why fat storage starts in your gut.

& how to nourish your gut to naturally support fat loss.

most weight loss advice focuses on calories in versus calories out. but emerging research reveals something far more interesting: two people can eat identical meals and extract vastly different amounts of energy from them.

the difference? their gut microbiome.

your intestinal bacteria aren't passive passengers – they're actively deciding how much energy you take from food, whether you store it as fat or burn it, and even whether you feel hungry or satisfied. understanding this shifts weight management from pure willpower to strategic microbiome support.

how gut fat storage works..

when you eat fibre, your gut bacteria ferment it into short-chain fatty acids (SCFAs) – particularly acetate, propionate, and butyrate. what’s impressive is that certain bacterial compositions are remarkably efficient at this process, extracting more calories from the same food compared to other microbiome profiles (Korbin et al., 2023).

this explains the puzzling phenomenon where some people gain weight easily despite modest food intake. their microbiome has become hyper-efficient at energy extraction – an evolutionary advantage during famine, but a metabolic liability in modern abundance.

such hyper-efficiency can be problematic, as it can reduce microbial diversity and change how short-chain fatty acids are produced. in turn, these changes can have a negative influence on appetite, fat storage and blood-sugar balance.

Your gut microbiome.

what really matters.

people living in larger bodies often have more firmicutes bacteria and fewer bacteroidetes. early studies once suggested this ratio could predict body weight, but newer research suggests that the ratio matters less than specific bacterial species and their metabolic functions (Magne et al., 2020) (Liu et al., 2021).

recent studies have zoomed in on those functions. some firmicutes strains seem to encourage fat storage, while certain bacteroidetes help your body burn fat more efficiently . however this doesn’t mean firmicutes are “bad” and bacteroidetes are “good” – each group includes hundreds of different species with unique roles.

what really matters is having a diverse, balanced community of microbes that work together to keep your metabolism steady and responsive. carrying extra weight is generally associated with reduced microbial diversity, which can affect metabolic flexibility and resilience.

how leptin resistance stops you from feeling full.

you’ve probably heard of insulin resistance, but have you ever heard of leptin resistance? it’s another form of hormonal resistance that plays a major role in weight regulation. your gut health is a big part of the picture, because your microbiome produces metabolites that directly affect how sensitive your body is to leptin.

leptin is your satiety hormone, signalling your brain when you've eaten enough. in many people carrying excess weight, the issue isn’t too little leptin, but that the brain stops responding to it – a state known as leptin resistance.

butyrate-producing bacteria (which we spoke about in last week’s newsletter) can reduce intestinal inflammation and improve the integrity of the blood-brain barrier (Canfora et al., 2015). when your gut barrier functions properly, fewer inflammatory molecules reach the brain to disrupt leptin signalling, making natural appetite regulation possible again.

the korean advantage.

traditional korean fermentation practices may offer metabolic benefits that modern science is only beginning to understand. in a recent clinical trial, adults with overweight who regularly ate kimchi saw meaningful reductions in body fat and waist size over several weeks compared to those eating less or no fermented vegetables (Lee et al., 2024).

researchers believe these benefits may be linked to Lactobacillus sakei – a probiotic strain found in kimchi that appears to support fat metabolism without unwanted side effects. Kimchi consumption also increased the proportion of Akkermansia muciniphila, while decreasing Proteobacteria, contributing to obesity reduction.

the korean concept of banchan (반찬).

small, varied fermented side dishes consumed with every meal – creates consistent microbial exposure rather than sporadic supplementation. this "little and often" approach is more effective for microbiome modulation than occasional large doses.

our Grounded Kimchi.

understanding kimchi's role in weight management, we've made our traditional kimchi available to take home .

rich in Lactobacillus and diverse lactic acid bacteria, Grounded Kimchi provides the same strains used in clinical research showing body fat reduction.

start with 1–2 tablespoons daily alongside meals.

consistency matters more than quantity – daily consumption creates the metabolic shifts research demonstrates.

available in participating stores. please check with your local Grounded Kitchen for availability.

Written by: Gabi Zaromskyte, MSc, ANutr

Registered Nutritionist | Intuitive Eating Counsellor | Holistic Health Coach