Weeds or Medicine? What Our Elders Knew About Mental Health

I was a child the first time my grandmother sent me to a field near our apartment in Pittsburgh.

It was not a cute, manicured garden; it was a literal field, the kind of overgrown, sun-baked stretch of land near our home that most people walked past without a second glance. She handed me a paper bag and pointed. Go pick dandelion greens. And don’t come back with just a little bit. She said it the way she said everything—with the quiet authority of someone who knew exactly what she was doing, even when you had no idea why.

I complained, as children do. But I picked the greens. I brought them home. She washed them, cooked them down into her collard greens, and set a plate in front of me, like she had just done something completely ordinary. She had. She had also just given me medicine. She just didn’t call it that. I had to eat every ounce of what she gave me and drink the pot liquor (likker).

Generations of Accumulated Wisdom

Our elders didn’t use the phrase gut-brain axis. They never read a study on psychobiotics or prebiotic fiber and mental health outcomes in adolescents. But they knew, the way most Black elders just know things, through generations of accumulated wisdom passed down person to person, that what you put in your body changes how you feel, how you think, how you move through the world. They knew that food was not just fuel. It was healing. They knew food is medicine. And they made sure we got our portion of it, whether we wanted to go pick it or not. How many of you grew up forcing down the liver and onions your grandmother made you eat?

The weed in the field is not a weed. Dandelion has been used as medicine across cultures for centuries in West African herbal traditions, in Chinese medicine, in Indigenous North American practice, in European folk healing. Enslaved Africans arriving in the American South recognized dandelion growing wild in the fields and incorporated it into their healing practices, just as they braided seeds into their hair and carried botanical knowledge across the Middle Passage in their memories. According to the Black Food Canon, dandelion was gathered as a field green across the South, wilted in pot likker, and used medicinally as a liver-supporting, digestion-stimulating bitter. It was not a weed. It was part of a pharmacy growing at the edge of the yard. There are so many, including red clover and plantain.

Prebiotic Fiber and a Healthy Mind

Modern science has confirmed what our ancestors practiced. Dandelion greens are rich in prebiotic fiber, the kind that feeds beneficial bacteria in the gut, as well as vitamins A, C, and K; iron; calcium; and potent antioxidants. They support liver function, reduce inflammation, and improve gut motility. But here is the connection our elders did not say, but our generation needs to hear: A healthy gut is the foundation of a healthy mind.

The gut is the second brain. The gut-brain axis is one of the most rapidly advancing areas in mental health science. Researchers describe it as a bidirectional communication network linking the gastrointestinal tract and the central nervous system through the vagus nerve, neurotransmitters, immune signals, and microbial metabolites. In plain language: Your gut and your brain are in constant conversation. The health of one shapes the health of the other. The gut microbiome, the ecosystem of bacteria living in your digestive system, turns out to be one of the most powerful influencers of mood, cognition, anxiety, and depression we have ever identified.

Nutrition in Adolescence

The implications for young people are especially significant. Research in Translational Psychiatry found that adolescence is a critical window when the gut-brain axis is actively being fine-tuned, meaning that dietary interventions during this period may produce long-lasting consequences for mental health, for better or worse. What a young person eats during adolescence is not just shaping their body. It is shaping their brain, their emotional regulation, and their resilience. Studies consistently show that gut microbiome disruption is associated with greater depression and anxiety symptoms in children and adolescents. And diets high in prebiotic fiber, the kind found in dandelion greens, collards, and the full range of foods that stocked Black Southern kitchens, are directly linked to improved mental health outcomes.

Our ancestors were doing precision mental health intervention. They just called it supper. The philosophy of food as medicine has deep roots in Black culture, stretching from West African food traditions through the survival kitchens of enslaved people to the Sunday dinner tables of the South. Enslaved Africans carried botanical knowledge with them across the Middle Passage—knowledge of roots, leaves, and herbs that sustained bodies and spirits through unimaginable conditions. Dark leafy greens, including collards, mustard greens, and dandelion, were used not just as sustenance but as tools of detoxification, immune support, and healing. The pot likker left behind after a slow cook of greens, that deeply concentrated, vitamin-rich broth that Black Southern grandmothers swore by, was medicine passed down in a pot.

Modernity's Price on Mental Health

Somewhere along the way, we began to see these traditions as old-fashioned, as poverty food, as things to leave behind on the way to modernity. We traded the field greens for processed food. We traded the slow-cooked pot for the fast-food drive-through. And our children, inheriting disrupted microbiomes and an unsupportive food system, are paying the price in their mental health.

I’m not saying a bowl of greens can replace clinical care. I am not suggesting that dandelion tea cures depression or that a plate of collards replaces therapy. The youth mental health crisis demands systemic responses: more culturally affirming providers, better funding, greater access, and genuine investment in Black children’s well-being. But I am saying that we have underestimated how much damage we did when we walked away from the food traditions our elders built and how much healing is available to us if we walk back toward them. Nutritional psychiatry is now a recognized field. The research on diet and youth mental health is compelling and growing. Our elders were practicing it before it had a name.

Go pick some greens. The act of sending a child to the field is not just about the greens. It was about being in the earth, feeling the sun, bringing something back with your own hands that would feed the table. That act alone—the going outside, the bending down, the gathering, the returning—is the kind of embodied, nature-connected practice that research now tells us supports mental health in young people. Our elders were giving us prebiotic fiber, and they were giving us grounding. They were feeding our gut and feeding our sense of belonging to something larger than ourselves.