Step out to the garden on a late-July morning and the cucumbers have put on a hand's width overnight. You pick the eggplant and the summer squash as fast as you can reach them. This is the season when vegetables are more plentiful than at any other time of year. And yet it happens often enough: the haul sits in the refrigerator for days and goes soft.
What Changed in Vietnam in Six Years
Vietnam's health authorities surveyed adults nationwide the same way twice, once in 2015 and again in 2021. They asked about smoking and drinking, how much people moved, how many vegetables and how much fruit they ate — and on those same people they measured blood pressure, fasting blood glucose, weight, and total cholesterol. Set the two surveys side by side and six years of change comes into focus.
The number that moved most was fasting blood glucose. The share of adults above the threshold went from 12.0% to 37.7%. That rise pulled another figure up with it: the share of people carrying two or more of the four — blood pressure, blood sugar, weight, cholesterol — at the same time climbed from 27.6% to 46.6%. That's close to one in every two adults.
Habits and Health Markers Move Together
The research team sorted respondents into groups by similar habits. The largest group kept away from cigarettes and alcohol, and their blood pressure and blood sugar looked fine. Next came people whose habits were unremarkable but whose blood pressure and blood sugar had already crept up; they skewed older. The rest smoked and drank often, and their measurements had slipped right along with it. They were concentrated among men in tight financial circumstances.
Among the habits the survey grouped together were eating few vegetables and little fruit, and not moving much. Both are things anyone who keeps a garden touches every day. Vietnam's numbers don't transfer to Korea as they are. But the direction of travel — more meals bought and eaten out, more hours spent sitting — looks much the same in both countries.
What You Can Do in the Summer Garden Today
The World Health Organization recommends more than 400g of vegetables and fruit a day. One cucumber and two tomatoes get you nearly halfway there. Cucumber, summer squash (aehobak, the pale Korean variety), eggplant, and tomato are full of water and fiber and low in calories, so they let you make a meal bigger without making it heavier. Put fiber-rich vegetables alongside a meal and blood sugar rises more gently afterward. The evidence on that point is reasonably solid. There are also reports that eating the vegetables before the rice helps, though it's early to call that settled.
The garden work itself counts as movement. If watering, weeding, and setting stakes leave you a little short of breath, that's moderate-intensity activity. The WHO's recommended 150 minutes a week comes out to roughly 20 minutes a day — a morning and evening round in the garden can cover it.
- Put the cucumbers and eggplant you picked on the table that same evening. The moment they go into the refrigerator, they get pushed back by days.
- Fill half the plate at one meal with vegetables from the garden. Go lighter on the seasoning and you can eat more without eating saltier.
- Instead of doing all the watering in one morning pass, split it between morning and evening. Your time on your feet goes up on its own.
Blood pressure and blood sugar are not things garden vegetables alone can turn around. But as the Vietnamese survey showed, risk factors tend to show up together, in the same person. Tonight, make a cucumber you picked an hour ago the first dish on the table.
Source · Vietnam national survey of chronic disease risk factors, published in an international public health journal
