hidden anemia.” In those with this condition, hemoglobin levels look completely normal on standard blood tests, but ferritin, an indicator of the body’s stored iron, is low. With this deficiency easy to miss, symptoms like fatigue, lightheadedness, and headaches often go unexplained or attributed to another cause.
▼ That headache might not just be simple stress.
The Sofy brand from health and hygiene product manufacturer Unicharm has just announced a clever and simple way of checking for iron deficiency without needing a doctor-administered blood test. The new product, aptly named Sofy Menstrual Blood Iron Deficiency Check Kit, is being offered at selected retailers, Amazon Japan, and Unicharm’s online store. The kit includes special sheets that simply layer on top of your usual sanitary napkin, so those with heavy flow don’t need to be concerned of any spillage as a result of using the kit. Much like a pregnancy test, when menstrual blood reaches the tester’s orange mark, lines will appear.
▼ The technology behind the kit is described as Japan’s first, using an immunochromatographic method to detect iron-storage indicators in menstrual blood.
One line suggests a possible iron deficiency, while two indicate a low likelihood. It’s really as simple as that.
▼ They’ve even got a video to prove it’s easy.
According to Japan’s Ministry of Health, Labour, and Welfare around 65 percent of Japanese women in their 20s to 40s are affected by anemia or hidden anemia, yet awareness of this common condition remains low. A recent survey run by Unicharm found that 80 percent of women feel tired from the moment they wake up, but only around 20 percent suspect iron deficiency as the cause, with most considering it the result of poor sleep or stress. Unicharm hopes this new product will help close that awareness gap by making iron deficiencies easier to notice and allowing women to incorporate countermeasures into their daily life routines.
Related: Unicharm Online Store, Sofy Menstrual Blood Iron Deficiency Check Kit Amazon Japan listing
Source: PR Times, Unicharm
Top image: Pakutaso
Insert images: Pakutaso, PR Times
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]



Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
161-year-old Kyoto confectionary maker releases new edible Pokémon lineup
7-Eleven Japan is releasing Greedy chocolate chip and whipped cream sandwiches
Studio Ghibli’s president is leaving the company. Will it change how they make anime?
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
161-year-old Kyoto confectionary maker releases new edible Pokémon lineup
7-Eleven Japan is releasing Greedy chocolate chip and whipped cream sandwiches
Studio Ghibli’s president is leaving the company. Will it change how they make anime?
Hundreds of rose bushes in bloom at Tokyo’s off-the-beaten-path, next-to-the-tracks flower street
7-Eleven Japan now has ramen machines…but only at 41 stores
Starbucks Japan adds a new Frappuccino and Milk to the menu, but are they worth the calories?
Saltiest ramen in Japan? Ikebukuro White goes viral for crazy salt levels
Japan now has gyoza doughnuts, and they taste like no other doughnut we’ve tried before
Starbucks Japan releases two new “chunky” drinks… and matching gel designs for our nails
Mt. Fuji hot spring inn gets even more beautiful after dark with Firefly Festival
Japan releases new ramen sandwiches… that don’t taste like ramen
This train station bento boxed lunch shop has been in business for nearly 100 years
Don’t miss the Tokyo Tower City Light Fantasia ~Summer Landscape 2026~ event during your travels
McDonald’s Japan hack: Make a Chicken Tatsuta in five minutes anywhere in the world
Japanese criminals are now using crabs to hunt for burglary targets
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
The average age of Japan’s hikikomori shut-ins is getting older, survey shows
Japan enters Golden Week vacation period, survey shows one in three plan to ride it out at home
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Brand-new Pokémon manhole covers coming to help the recovery of a disaster-stricken part of Japan
Japan’s awesomely beautiful Alpen Route snow corridor is now open
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Injuries on stairs in Tokyo highlight an overlooked design flaw
Move aside, convenience store egg sando – there’s a better version of the iconic sandwich in Japan
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Hundreds of rose bushes in bloom at Tokyo’s off-the-beaten-path, next-to-the-tracks flower street
7-Eleven Japan now has ramen machines…but only at 41 stores
Starbucks Japan adds a new Frappuccino and Milk to the menu, but are they worth the calories?
Saltiest ramen in Japan? Ikebukuro White goes viral for crazy salt levels
Japan now has gyoza doughnuts, and they taste like no other doughnut we’ve tried before
Starbucks Japan releases two new “chunky” drinks… and matching gel designs for our nails
Live-action Princess Mononoke stage cast appears in costume for first time[Video]
7-Eleven Japan upsizes popular products like egg sando and pork ramen but how big are they really?
Japan’s life-size moving Gundam closes down, gets sent off in style with fireworks, drone art 【Video】
Nintendo reveals live-action Legend of Zelda movie is coming sooner than we’d thought
“They’ve got be kidding me.” – Mayor in Japan fed up with off-season Mt. Fuji hikers needing rescue
Japan’s newest life-size Gundam is finished, receives Shinto blessing in Osaka【Video】
Tokyo’s new life-size Gundam giant robot statue to be completed, open to public next month
Japan releases new ramen sandwiches… that don’t taste like ramen