Plenty obsessed with nutrition and its effects on (/creation of) the body. I've spent the last 10 years researching and experimenting with my body/food in response to media, studies, ideals, culturals, any kind of persuasion that promised perfect health. All of these promises are hypotheses, some scientific, some idealistic, some just plain ridiculous.
Personally, my journey with food started with indiscriminate ("normal") eating as a child, then calorie counting as a teenager, veganism as an anorexic, whole-food-plant-based (HCLF) and vegan keto (LCHF) as an orthorexic, sattvic/Ayurvedic as a yoga teacher, Buddhist/TCM vegetarian. I've also played around with Mediterranean, Blue Zone and other cultural diets. The only way of eating that I will ever subscribe to came from Michael Pollan's Food Rules: An Eater's Manual; "Eat food. Not too much. Mostly plants."
What I've come to learn, but have yet to actualise, is that each body is to an extent individual. Each one has the same basis as a living being that is made of the same elements but is influenced by its genes, upbringing and environment. Instead of trying to change my body to follow an ideal of eating, I just go day by day learning to listen to my body - how I feel about/before/during/after a particular food or meal. The "perfect" diet is one that will get you and your body to wherever it is you are going and that takes some experimentation.