Prevent Vitamin C Deficiency! 5 Ingredients That Pair Perfectly with Morning Rice with Egg｜The Shortest Route to Wellness According to a Registered Dietitian

2025年12月22日
Prevent Vitamin C Deficiency! 5 Ingredients That Pair Perfectly with Morning Rice with Egg｜The Shortest Route to Wellness According to a Registered Dietitian

1) Egg Over Rice Tends to Be the "Right Choice" for Breakfast, But It Has Weaknesses

Egg over rice (TKG) is a classic menu item that can be eaten quickly even on busy mornings, providing both a staple (rice) and protein (egg) in one go.
Its strength lies in the fact that it can be made as long as you have rice and eggs at home, even on days when you "don't have an appetite in the morning," "lack the energy to cook," or "find it bothersome to stop by a convenience store." The ease of securing protein, which is the foundation for building the body, is especially helpful for busy people.


However, nutrition has its "strong points" and "weak points." While TKG makes it easy to get protein and energy,it is weak in terms of nutrients derived from vegetables and fruits.
The prime example is "Vitamin C." The composition centered on rice, egg, and soy sauce makes it difficult to sufficiently meet Vitamin C needs. Therefore, rather than "giving up TKG,"adding "one more item" to enhance completenessis a practical solution.



2) Why Is Vitamin C Important in the First Place? What Happens If You Lack It?

Vitamin C (ascorbic acid) is an essential water-soluble vitamin for our bodies, known for the following functions:


  • Involvement in Collagen Production (related to the "foundation" of skin, blood vessels, bones, gums, etc.)

  • Antioxidant Action (involved in defense against oxidative stress in the body)

  • Helps Iron Absorption (particularly aids the utilization of non-heme iron from plant-based foods)

  • Involvement in a Wide Range of Physiological Functions, Including Immune Function


Additionally, it is known that prolonged extreme deficiency can lead to scurvy (bleeding gums, subcutaneous bleeding, fatigue, etc.). While severe deficiency is not common today,a lifestyle with few vegetables and fruits can gradually lead to a "tendency towards deficiency". Office of Dietary Supplements+1



3) How Much Is Needed Per Day? Knowing the "Guideline" Makes Addition Easier

In Japan, the "Dietary Reference Intakes for Japanese (2025 edition)" recommends a daily intake of100mg/day of Vitamin C for adults. Ministry of Health, Labour and Welfare+1

On the other hand, materials from the NIH (National Institutes of Health) in the United States provide recommended amounts based on age and gender (e.g., 90mg for adult men, 75mg for adult women), with the understanding that smokers require additional amounts. Office of Dietary Supplements+1


The key here is not the numbers themselves, but the idea of **"consistently including about this much every day."**
Since Vitamin C is water-soluble and difficult to store in the body for long periods, "frequent and consistent" is more practical than "occasional large amounts." Additionally, it has been reported that absorption rates decrease with high doses. Office of Dietary Supplements



4) Why TKG Tends to Lead to Vitamin C Deficiency (and the Clear Direction for Addition)

The basic composition of TKG is "rice + egg + soy sauce (+ seaweed, etc.)." The main nutrients contained here are energy, protein, fat, some vitamins, and minerals.
On the other hand, Vitamin C is mainly obtained fromvegetables, fruits, and tubers, and cannot be expected from eggs or white rice. In other words, the more you continue a TKG lifestyle, the more likely Vitamin C will be "left behind" unless you are conscious of it.

Conversely, the solution is simple—just add a "Vitamin C provider" to your morning TKG.



5) Conclusion: Five "Vitamin C Foods" That Pair Well with Egg Over Rice

From here, we introduce foods that are easy to pair with breakfast and have high Vitamin C addition efficiency. The numbers are based on the values from the Ministry of Education, Culture, Sports, Science and Technology's "Standard Tables of Food Composition in Japan (8th Revised Edition) Supplement 2023" for edible parts per 100g. Food Composition Database+4Food Composition Database+4Food Composition Database+4



① Red Bell Pepper (Red Capsicum)... A Top Class for "Earning with Small Amounts"

Just adding a bit of "raw thin slices" to your morning side dish makes it much easier to reach your goal.
Recommended is to mix withsalt + sesame oil (or olive oil), or with a small amount oftuna + vinegar. No need for cooking, and minimal use of a knife.



② Broccoli... Reinforces "Nutrients Often Lacking in TKG"

Broccoli contains not only Vitamin C but also dietary fiber and folic acid, making it an easy food to fill the "nutritional gaps" in the morning.
The key isnot to overheat it. Quick cooking methods like microwave heating or steaming are said to help preserve Vitamin C. Safety and Efficacy Information on "Health Foods" -+1



③ Strawberries... Strong in the "Dessert Slot"

On days when you're "not in the mood to cut vegetables" in the morning, just havinga few strawberries after TKG is fine.
Fruits require no cooking, making them significantly easier to continue.



④ Kiwi (Green Flesh)... A "Morning Fruit" That's Easy to Calculate with One Piece

Kiwi is not only easy to eat as is, but also easy to use in yogurt, etc.
The combination of "TKG + fruit" has little sense of incongruity, making it easy to make a habit.



⑤ Mandarin Orange (Unshu Mikan)... A "Stable Supply Source" Not Just for Winter

For those who prefer a "refreshing morning," mandarin oranges are a perfect match. Just peel and eat, and they are easy to store.
The less hassle, the more likely it is to last for busy people.



6) "One More Step" Candidates: Cabbage, Potatoes, and Brussels Sprouts Are Also Usable

Cabbage can be shredded, potatoes can be used in soups or microwaved, and Brussels sprouts are very strong if they are in season and easily available.



7) Tips for Eating Vitamin C Without "Wasting It" (Only the Ones That Work for Mornings)

Vitamin C is susceptible to "heat," "water," and "time," so the following tips are effective when incorporating it into your morning routine.

  • Eat Raw When Possible (such as bell peppers, fruits)

  • If Heating, Prioritize **Short Time (Microwave/Steam)**

  • If Boiling, Eat with the Soup (to Recover Dissolved Nutrients)

  • For Pre-made Dishes, Cut Just Before Eating (as Much as Possible)


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