Summary
Siim Land answers listener questions on skin health (anti-inflammatory diet, avoiding rancid oils, and collagen preservation), the real nutritional differences between grass-fed and grain-fed meat (fat quality matters more than the lean portion), and practical intermittent fasting strategies. He also touches on how macro ratios should guide your choice of leaner versus fattier cuts of meat.
Key Points
- Skin health improves most from reducing inflammatory seed oils and increasing collagen-rich foods like bone broth.
- The omega-3 to omega-6 ratio in grass-fed beef fat is significantly better than grain-fed, but the lean portions are nearly identical.
- If you eat lean cuts, grass-fed vs. grain-fed matters less since the fat composition difference is in the fat fraction.
- Intermittent fasting supports skin health by promoting autophagy, which clears damaged proteins and cellular debris.
- Avoid rancid cooking oils (canola, soybean, corn) that generate oxidative stress and accelerate skin aging.
- Collagen supplementation (5-15g daily) or regular bone broth consumption provides the glycine and proline your skin needs for repair.
Key Moments
You can build muscle fasting up to 4 hours post-workout but beyond that it gets hard
Siim Land explains that training on an empty stomach is fine for muscle building as long as you eat within about four hours after the workout. Beyond that window, building muscle and strength becomes significantly harder, though fat loss still works.
"anything from like four hours is still anything below four hours is still safe in terms of muscle and exercise at like adaptations, so you still can build muscle and you can still get stronger and progressive that gym if you fast less than four hours after the workout, but if you start to fast longer than four hours, then it's gonna be quite hard to keep up with it."
Sleep quality decreases during extended fasting but so does your sleep demand
Siim explains that while extended fasting can make it harder to fall asleep, your overall sleep demand also decreases because you are not eating, not exercising as hard, and ketosis provides neuroprotective benefits. He recommends warm liquids, magnesium, and building sleep drive through daytime movement.
"your sleep demand generally goes down if you are fasting because you're not really eating, you're not probably exercising that much, you're not causing your body that much damage, and you're also in ketosis that has these neuroprotective effects and brain benefits"
Combining fasting with senolytics and AMPK activators amplifies longevity pathways
Siim discusses the strategy of combining extended fasting with flavonoid supplements like fisetin and quercetin plus AMPK activators to synergistically boost autophagy and senolytic effects, accelerating the longevity benefits of fasting.
"if you're like fasting for the sake of this longevity pathways, and clearing out some acid cells, and pushing more autology, then yeah, it does make sense to combine those things to a certain extent"
A 10-15 minute walk after meals is the best non-supplement intervention for blood sugar spikes
Siim recommends a simple 10-15 minute walk as the most effective non-supplemental way to cut post-meal blood sugar spikes, followed by chromium supplementation for insulin sensitivity and berberine as a safer alternative to metformin.
"the best non-supplemental way to do that is to just go for a walk, so just a 10-minute, 15-minute walk is going to be amazing for cutting down the post-brandial blood sugar response quite fast"
