1 How much of the heart disease link was explained by high blood pressure, cholesterol, diabetes, and obesity?

• About 5%
• About 18%
• About 75%
• About 36%

  Traditional risk factors accounted for only about 36% of the association, which led researchers to describe PMOS as a risk-enhancing factor for cardiovascular disease in its own right. Learn more.

2 What happened inside cells when arginine became scarce in the laboratory experiments?

• Protein building sped up at every step
• Cells stopped producing all proteins at once
• Immune signals on cells became more visible
• Protein building stalled where arginine was needed

  When arginine ran low, the cellular assembly lines stalled at points requiring arginine, which reduced MHC class I output and left fewer warning signals on the cell surface. Learn more.

3 What was discovered about inflammatory myeloid cells in healthy donors aged 60 to 87?

• A smaller share than in younger donors
• The same share seen in younger donors
• A larger share than in younger donors

  A larger portion of myeloid cells produced inflammatory cytokines in older donors than in donors aged 21 to 33, matching the pattern seen in aged mice. Learn more.

• None were present in older donors

4 How is butyrate, the compound produced by these beneficial gut bacteria, used in the body?

• Fuel for bone marrow cells
• A hormone that controls appetite
• Fuel for the cells lining the colon

  Butyrate is a short-chain fatty acid formed when certain bacteria break down food in the colon, and it serves as the preferred energy source for colon-lining cells, helping maintain a strong intestinal barrier. Learn more.

• A nutrient stored in the liver for muscle energy

5 What did the analysis of 47 trials find about exercise intensity and BDNF increases in older adults?

• Higher-intensity training always raised BDNF more
• Intensity only mattered for people over 80 years old
• Only high-intensity intervals raised BDNF
• Harder workouts did not mean a bigger boost

  Lower-intensity exercise initially showed a larger predicted BDNF increase, and the benefit dipped slightly and leveled off as intensity rose, so strenuous workouts weren't required. Learn more.

6 Why doesn't easy online access replace a proper diagnosis of low testosterone?

• Levels stay constant all day long
• Fatigue always means low testosterone
• One reading always confirms deficiency
• Levels fluctuate and symptoms vary widely

  Testosterone fluctuates throughout the day, and symptoms such as fatigue and low libido have many possible causes, so a careful evaluation uses repeated testing and a review of medical history rather than one reading and a checklist. Learn more.

7 What is the main advantage of CBCT scans described in this interview?

• They remove fillings without any pain
• They measure blood sugar through the gums
• They replace the need for any traditional dental exam
• They give detailed 3D images for diagnosis

  Cone beam computed tomography (CBCT) produces 3D images of the jaw, sinuses, and teeth that can be sliced in multiple planes, and a published review cited in the interview found it more effective than traditional radiography for detecting complex oral disorders. Learn more.