Dr. Greg Potter has a PhD from the University of Leeds in sleep, nutrition, and metabolism.

Check out Bon Charge wellness products (Code SIIM for 15% discount): https://boncharge.com/siimland

Timestamps:

00:00 Intro

00:45 Catchup

02:05 Are circadian rhythms nature or nurture

09:55 What’s ideal timing of sunlight exposure for circadian anchoring

15:25 Bon Charge sponsorship

20:30 Does creatine increase DHEA or DHT levels

25:50 Does creatine reduce sleep quality

33:25 Greg’s new podcast

36:15 Is more REM sleep better

42:05 How to optimize REM sleep

44:25 What % of different sleep cycles should we get (light, deep, REM)

46:10 Is food processing good or bad

52:45 Incline bed therapy

55:20 Is it bad to use sleep herbs

58:45 Does melatonin supplementation stop natural production

01:01:15 What to do if you wake up at night and can’t fall back asleep

Greg Potter YouTube Channel: https://www.youtube.com/@gregpotterphd

Dr. Andrew Hill has a PhD in Cognitive Neuroscience from UCLA and has extensive experience in the field of neurofeedback and QEEG. He founded the Peak Brain Institute.

Check out Bon Charge wellness products (Code SIIM for 15% discount): https://boncharge.com/siimland

Timestamps:

00:00 Intro

00:45 — Andrew's new book Gifted and Tortured

04:47 — Diagnosis vs resource-based brain optimization

06:20 — The 12 core brain phenotypes

07:57 — The stabilizer and supervisor: executive and sleep control

10:23 — CEO and lifeguard phenotypes: hyperfocus, anxiety, and stuck thoughts

12:41 — Language and auditory processing phenotypes

14:53 — Bon Charge sponsorship

16:00 — Phenotypes exist on a spectrum

17:03 — Brain speed, memory, aging, and sleep-related brain fog

20:15 — Interventions: sleep, meditation, supplements, and neurofeedback

21:46 — The most common phenotypes Andrew sees

26:30 — Supplements, stimulants, and nootropics

29:24 — Why Andrew prefers training the brain over relying on meds

32:26 — How accurate is self-diagnosis?

35:12 — Sleep trackers, self-awareness, and measuring how you feel

36:11 — Peak performance and flow states

41:19 — Using phenotype to train smarter and recover better

42:34 — Siim’s brain scan begins

44:40 — What the brain map shows: fatigue, hyperfocus, and executive traits

48:57 — Siim’s speed and focus test results

53:20 — Andrew’s own brain phenotype and ADHD story

58:20 — Can focus be trained?

01:03:18 — Main takeaway: understanding your brain creates agency

Dr. Andrew Hill YouTube channel: https://www.youtube.com/@DrHillMy 2026 longevity routine: https://youtu.be/OceysodInIo

Start rewinding your biological clock: https://www.siimland.co/course

P.S. This is not professional medical advice and should not be taken as such. The creator of this video is not held accountable for your health. Consult your doctor first.

Professor Kristen Hawkes is a pioneering anthropologist whose work helped bring the grandmother hypothesis to the spotlight of human evolution research. Through fieldwork and evolutionary theory, she argued that older women may have played a crucial role in shaping the human life course, not just by living longer, but by helping feed and support grandchildren. That idea helped reframe menopause, longevity, and family cooperation as possible drivers of what makes humans distinct and what explains our longer lifespans.

Check out Bon Charge wellness products (Code SIIM for 15% discount): https://boncharge.com/siimland

Timestamps:

00:00 Intro

01:05 How Kristen started to think about the paradox of grandmother longevity

09:15 What accounts for variation in adult mortality across lifespan

13:40 Difference in male and female longevity

17:20 Why human babies are very dependent

20:05 Bon Charge sponsorship

21:10 Dynamics of human social evolution and longevity

23:05 How longer weening period in human babies contributes to our intelligence

29:35 Weening and intelligence

34:25 Evolutionary explanation for grandparents

36:35 The contribtion of hunting success vs gathering to children size in Hadza

47:05 Does the grandmother hypothesis make sense

48:15 Role of DHA and seafood in human brain evolution

51:35 Social hierarchy of grandparents in the Hadza

56:01 Grandfathers

01:08:35 Role of grandparents in the modern world

My 2026 longevity routine: https://youtu.be/OceysodInIo

Start rewinding your biological clock: https://www.siimland.co/course