Dieting as a Renotonia: Weight Comes On More Easily Than You’d Expect — and Constipation Is the Thing to Watch

Because Renotonia (수양체질) belongs to the Soeumin group, people often assume it must be a naturally lean constitution that never has to think about weight. In Korean Traditional Medicine (KTM), the traditional healing system of Korea also known as Hanbang (한방), and within Eight Constitution Medicine (ECM), that assumption does not hold up in practice. Obesity turns out to be fairly common in Renotonia. Among the two Soeumin types, it is Vesicotonia that holds more of the genuinely thin. So Renotonia does have weight to manage — and alongside it, a constitutional tendency that deserves more attention than the scale: constipation.

Not the Lean Type People Assume

Renotonia has better digestive power than Vesicotonia, and it is easy to assume that a Soeumin constitution will stay slim by default. In practice that is not what I see: weight comes on in this type more readily than the reputation suggests, and obesity is fairly common among Renotonia. If you are looking for the constitution where genuinely thin builds cluster, it is Vesicotonia rather than this one.

Today’s eating habits and an environment that has removed exercise from ordinary life only make this easier. As with the other Soeumin type, the lever sits in habits rather than in sheer portion size — but Renotonia should not assume its constitution will do the work for it.

The Real Issue: Constipation

Here is what most deserves this constitution’s attention. Renotonia is prone to constipation by its very nature. And it is worth saying clearly that many people of this type never complain of constipation at all — they simply have a low frequency of bowel movements, which they have come to regard as normal for them. Whether or not it registers as a symptom, the practical response is the same and it is not complicated: make sure you are eating the foods that keep the bowel moving. For this constitution, that is the single most useful dietary habit to build.

Sweat, Seasons, and Appetite

Renotonia tires easily in spring and summer, the sweating seasons, because losing sweat weakens this type’s stamina. There is a weight-management consequence too: when this type sweats heavily, appetite becomes harder to regulate.

But the rule needs stating precisely, because it is easy to take too far. This does not mean exercise is bad, or that you should avoid working up a sweat at all. Moving the body is good — and given that weight does come on in this type, movement matters. The sweat that arrives naturally with exercise is fine. What drains this constitution is deliberately induced sweating — the sauna, the heated room, the long hot soak, piling on layers to force a sweat, or making “sweat as much as possible” the aim of a workout. Exercise freely at a comfortable intensity; just don’t chase the sweat.

What Suits and What Doesn’t

Beneficial: chicken, dog, lamb, goat, venison and beef; glutinous rice, rice, brown rice, potato and corn; seaweeds — gim, miyeok, dashima; warming aromatics such as spring onion, onion, ginger, mustard, pepper and curry; fruits including apple, citrus, black grape, mango, tomato, pear and peach; and sungnyung, nurungji, sesame, sesame oil, cinnamon, jujube, radish, young summer radish, mustard leaf, garlic, sujeonggwa, pollen, royal jelly and yuja tea.

Harmful: all cold foods — ice, ice cream, cold drinks, naengmyeon, barley tea; all raw food, including raw fish and uncooked vegetables; pork and egg white; barley and red bean; shellfish, shrimp, oyster, sea cucumber, crab, octopus, squid, snakehead and carp; fruits such as Korean melon, strawberry, banana, pineapple, melon and persimmon; and perilla, perilla oil, pufferfish, beer, cucumber, water parsley and goji-berry tea. Raw-food diets do not suit this type. Saunas, heated rooms and long half-baths are best avoided.

And the instruction that runs across the whole list: eat everything warmed.

How Strictly Should You Follow This?

Less strictly than most people assume. If you are not ill and have no active disease, eating small amounts of the foods on the harmful list is perfectly fine — and can even do you good. These lists earn their weight during illness, in recovery, or when correcting a specific problem. For a healthy person, treating them as prohibitions turns eating into anxiety, and that anxiety costs more than the food does. Manage your diet as far as your circumstances allow, and no further.

In Summary

Renotonia is not the effortlessly lean constitution its Soeumin label suggests — obesity is fairly common here, and the genuinely thin are more often Vesicotonia. So the weight does need managing, through habits rather than through constitution alone. Alongside it, watch constipation: this type tends toward infrequent bowel movements even without complaining of them, and building in the foods that keep things moving is the most useful habit available. Take care in the sweating seasons, exercise freely but don’t manufacture sweat, and eat your food warm. If constipation is persistent, painful, or newly changed, have it assessed by a clinician rather than managing it with diet alone.

Related reading: The Renotonia Constitution · Dieting as a Vesicotonia

This article reflects the clinical observations and teaching practice of Professor Seungho Baek, Professor of Korean Medicine at Dongguk University College of Korean Medicine, specializing in Pathology and Oncology.