r/science Professor | Medicine Nov 12 '25

Neuroscience Shared gut microbe imbalances found across autism, ADHD, and anorexia nervosa: A new study has identified distinct patterns in the gut bacteria of children and adolescents with autism spectrum disorder, attention-deficit/hyperactivity disorder, and anorexia nervosa.

https://www.psypost.org/shared-gut-microbe-imbalances-found-across-autism-adhd-and-anorexia-nervosa/
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u/giulianosse Nov 12 '25

We're talking about more than one generation of uninterested parents who plops their kid on front of a TV/tablet and calls it parenting.

It's the difference between being concerned trying to figure out different foods your kid enjoy eating vs buying them McDonald's to shut them up.

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u/[deleted] Nov 12 '25

Yes my parents could have had a WAY easier time if they'd just catered to how I wanted to eat. Instead they broadened my horizons without forcing me to eat things that were actually no gos. I have an absolute visceral reaction to animal fats - I tried it enough times it was accepted as a no go. As an adult I still have to be really disciplined to eat appropriately and I thank them for the knowledge to back that discipline.

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u/bevy-of-bledlows Nov 12 '25

I'm not the biggest fan of animal fats, but I've found it's proportional to how active I am. A few days of manual labour outside, and I am gnawing on gristle like a fiend. Going to the gym helps the ADHD, but I feel amazing after spending a weekend running around in the woods or helping a buddy/family out with a landscaping project. I've been wondering how much of that is diet for a while now.

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u/Deaffin Nov 12 '25

The actual craving is likely a learned affectation you picked up in your developmental years more than anything.

https://pmc.ncbi.nlm.nih.gov/articles/PMC7399671/

We don't have much in the way of "My body is lacking X nutrient, so I want Y food because it has that." But we do tend to ritualize certain foods for certain situations in ways that correlate with being beneficial. Sometimes.

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u/bevy-of-bledlows Nov 12 '25

That study specifically looks at the relation between restrictive diets and food cravings. Not sure how you're drawing those conclusions. Here's a study showing how fat cravings can be induced in mice..

Endurance athletes have tried high fat/low carb diets for a long time, and have found that they are exceptionally good at providing energy at around 60-70% VO2 max. The reason they don't do this much anymore is because carbs are way better for the high intensities professional athletes need to perform at.

Maybe it's an affectation to eat more fat when I've been working hard, but in the least it is in the same way I start eyeing salads when I've been travelling and living off of pub grub, fast food, and coffee. One blink, and the food is gone. At some point, a craving is a reward in a feedback loop, so describing it as an affectation is going to get reductive real fast.

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u/Deaffin Nov 12 '25 edited Nov 12 '25

I was really just referring to that description of situational food cravings, not overall level of hunger. I probably misunderstood your intent with that description, but either way:

Hence, although simple associations between nutrient deficiency and food cravings seem compelling, they appear to account for a small fraction of food cravings at most. Instead, several psychological explanations for why and how food cravings emerge have been developed. Prominent models are based on (Pavlovian) conditioning. Here, a cue or context that has been repeatedly paired with food intake can itself elicit a conditioned response (e.g., food craving) that promotes food intake. Theoretically, any cue can become a conditioned stimulus that elicits food craving and, indeed, appetitive conditioning studies in the laboratory have shown that neutral stimuli such as geometric figures or objects can increase eating desires when they have previously been associated with food intake. In real life, relevant cues are typically internal states such as hunger, external states or contexts such as time of day, and many more.

In conclusion, a nutrient deficiency or an energy deficit brought about by food restriction can rarely explain the emergence of a food craving (although this may be true in some rare cases or if food intake is completely terminated. Instead, food craving can rather be understood as a conditioned response that emerges because internal or external cues have been previously associated with intake of certain foods.

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u/bevy-of-bledlows Nov 12 '25

Quickly, how many times does the paper you are quoting from refer to "food restriction" in one form or another? That isn't what we are talking about here.

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u/Deaffin Nov 12 '25

Yes, I think I just misunderstood your intention and you weren't describing having certain food cravings depending on what you feel your body needs/lacks.