Not All “Plant-Based” Diets Support Brain Health (Here’s What Actually Matters)

If you’ve been trying to eat more “plant-based” for your health, you’re not alone. It’s one of the most common nutrition goals I hear from clients, and for good reason.

But here’s the part that often gets missed:

Not all plant-based diets are equally supportive of brain health.

A new large study adds an important layer of nuance to this conversation, and it challenges the idea that simply eating “plant-based” is enough.

The Study Everyone Is Talking About

Researchers followed nearly 93,000 adults over 11 years, looking at how different types of plant-based diets related to the risk of Alzheimer’s disease and other dementias.

At first glance, the message seems simple:

More plant-based eating = better brain health

But when you look closer, the real takeaway is much more useful—and more realistic.

👉 It’s not about whether your diet is plant-based. It’s about the quality of those plant foods.

I break down the full study (including its strengths and limitations) in my Psychology Today article here: Not All “Plant-Based” Diets Are Equal for Brain Health | Psychology Today