Blog

Molecular structure of Vitamin K2 MK-7

Vitamin K2 MK-7 Dosage: Where the Numbers on th...

Vitamin K2 MK-7 dosage pages give you a number. I explain where the trial doses came from and what researchers measured.

Vitamin K2 MK-7 Dosage: Where the Numbers on th...

Vitamin K2 MK-7 dosage pages give you a number. I explain where the trial doses came from and what researchers measured.

Dr Lewis Nutrition D3+K2 bottle, front label

Vitamins D3 and K2: Why They Are Taken Together...

Vitamin D3 and K2 are sold as a pair. I explain the mechanism behind that pairing and what the trials have actually measured.

Vitamins D3 and K2: Why They Are Taken Together...

Vitamin D3 and K2 are sold as a pair. I explain the mechanism behind that pairing and what the trials have actually measured.

John E. Lewis, Ph.D. discusses important questions about dietary supplements.

Before You Buy a Brain Supplement, Ask These 7 ...

John E. Lewis, Ph.D. answers 7 questions relevant to all dietary supplements.

Before You Buy a Brain Supplement, Ask These 7 ...

John E. Lewis, Ph.D. answers 7 questions relevant to all dietary supplements.

Plant-Based Diet and Brain Health: What I Have Learned Since 1999

Plant-Based Diet and Brain Health: What I Have ...

Plant-based diet and brain health, examined honestly. I cover what the meta-analyses found, the vitamin B12 risk, and how I have eaten since 1999.

Plant-Based Diet and Brain Health: What I Have ...

Plant-based diet and brain health, examined honestly. I cover what the meta-analyses found, the vitamin B12 risk, and how I have eaten since 1999.

Cortisol and Memory: When Stress Helps Recall, and When It Hurts

Cortisol and Memory: When Stress Helps Recall, ...

Cortisol and memory move in both directions, and the trials show it. What stress does to recall, and the habits with evidence behind them.

Cortisol and Memory: When Stress Helps Recall, ...

Cortisol and memory move in both directions, and the trials show it. What stress does to recall, and the habits with evidence behind them.

Brain Health for Men Over 50: What I Have Learned Training Drug-Free

Brain Health for Men Over 50: What I Have Learn...

Brain health for men over 50, from a researcher who trains drug-free. What the testosterone trials measured, and which numbers matter.

Brain Health for Men Over 50: What I Have Learn...

Brain health for men over 50, from a researcher who trains drug-free. What the testosterone trials measured, and which numbers matter.