Looking for ideas, open to any amount of mechanistic explanation or empirical evidence or anecdotes, I'm just at a loss.

I am extended nursing an older toddler and plan to be nursing very often in the next twenty years (if I have more children). I am quite fat despite eating maybe 2500-3300 calories (which is only a little bit more than I have always eaten including while slim). When I eat less than this I immediately have a whole host of health problems. The 'low fat' idea is similarly out as it is inappropriate given my body is already depleted from pregnancy, birth and multiple years of breastfeeding. I resorted to low-carb at my high weight which helped me lose 10kg very easily, and it felt very healthy and natural, but I don't believe it is healthy/sustainable for a longer period of time so have stopped. Pls don't say I ruined my metabolism with this as Peat himself wouldn't seem to agree and I just don't think I did, my body seems in better shape overall now than it was then.

I am tall and moderately active, my bf% is probably about 38%, I have a good and healthy body shape, but I am just about 15kg fatter than I should be. I feel I am also retaining a great deal of water. Some muscle issues and weaknesses through my core are contributing to poorer digestion and hunger signalling. I wasn't fat growing up and no-one in my family is though they tend towards height and muscularity.

Thyroid? Other supplements? Mold detox? Eating even more? Weight training? Pls share ideas or link to any forums/people who have discussed this.

Edit: I eat well eg potatoes, meat, eggs, organs, yoghurt, fruit and vegetables, rice, sometimes junk but rarely. Lots of saturated fat and gelatine. No gluten, no nicotine, no alcohol, and no coffee - I get insomnia from 1 coffee in the morning, which wasn't always the case, I used to drink it heavily.

Abstract

We investigated the influence of varying dietary polyunsaturated fatty acid (PUFA)/saturated fatty acids (SFA) ratios on insulin resistance (IR), fatty acid metabolism, N-acylethanolamine (NAE) bioactive metabolite levels, and mitochondrial function in lean and obese Zucker rats in a model designed to study obesity and IR from overnutrition. We provided diets with 7% fat (w/w), with either a low PUFA/SFA ratio of 0.48, predominantly comprising palmitic acid (PA), (diet-PA), or the standard AIN-93G diet with a high PUFA/SFA ratio of 3.66 (control, diet-C) over eight weeks. In obese rats on diet-PA versus diet-C, there were reductions in plasma triglycerides, cholesterol, glucose, insulin concentrations and improved muscle mitochondrial function, inflammatory markers and increased muscle N-oleoylethanolamine (OEA), a bioactive lipid that modulates lipid metabolism and metabolic flexibility. Elevated palmitic acid levels were found exclusively in obese rats, regardless of their diet, implying an endogenous production through de novo lipogenesis rather than from a dietary origin. In conclusion, a reduced dietary PUFA/SFA ratio positively influenced glucose and lipid metabolism without affecting long-term PA tissue concentrations. This likely occurs due to an increase in OEA biosynthesis, improving metabolic flexibility in obese rats. Our results hint at a pivotal role for balanced dietary PA in countering the effects of overnutrition-induced obesity.

https://pubmed.ncbi.nlm.nih.gov/38004155/

Recently I went back to eating seed oils due to the mainstream defending for them everywhere again, honestly i was like maybe i could save a little money using cheaper oils.

first few days was alright i even felt more energized, until things starts to feel really off( low mood persists for weeks) Changing back to whole milk and a little bit of olive oil pretty much fixed my mood issues. This paper I just found could probably confirm what happened to me.