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Kris Gethin14 March 2025

Episode 432: Kris Gethin: The Natural Blueprint for Building Muscle After 40

2Frameworks
5Insights

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Frameworks in this episode

Peak Performance5 steps

The After-40 Training Adjustment

Trade workout volume for recovery, quality, and heavy compound work

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Self-Mastery5 steps

The Muscle-Preserving GLP-1 Guardrail

Pair appetite suppression with protein and resistance training

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Insights & moments

The myth-busts, hot takes, explainers, and tools worth keeping.

Explainer· 1

Explainer02:30

The Hidden Exposures Gethin Audits Before Testosterone Therapy

Gethin says he looks at air, water, household products, sleep, dietary fat, and sunlight before treating low testosterone as a hormone-replacement problem. His central point is that adding TRT without investigating modifiable causes can become a band-aid, although several exposure claims in this discussion are presented without supporting evidence.

  • Audit the person's environment before assuming hormones are the root problem
  • Review sleep and dietary fat alongside environmental exposures
  • Consider sunlight and relevant nutrient status
  • Treat the exposure claims as hypotheses requiring professional evaluation

“So I always look at people's air, water, and their environment”

Kris Gethin · 03:00

“they go on TRT but they haven't fixed the root cause. Now they're just putting a band-aid on it.”

Kris Gethin · 03:30
#testosterone#environment#sleep#root causes

Story· 1

Story07:00

The Dental Intervention Gethin Links to Better Blood Markers

After long COVID, Gethin says his testosterone levels dropped and were difficult to restore. He recounts replacing two metal dental implants with ceramic ones and removing a gold tooth, after which he says his testosterone rose and liver enzymes fell; he openly characterizes the connection as potentially sounding “woo woo” and defers the mechanism to a dental expert.

  • His testosterone decline followed long COVID
  • A dentist replaced metal implants with ceramic implants
  • Gethin reports improved testosterone and liver-enzyme readings afterward
  • The episode does not establish that the dental work caused those changes

“The one thing that I noticed when I got long COVID uh my testosterone levels really really dropped and I had difficulty getting them back…”

Kris Gethin · 07:00

“It may sound very woo woo. My testosterone went up and my liver enzymes came right down like almost immediately.”

Kris Gethin · 08:00
#dental health#testosterone#liver enzymes#personal story

Tool· 2

Tool05:30

How Gethin Chooses Red-Light Tools for Different Targets

Gethin describes using different red-light formats for brain, gut, joint, travel, and whole-body routines. The practical distinction is form factor: a head band, abdominal pad, portable joint device, or home panel is chosen according to the area and context he wants to target.

  • Use a head-worn device for his brain-focused routine
  • Use a larger pad for his gut-focused routine
  • Carry a smaller unit for joints and travel
  • Use home panels for broad exposure

“One is like a band that goes around the head and that's focused specifically on brain health. And then you have another one that's like…”

Kris Gethin · 06:00

“I have the panels at home that I'll get under naked”

Kris Gethin · 06:30
#red light#recovery tools#travel#biohacking
Tool10:30

Why Gethin Uses Dihydroberberine Before Carb-Heavy Meals

Gethin describes dihydroberberine as an ingredient in a glucose-disposal product he uses to support blood-sugar stability. He says these ingredients are commonly taken before a carb-heavy meal, contrasting his own choice with people in biohacking circles who use metformin.

  • Dihydroberberine is included in the GDA product he uses
  • The intended use is blood-sugar stabilization
  • He places the timing before a carb-heavy meal
  • The discussion is personal practice, not individualized medical advice

“Dihydroberourine is one of those ingredients in there.”

Kris Gethin · 10:30

“there's just a lot of blood sugar stabilizing ingredients out there that you can take particularly before a carb heavy meal”

Kris Gethin · 10:30
#dihydroberberine#blood sugar#supplements#carbohydrates

Takeaway· 1

Takeaway16:00

The Natural Appetite Supports Gethin Names Beyond GLP-1 Drugs

Asked for natural ways to reproduce some appetite effects associated with GLP-1 drugs, Gethin names accemensia, colostrum-derived immunoglobulins, supplemental fiber such as psyllium husk, and a blood-sugar stabilizer. He emphasizes combining approaches, with fiber chosen for its ability to bind and expand.

  • Accemensia is presented as a probiotic option for appetite support
  • Colostrum-derived immunoglobulins are another option he names
  • Supplemental fiber is considered in addition to vegetables
  • Psyllium husk is his example of a fiber that binds and expands
  • Blood-sugar stability may help address hunger after a crash

“And then uh fiber just making sure that you get lots of fiber in your diet. That is one thing that people usually ignore.”

Kris Gethin · 16:00

“something that's going to bind and expand. That could be like a psyllium husk, just as an example. But a combination of those things usually…”

Kris Gethin · 16:30
#appetite#fiber#psyllium husk#blood sugar#probiotics