Are you only paying attention to carbohydrates and fats? The "hidden sodium" you should reconsider while losing weight.

Paying attention to meal portions and continuing to exercise. Yet, the morning after dining out, the number on the scale has increased—have you ever felt like your efforts from the previous day were ruined because of such an experience?

This is where you might want to reconsider your salt intake. However, this isn't about "eating salt increases fat" or "cutting salt makes you lose weight easily."

The German news site "AD HOC NEWS" discussed the relationship between a high-salt diet and weight loss in an article dated October 10, 2026. It introduces the salt content in processed foods and its impact on blood pressure.

On the other hand, the original article's opening statement that "high salt intake hinders weight loss and waist improvement" lacks detailed research references. When reading the article, it's important to consider weight, water, and body fat separately.

Gaining weight is not the same as gaining fat

The scale shows more than just the weight of fat. It includes muscle, bones, body fluids, and the food and drink consumed.

Sodium in salt is a nutrient involved in fluid balance. After a salty meal, changes in fluid levels can be reflected in weight. Therefore, short-term fluctuations cannot be directly interpreted as changes in fat.

For example, concluding that "diet management failed" just because of weight gain the day after dining out is premature. Conversely, even if weight drops quickly after switching to a bland diet, it doesn't necessarily mean all of it was fat.

It's not just about "how many kilos were lost," but "what was lost." Understanding the relationship between salt and dieting starts with recognizing this difference.

In comparative trials, results for "weight" and "body fat" differed

A useful reference for considering this point is a randomized controlled trial on salt reduction and weight loss published in 2018.

The study compared a reduced-salt diet with a control diet over about two months, focusing on meals with controlled energy intake.

Although the group that reduced salt showed greater weight loss, there was no significant difference between groups in the reduction of body fat or visceral fat. Researchers explained the additional weight loss as due to a decrease in body fluid levels.

This was a preliminary trial at a single facility and does not settle the relationship between salt and obesity. Still, it shows that the result of "weight loss with reduced salt" cannot be explained as "fat burning more easily."

Interpreting the headline of the original article as "salt was the reason for not losing weight" exceeds the scope confirmed by research.

In Japan, focus on condiments as well as processed foods

The original article, based on German dietary habits, introduces the salt content in bread, processed meats, frozen pizzas, and more.

However, the source of salt intake varies by country and dietary habits. It is not appropriate to apply the explanation that "most salt comes from processed foods" overseas directly to Japanese households.

In Japan, attention should also be given to condiments like soy sauce and miso used in cooking and at the table. Materials from the Ministry of Health, Labour and Welfare's study group also show that sodium intake from home-cooked meals constitutes a large proportion in Japan.

It's not necessarily safe to assume, "I'm fine because I don't eat out" or "Japanese food has less salt."

For example, adding soy sauce to grilled fish and serving it with soup and pickles. Even with modest meal portions, this combination can lead to salt intake from multiple dishes.

It's more important to look at the entire meal rather than the impression of a single dish. Reflecting on seasoning and combinations, rather than just distinguishing between homemade and store-bought, can be helpful.

The goal is not "salt used in cooking" but the total daily amount

According to the "Dietary Reference Intakes for Japanese (2025 edition)," the target salt intake for adults is less than 7.5 grams per day for men and less than 6.5 grams for women. The WHO recommends less than 5 grams per day for adults.

These figures include not just the salt sprinkled at the table but also the salt from condiments and processed foods.

When choosing foods, it's important to check the "salt equivalent" on the nutrition label and understand what quantity, number of grams, or servings the numbers represent.

For example, if you eat 200 grams of a food labeled as "1.2 grams of salt equivalent per 100 grams," you will consume 2.4 grams of salt. When comparing, it's essential to align the units of measurement.

Even products labeled "low salt" can lead to increased intake if consumed in larger quantities. It's important to develop a habit of considering the actual amount consumed rather than relying solely on the product name.

On social media, there are voices saying "it's tough until the numbers return"

The relationship between salt and weight is also a concern on social media.

