Postpartum Food Traditions

In Korea, the weeks after giving birth have their own name and their own food. Sanhujori (산후조리) means caring for the body after childbirth: resting, staying warm, eating well and being looked after by others. Its best-known dish is miyeok-guk, seaweed soup, traditionally a new mother's first meal. This page describes the customs, separates tradition from evidence where research allows, and points out where care is needed. It is not a substitute for advice from the clinicians looking after a mother and baby.

The shape of sanhujori

Korean tradition places special weight on the first three weeks after birth, a period known as samchilil (삼칠일, "three sevens"). Researchers studying Korean mothers describe a cluster of core ideas: keep the body warm and avoid cold, rest, eat well, avoid overexertion and keep clean. In Korean medicine, a range of later aches and symptoms is attributed to poor postpartum care, under the name sanhupung. In one qualitative study, Korean mothers described an ideal postpartum care period averaging about ten weeks, much longer than a typical stay at a care center.

Today much of this care takes place in sanhujoriwon (산후조리원), postpartum care centers where many mothers stay for the first weeks after leaving the hospital, with meals planned around postpartum traditions.

Miyeok-guk, the first meal

The Encyclopedia of Korean Culture records the custom of serving a new mother white rice and seaweed soup as her first meal, called cheotguk-bap (첫국밥). It explains the custom by a traditional belief that the iodine in miyeok helps breast milk flow. Small rituals grew around the soup: seaweed for a new mother was chosen broad and long and bought without haggling, and it was not snapped, because folk belief held that breaking it could bring a difficult birth. The soup also became the standard birthday dish, a reminder of the mother's first meal; see life ritual foods.

The custom remains strong. In a 2018 survey of 221 mothers in Gyeonggi Province, about 63 percent chose seaweed soup as their first meal after giving birth. The authors note that the soup is valued as a source of calcium, fiber and iron.

Tradition and evidence

Some elements of sanhujori fit easily with general postpartum advice: rest, help with household work and infant care, and regular, nourishing meals. Warm, soft, simple food is easy to eat while recovering. Other beliefs have been studied less. The idea that seaweed soup increases breast milk is a long-standing tradition rather than a finding from clinical trials.

Food restrictions are a common part of postpartum and breastfeeding custom. A 2017 survey of 145 breastfeeding mothers at a Seoul hospital found that most limited several foods, most often caffeine, spicy food, raw food, cold food and sikhye, and that most did so for vague reasons. The authors' literature review found no foods that breastfeeding mothers must avoid outright unless the baby reacts to them, and concluded that many restrictions were unnecessary. Specific advice about caffeine, alcohol or a baby's reactions should come from a clinician.

Iodine: the main caution

Seaweed is very rich in iodine, and eating miyeok-guk at several meals a day for weeks adds up. The details, including Korean and US intake guidelines, are on seaweed and iodine. In brief, Korean postpartum women often take in iodine well above usual recommendations in the first weeks after birth.

Research on the effects is mixed and still developing. A 2025 follow-up of 684 Korean mothers found no link between high postpartum iodine intake and thyroid disease in the mothers, or with their children's growth and development, over three years, though the authors called for larger long-term studies. On the other side, a 2026 report described three breastfed infants of Korean descent with transient hypothyroidism associated with their mothers' heavy seaweed-soup intake. The authors urged clinicians to ask about maternal diet.

Sensible takeaways:

• Tell your care team: Mention seaweed soup intake to your obstetric provider and your baby's pediatrician, especially if you are breastfeeding.
• Thyroid conditions: Anyone with a thyroid condition should ask how much seaweed is appropriate.
• Vary the menu: Miyeok-guk can be one dish among many rather than every meal. Soft rice, juk, mild soups such as mu-guk, tofu, eggs, vegetables and fruit all fit the warm, gentle spirit of sanhujori.
• Kelp and supplements: Kelp stock and concentrated seaweed products can be much higher in iodine than miyeok. Check with a clinician before using supplements.

A tradition of care

At its heart, sanhujori is about a community looking after a new mother, and the bowl of soup is part of that. Keeping the custom while paying attention to how much seaweed is eaten lets families honor the tradition and stay within what current research supports. See also yaksik dongwon for the broader idea of food as care.