Weekly Health Quiz: How Your Brain Cleans Itself and Why Younger People Are Aging Faster Now

1 Which statement about wasteosomes is not true?

• They are thin and cylindrical in shape
  

  Wasteosomes are spherical structures that act like sealed waste containers, collecting materials such as tau before they are cleared from the brain. Learn more.

• They can measure 2 to 50 micrometers across
• They are formed by support cells in the brain
• They can be released into cerebrospinal fluid

2 How many times per week should beginners use a vibration plate?

• Once a week
• Four to five times a week
• Every day, but for a few minutes only
• Two to three times a week
  

  Beginners are advised to start with two to three sessions weekly, using low intensity and allowing at least 24 hours between sessions. Learn more.

3 What is the minimum amount of carbohydrates the brain requires each day?

• 50 g
• 75 g
• 125 g
  

  The brain relies heavily on glucose for energy and requires a minimum of about 125 grams of carbohydrates per day to meet its energy needs. Learn more.

• 200 g

4 After a break, what approach may make a supplement routine easier to restart?

• Double the next scheduled dose
• Resume gradually without punishment
  

  A gentle restart avoids the burden of an all-or-nothing approach, making the routine easier to resume without added pressure. Learn more.

• Follow a stricter daily schedule
• Wait until motivation returns

5 Which of the following is a possible surgical complication of a C-section?

• Urinary tract infection
• Post-surgical infection
  

  C-sections carry surgical risks such as infection, pain, reactions to anesthesia, and accidental injury to nearby organs. Learn more.

• Hearing loss
• Kidney stones

6 Which therapy uses specific wavelengths of light to influence cellular activity without producing heat?

• Photodynamic therapy (PDT)
• Pulsed electromagnetic field therapy (PEMF)
• Photobiomodulation (PBM)
  

  Photobiomodulation (PBM) uses red or near-infrared light to interact with tissues and has been studied for recovery, pain, wound healing, and supportive cancer care. Learn more.

• Transcranial magnetic stimulation (TMS)

7 Faster immune system aging was linked to which early-onset cancer?

• Lung cancer
  

  In an exploratory analysis, faster immune system aging was associated with an 89% higher risk of early-onset lung cancer. Learn more.

• Breast cancer
• Kidney cancer
• Thyroid cancer

8 Which cells are responsible for breaking down bone tissue?

• Osteoblasts
• Chondrocytes
• Fibroblasts
• Osteoclasts
  

  Osteoclasts break down old bone as part of normal remodeling. Egg yolk peptides were found to reduce the number and activity of these bone-resorbing cells. Learn more.

9 What term refers to organ donation after a patient’s circulation has stopped?

• Living donor transplantation
• Donation after brain death (DBD)
• Donation after circulatory death (DCD)
  

  Donation after circulatory death (DCD) involves organ procurement after circulation has stopped and is different from donation after confirmed brain death. Learn more.

• Directed organ donation

10 How should opened dehydrated foods be stored?

• Uncovered at room temperature
• Sealed in a cool, dry, dark place
  

  Limiting moisture, heat, light, and air helps protect dehydrated foods from spoilage and quality loss. Learn more.

• Beside a warm kitchen appliance
• In an open container in sunlight

11 What do butyrate-producing gut bacteria feed on?

• Insoluble minerals
• Simple sugars
• Animal proteins
• Fermentable fibers
  

  Fermentable fibers feed beneficial gut bacteria that produce butyrate, a short-chain fatty acid that fuels colon cells and helps support the gut lining. Learn more.

12 What is the discomfort from conflicting beliefs called?

• Confirmation bias
• Cognitive dissonance
  

  Cognitive dissonance is the discomfort caused by conflicting beliefs or information, which can make people defend views they already hold. Learn more.

• Dunning-Kruger effect
• Observer bias

13 Which ingredient needs consistent daily use to build carnosine in the muscles?

• Beta-alanine
  

  Beta-alanine gradually raises muscle carnosine levels, which can help delay fatigue during demanding exercise. Learn more.

• Creatine
• L-citrulline
• L-carnitine

14 Which vitamin helps activate proteins that direct calcium into bone tissue?

• Vitamin A
• Vitamin K2
  

  Vitamin K2 activates proteins that help bind calcium to bone, reducing the chance that calcium builds up in soft tissues. Learn more.

• Vitamin C
• Vitamin B12

15 How could cross-linked psyllium help remove microplastics from the body?

• By breaking plastics down into smaller particles
• By dissolving plastics in the bloodstream
• By increasing plastic absorption through the gut
• By trapping plastic particles before they are absorbed
  

  Cross-linked psyllium can swell into a sticky gel that may trap microplastics in the gut, though this use has not yet been tested in humans. Learn more.

16 Which tea can add a substantial amount of flavanols to your daily diet?

• Green tea
  

  An 8-ounce cup of green tea provides an estimated 200 milligrams of flavanols, making it one of the richer beverage sources. Learn more.

• Chamomile tea
• Peppermint tea
• Ginger tea

17 What feature of ultraprocessed foods keep people hooked on it?

• Strong flavors that make foods seem more appealing
• Large portions that encourage people to eat more
• Soft, melt-in-your-mouth textures that interrupt fullness signals
  

  Soft ultraprocessed foods require less chewing, which may weaken satiety signals and make it easier to keep eating after the body has had enough. Learn more.

• Added sweeteners that make foods taste more rewarding

18 What gives astaxanthin an antioxidant advantage over beta-carotene and vitamin E?

• It remains concentrated mainly in watery parts of cells
• It accumulates primarily inside the body’s fat stores
• It becomes more active as oxidative stress increases
• It spans the cell membrane and anchors on both surfaces
  

  Astaxanthin’s membrane-spanning position lets it intercept oxidative damage where it begins, while high-dose vitamin E can become pro-oxidant under some conditions. Learn more.

19 Which molecule do sirtuins depend on to function?

• Nicotinamide adenine dinucleotide (NAD+)
  

  Nicotinamide adenine dinucleotide (NAD+) fuels sirtuin activity and links cellular energy status with repair, metabolism, and stress responses. Learn more.

• Adenosine triphosphate (ATP)
• Deoxyribonucleic acid (DNA)
• Coenzyme Q10 (CoQ10)

20 Which omega-6 fat is identified as a major driver of poor mitochondrial function?

• Alpha-linolenic acid (ALA)
• Linoleic acid (LA)
  

  Linoleic acid (LA) can interfere with mitochondrial energy production, which may help explain why lowering its intake can initially improve how some people feel. Learn more.

• Eicosapentaenoic acid (EPA)
• Docosahexaenoic acid (DHA)

21 What trace mineral, when poorly regulated, can raise norepinephrine and lower dopamine?

• Zinc
• Iron
• Copper
  

  Copper helps produce norepinephrine. When it builds up, the resulting high-norepinephrine, low-dopamine pattern may contribute to anxiety, depression, and attention problems. Learn more.

• Selenium