In the weight loss community "r/loseit" on the overseas forum Reddit, posts have been observed where people feel down because their weight increases by about 2 pounds, or approximately 0.9 kilograms, every time they eat salty popcorn, and it takes several days to return.

In response, replies encourage distinguishing between water weight gain and fat gain, and suggest looking at long-term trends rather than daily numbers. There were also suggestions to observe changes beyond the scale.

Conversely, there were posts from people who believed salt was stopping their fat loss and attempted to drastically reduce it.

The experiences introduced here are not direct reactions to the original article but user experiences on the same theme. The content of the posts is not medically verified and does not represent the opinions of social media as a whole.

Nonetheless, the psychology of "even if you know it's a change in water, it's tough when the numbers go up" can be understood. What is needed is not to lead to extreme dietary restrictions due to this anxiety, but to clarify the meaning of the numbers.

Rather than switching to "special salt," reconsider its usage

The original article also touches on sea salt and Himalayan rock salt, introducing the mineral content of certain sea salts.

However, containing minerals and being advantageous for weight loss or blood pressure management are separate matters. The original article does not present clinical evidence that switching to that salt makes it easier to lose weight.

Rather than relying solely on the type of salt, it is more practical to check the overall salt intake from meals.

As daily tips, consider not adding soy sauce or dressing before tasting, using spices and aromatic ingredients, and comparing the salt equivalent of similar products.

It's not necessary to drastically change all dishes from the start. Reducing "one time you added it without thinking" can also be an opportunity to review eating habits.

The value of salt reduction exists even if it doesn't show on the scale

The significance of reducing salt intake is not just about losing weight. Excessive sodium intake is related to increased blood pressure, and reducing salt is an important effort for blood pressure management.

Therefore, there is no need to think, "since I didn't lose weight, reducing salt is meaningless."

On the other hand, sodium is also a necessary nutrient for the body. The goal is not "salt removal" to move the numbers on the scale but to review excessive intake. Those receiving dietary or fluid instructions for treatment should prioritize that content.

When weight temporarily increases, instead of immediately reducing meal portions further, reflect on the seasoning and meal content from the previous day. Do not hastily conclude short-term numbers as changes in fat, but work on establishing sustainable eating habits.

Understanding salt is not about "enduring more," but it helps calmly comprehend changes in one's weight.

Sources and References

1. AD HOC NEWS: Article dated October 10, 2026. Introduces salt, weight loss, processed foods, blood pressure, and more.
   https://www.ad-hoc-news.de/wissenschaft/salz-und-abnehmen-hoher-konsum-kann-gewichtsverlust-und-taille-bremsen/70289340

2. Kang et al., 2018: Randomized trial comparing salt reduction and low-energy diet. Provides evidence distinguishing changes in weight, fluid levels, and body fat.
   https://pubmed.ncbi.nlm.nih.gov/29492213/PubMed

3. WHO "Sodium reduction": Public document on the role of sodium, recommended amounts for adults, impact on blood pressure, and methods for salt reduction.
   https://www.who.int/news-room/fact-sheets/detail/sodium-reductionwho.int

4. Tokyo Metropolitan South Tama Health Center "Tips for Delicious Salt Reduction": Target amounts for men and women based on the Dietary Reference Intakes for Japanese (2025 edition).
   https://www.hokeniryo.metro.tokyo.lg.jp/shisetsu/jigyosyo/hokenjyo/minamitama/gyoumu/eiyou/eiyou7/oisiku_genenhokeniryo.metro.tokyo.lg.jp

5. Ministry of Health, Labour and Welfare "Minutes of the Study Group on Promoting the Creation of a Sustainable Food Environment for Natural Health": Explains sources of sodium intake in Japan, including the contribution of home cooking.
   https://www.mhlw.go.jp/stf/newpage_17429.htmlmhlw.go.jp

6. Reddit "Every time I eat salt…": Confusion over weight fluctuations after salt intake and replies encouraging looking at long-term trends. Personal experiences used in the SNS introduction in the text.
   https://www.reddit.com/r/loseit/comments/1jfwh40/every_time_i_eat_salt/