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Copyright © 2025 Foodies Only
Copyright © 2025 Foodies Only
7 min
21/11/2025
Did you ever wonder what would happen to your body if you went vegan or if you are planning to become vegan? From gut health to mental health to skin to digestion, this article looks at the changes that your body goes through. While initially, it might be a bit difficult if you have never gone vegan before, the results will amaze you. Read this article to know more.
Switching to a vegan diet, even temporarily, is one of the simplest ways to observe how powerfully food shapes your body and brain. By removing all animal products like meat, dairy, eggs, and fish, your body is forced to rely solely on plants for nutrients. This shift has an instant effect on your metabolism, hormones, and how your gut microbes behave.
Many scientific studies have been done on a vegan diet. Researchers from Oxford and Harvard have found that plant-based diets can lower inflammation, stabilise blood sugar, and improve vascular health within weeks. On the mental front, they noted that the abundance of phytonutrients and antioxidants enhances serotonin activity, which often leads to sharper focus and improved mood.
However, this journey is not without its struggles. Your body needs time to adapt to fibre-heavy meals, new protein sources, and lower fat intake. Read this article to know more about the journey of being a vegan, starting with 30 days.
The first few days, in fact, a week of going all vegan can feel refreshing as well as confusing for your system. In vegan eating, your fibre intake is doubled overnight, which is 30 grams or more, from 15 grams, which speeds up your digestion and changes gut bacteria composition. Studies show that within five days, populations of Bifidobacteria (good gut bacteria) start to rise, helping regulate bowel movements and immunity. However, this rapid change may also cause temporary bloating or fatigue as your body adjusts to metabolising complex carbohydrates instead of animal fats. Protein digestion slows slightly, leading to a mild energy dip, something that gradually stabilises along with the gut microbiome.
By the second week, inflammation markers in the blood begin to drop. Research published in the Nutrients Journal shows that plant-based diets reduce C-reactive protein (CRP) levels, which is a key sign of systemic inflammation. The antioxidants and polyphenols found in fruits, nuts, and greens help the body fight oxidative stress. This internal repair work often reflects on your skin. Sebum (oil) production is regulated, reducing acne flare-ups. Vitamin A from carrots and beta-carotene-rich foods boosts cell renewal, leading to that post-vegan glow. Internally, the increased magnesium and potassium intake supports heart health and steadier energy release throughout the day.
In week three, the body finds its rhythm. Blood sugar stabilises, thanks to the high-fibre diet, preventing insulin spikes and energy crashes. This also has a positive effect on mood and concentration. According to research from Frontiers in Nutrition, a plant-based diet enhances tryptophan metabolism, which is the amino acid that helps produce serotonin, the feel-good hormone. Cortisol (the stress hormone) levels may also be reduced, especially if caffeine and processed foods are limited. Mentally, people often report lighter moods and sharper focus. It is not just psychological; omega-3 fatty acids from walnuts, chia, and flaxseeds actively support brain function, improving neurotransmitter efficiency.
By the final week, your body has largely adapted to plant-based fuel. Studies from The American Journal of Clinical Nutrition show that cholesterol levels can drop by 10–15 per cent within a month of removing animal fats. Blood pressure normalises as arterial flexibility improves, and the body starts burning energy more efficiently. Mitochondria, the body’s energy factories, benefit greatly from plant antioxidants like coenzyme Q10 and polyphenols. This results in better endurance, reduced post-meal fatigue, and a lighter feeling overall. Mentally, the consistent serotonin production supports more stable moods, while improved gut-brain communication enhances focus and calm.
While a 30-day vegan diet is not a miracle cure, but it is a fascinating biological experiment. Your gut microbiome shifts, inflammation decreases, metabolism becomes more efficient, and your brain benefits from nutrient-rich food chemistry. While supplements like B12 and iron might still be needed long-term, even a short stint on a plant-based diet can reset your internal systems, making you more aware of what your body needs.