The average age for onset of dementia in the U.S. is 84. Unfortunately, there are about 200,000 adults in their 40s, 50s, and early 60s who have early-onset dementia, which interrupts their work and family life in profound ways.

For the first time, researchers have identified a cluster of risk factors associated with developing dementia at a younger age. Using data on around 360,000 people, they discovered that people who experience low blood pressure when they stand up after sitting or lying down (called orthostatic or postural hypotension) have the highest risk.

Other measurable risk factors include depression, alcohol use disorder, stroke, diabetes, heart disease, vitamin D deficiency, impaired hearing, social isolation, and elevated inflammatory CRP levels.

Carrying two APOE4 alleles — a genetic predisposition — is also a risk.

The good news is that even if you have a genetic predisposition, there are 40 lifestyle choices identified in Dr. Mike's book, "The Great Age Reboot " that can counter your risks. Some are:

• Engage with friends and express your gratitude and generosity daily.

• Wear hearing aids, if needed.

• Smell four different smells intentionally each day.

• Have extra-virgin olive oil and black coffee daily.

• Boost vitamin D levels by enjoying salmon and/or and taking a supplement of 1,000 IU daily. Then get a blood test to see if you need more. Ditch red and processed meats, added sugars, and highly processed foods.

• Engage in the four components of physical activity — endurance, strength, balance, and flexibility — weekly.

• Do speed-of-processing games and never stop learning.