[Day 17] Switch on Diet : The Role of Digestive Health in Weight Loss

Today marks the 17th day of my Switch On Diet journey. While I’ve seen many positive changes—especially in body composition and energy levels—there’s one issue I’ve had to deal with lately: constipation. Since I’ve been eating less overall, especially during fasting days, I noticed that my digestion has slowed down. It wasn’t painful or severe, but enough to make me feel a little bloated and uncomfortable.

To help support my gut, I started taking probiotics, something I used to take irregularly. I also made an intentional effort to eat more fiber-rich, fermented foods. In Korea, one of the best traditional options for this is doenjang soup or cheongguk-jang(fast-fermented bean paste). It’s not only comforting and rich in nutrients, but also great for digestion. So today, I had an extra bowl of doenjang soup and felt a little lighter and better by the evening.

switch on diet, doenjang soup

Why Gut Health is the Foundation of Effective Weight Loss

You might be surprised to learn that your gut does much more than digest food—it actually plays a critical role in fat storage, metabolism, hormone regulation, and even hunger signals. This means that even if you’re eating less and exercising more, poor gut health can sabotage your results.

Here are a few scientifically supported ways your gut influences your weight:

1. Gut Microbiome and Metabolism

A healthy gut microbiome (the trillions of bacteria living in your intestines) helps break down food efficiently, extract nutrients, and even regulate how much energy your body stores as fat. Some studies show that people who are overweight often have lower microbial diversity.

2. Inflammation and Weight Retention

An unhealthy gut can lead to chronic low-grade inflammation, which interferes with insulin sensitivity and fat metabolism. This kind of “invisible” inflammation can make weight loss incredibly difficult, especially in midlife when hormonal changes already challenge metabolic function.

3. Leaky Gut and Cravings

Poor gut lining integrity (often called “leaky gut”) can increase food sensitivities and even sugar cravings. This imbalance affects your brain via the gut-brain axis, making it harder to control emotional eating or stick to a plan.

Natural Ways to Support Gut Health on a Diet

If you’re following a structured plan like the Switch On Diet, here are some tips that have worked for me and may help you too

Switch on Diet, gut food
  1. Stay hydrated – Drinking enough water helps move fiber through your digestive system.
  2. Eat fermented foods – Kimchi, yogurt, miso, and kefir are great natural sources of probiotics.
  3. Choose soluble fiber – Found in oats, bananas, apples, and sweet potatoes, this type of fiber feeds your good gut bacteria.
  4. Add prebiotics – Garlic, onions, leeks, and asparagus support probiotic growth.
  5. Take probiotics if needed – Especially if your intake of fermented foods is low.

Switching to a lower-calorie or intermittent fasting lifestyle, like with the Switch On Diet, often reduces overall food volume. While this is good for weight loss, it can slow down digestion unless balanced with proper gut care.

Midlife Women and the Gut Connection

Women in their 40s and 50s often struggle with both weight gain and digestive issues, especially during perimenopause and menopause. Hormonal shifts, slower metabolism, and increased stress all affect gut function. That’s why diets like the Switch On Diet work well—not just for reducing fat, but for healing from the inside out.

👉 You can’t starve your way to a healthier body. If your gut is inflamed or imbalanced, you may lose weight very slowly or not at all, even with a strict diet. That’s why addressing gut health is non-negotiable.


Final Thoughts

Today’s gentle reminder is this: don’t just eat for calories—eat for your gut. When your digestion is happy, your energy stabilizes, your skin glows, and yes—your weight begins to shift naturally.

If you’re struggling with bloating, constipation, or low mood during your weight loss journey, don’t ignore it. Healing your gut may be the missing piece you’ve been looking for.