The Daily Habits That Shape Your Brain Health | Louisa Nicola

She frames neurodegenerative diseases as being heavily driven by daily behaviors, highlighting poor sleep, inadequate exercise, diet, stress, and inflammation as key habit-domains to address over time.

She says dementia is an umbrella term with Alzheimer’s as a major subtype, and describes Alzheimer’s as involving amyloid beta and tau; she argues amyloid is not “the demon,” calling it an antimicrobial peptide involved in protection during stress/inflammation.

Louisa Nicola describes Alzheimer’s as a long-building process that may accumulate from early adulthood, and explains symptoms arise after a threshold of lost neural connections rather than an overnight change.

She recommends, at minimum, about three hours per week of aerobic “zone two” work (conversational but slightly breathy), plus about 20 minutes per week of very hard effort relative to the individual, and at least two days per week of resistance training (favoring compound movements).

She says aerobic training can increase gray matter by increasing synaptic connections, and connects aerobic exercise to BDNF (brain-derived neurotrophic factor), which she says crosses into the brain and supports the hippocampus—an early-affected region in Alzheimer’s.