These Foods Actually Drop Insulin Levels and Shrink Belly Fat Cells

Thomas DeLauer references a study in Obesity: participants on a higher-protein eucaloric diet spontaneously ate less and had higher GLP-1 and PYY responses. He argues that the current evidence favors larger, less frequent protein boluses over grazing. He cautions that frequent eating leads to repeated insulin spikes and 'opens the floodgates' to overeating. By consolidating protein into one meal and allowing a long fast afterward, you harness the natural satiety hormones to control intake. For protein type, he recommends slow-digesting casein sources (cottage cheese, ground beef) for sustained effect, as opposed to whey which causes a hunger rebound.

DeLauer explains that whey protein is unique: it can kill your appetite strongly for about an hour, but then hunger returns 'with a vengeance.' He suggests using it when you're in a pinch and know you'll be in control of your food environment shortly. For longer-lasting satiety, he recommends casein protein sources like cottage cheese or ground beef, which digest slowly and provide an even suppression without the rebound.

Thomas DeLauer contrasts casein with whey: while whey gives a sharp but short appetite kill, casein's slow digestion provides a 'more drawn-out satiety.' He specifically mentions cottage cheese and ground beef as practical, whole-food sources that can keep hunger at bay for hours, especially when combined with fiber (psyllium) and omega-3s (salmon).

DeLauer calls psyllium 'ridiculously powerful' and 'probably one of the most potent stimulators next to protein.' He cites 19 RCTs showing psyllium's similarity to alpha-glucosidase inhibitors. He recommends tossing a tablespoon into a whey shake to both attenuate the insulin response and extend satiety. He notes that it mixes easily and can be drunk quickly, making it practical.

The speaker clarifies that GLP-1's primary role is glucose modulation, not only appetite suppression. By pairing shirataki with carbohydrates, you create a functional food combination that mimics the action of acarbose and enhances endogenous incretin production. He suggests this is a clever way to enjoy carbs while maintaining metabolic control.

Thomas DeLauer notes the anecdotal observation that people often feel satiated after salmon. He attributes this to the EPA content that temporarily fixes the leptin resistance seen in many individuals. By combining salmon with psyllium husk and cottage cheese, he claims you can go four or five hours without wanting to eat. He also offers fish oil capsules as a portable, quick alternative, emphasizing the dose of 5-6 pills to achieve a rapid anti-inflammatory effect.

Referencing a journal study, DeLauer highlights sacha inchi's DPP-4 inhibition, a property shared by some shellfish. He frames this as a unique way to 'let GLP-1 last longer,' so that all the other strategies are more effective. Because sacha inchi also contributes fiber, it hits two of the key pathways—stimulating GLP-1 release and preventing its breakdown.

Thomas DeLauer cites a meta-analysis of 19 randomized controlled trials published in BMC Endocrine Disorders that explicitly states psyllium has similar effects as intestinal alpha-glucosidase inhibitors, leading to increased GLP-1. He emphasizes that the researchers stated this could be as strong as a pharmaceutical intervention, which reframes psyllium not just as a laxative but as a direct metabolic signaling agent. He clarifies that the goal is appetite suppression, not just digestive health, and that as long as one’s stomach tolerates it, psyllium is a cheap, quick addition to a shake that slows gastric emptying and promotes the release of gut incretins.

He advises mixing one tablespoon into a whey protein shake, which can be 'pounded' down. The combination of protein and fiber is exponentially powerful, creating a long satiety window. He also notes that the effect is so strong that people can easily go hours without hunger, making it a practical tool for those trying to eat less.

Thomas DeLauer explains that whey protein is unique because it rapidly enters the bloodstream, causing a brief but powerful appetite-killing effect that lasts about 45 minutes to an hour. The downside is that once that spike subsides, hunger returns 'with quite a vengeance.' He positions whey as a tactical tool: use it when you're in a pinch—like on the road—needing to kill hunger immediately but anticipating you'll be in control of food choices within an hour. In contrast, casein protein (from cottage cheese, ground beef) digests slowly, providing a longer, more even satiety curve. This nuance allows listeners to match protein types to their lifestyle situations.

Citing a study published in Obesity where subjects on eucaloric diets had higher protein intake, the speaker notes that even at the same total calories, the high-protein group spontaneously ate less and had higher GLP-1 and PYY responses. When analyzing meal frequency, evidence points toward larger protein boluses and longer gaps without food being more effective. He reasons that every time you eat, you risk insulin spikes and 'open the floodgates' to overeat. A larger protein load, especially from whole foods, sends a strong satiety signal to the brain via PYY and neuropeptide Y, reducing subsequent intake. This concept combines the protein leverage hypothesis with the incretin effect, giving a practical intermittent-fasting blueprint.

Thomas DeLauer explains that consuming salmon (or fish oil) provides EPA, which rapidly reduces inflammatory markers. Since inflammation is a key driver of leptin resistance, this reduction improves both insulin and leptin sensitivity. Consequently, even if leptin levels increase, the body can properly register the signal, leading to reduced appetite. He describes a temporary window of proper signaling where you 'probably have proper signaling for a little while, meaning you're not that hungry.' He also notes that the protein in salmon amplifies the effect, and the combination with psyllium and casein can easily suppress hunger for four to five hours.

Referencing a study from the Journal of the Science of Food and Agriculture, the speaker states that sacha inchi is a strong DPP-4 inhibitor. DPP-4 is the enzyme that rapidly degrades GLP-1 once it's released. By inhibiting DPP-4, sacha inchi seeds allow the GLP-1 that is naturally produced (or boosted by other foods) to remain active longer, enhancing satiety and glucose control. Additionally, sacha inchi is high in soluble fiber, so it simultaneously provides the substrate for GLP-1 release and inhibits its breakdown—a dual-action mechanism. He mentions that similar DPP-4 inhibition is found in mussels and other shellfish, offering alternative foods for those who don't enjoy sacha inchi.

Thomas DeLauer explains that glucomannan from shirataki noodles swells and draws water, forming a viscous matrix that slows the breakdown and absorption of co-ingested carbohydrates. This delay allows more undigested carbohydrate particles to reach the ileum, triggering a stronger GLP-1 release. He clarifies that GLP-1's primary evolutionary role isn't just appetite suppression but glucose modulation; by smoothing out the post-meal glucose spike, GLP-1 indirectly reduces hunger. Therefore, the best way to use shirataki noodles is not in isolation but paired with a carbohydrate-containing meal, which creates a lower, sustained glucose curve and prolonged satiety.