Where gut hormones fit in
When food hits the small intestine, the gut releases hormones that tell the brain "I'm full" and tell the stomach "slow down." Two of them matter most here.
GLP-1, short for glucagon-like peptide-1, reduces appetite and smooths blood sugar. CCK, or cholecystokinin, also slows the stomach and curbs eating.
The entire GLP-1 drug class, which includes popular medications, basically copies one of these hormones. But your gut already makes them. The question is how to trigger them naturally.
The two ingredients in this study
The researchers zeroed in on two nutrients. Lauric acid, a medium-chain fatty acid found in coconut and palm kernel oil. And L-tryptophan, an amino acid found in many protein foods.
Earlier work in healthy men showed something strange. Given alone at low doses, neither did much. Paired at the same low doses, they triggered a solid hormone response.
This new study asked whether the same pairing could help men with type 2 diabetes.
Why the tube matters
This is the crucial technical detail. The nutrients were infused directly into the upper small intestine (intraduodenal, meaning infused directly into the upper small intestine) through a thin tube.
That is not how most people eat. The tube skips the mouth, throat, and stomach and delivers the nutrients right to where gut hormones are made.
So this study is a mechanism test, not a real-world eating trial. It asks "can these nutrients do the job?" not "should you eat coconut oil and turkey together?"
The setup in plain terms
Eleven men with type 2 diabetes, average age 69, came in on four separate visits. Each visit, they got one of four tube infusions for 45 minutes.
Option one was lauric acid alone. Option two was tryptophan alone. Option three was the combination. Option four was saline, a salt-water placebo.
Thirty minutes after the infusion ended, each person drank a mixed-nutrient drink roughly equivalent to a moderate meal. Blood sugar, hormones, and stomach emptying were tracked for the next three hours.
The results lined up with the earlier healthy-volunteer work. Neither nutrient alone moved the needle much. The combination did.
Peak blood glucose after the meal dropped from 11.1 to 9.8 mmol per liter. That is about a 12% reduction at the worst point of the spike. Overall glucose exposure was also lower.
Stomach emptying slowed meaningfully. GLP-1, GIP, and CCK all rose before the meal drink even arrived. Interestingly, insulin and C-peptide did not change significantly during the post-meal window.
The blood sugar benefit appears to come mainly from the stomach hitting the brakes, not from more insulin.
The drip-before-meal analogy
Think of your stomach as a sink draining into a bowl. Your blood sugar is how fast the bowl fills.
A normal meal dumps a bucket of water into the sink. It drains fast, and the bowl overflows.
The nutrient combination is like partially closing the sink's stopper before you pour. The water still goes in, but the bowl fills more slowly. Your body gets more time to handle each bit of glucose.
What was missing from the results
The authors were honest about what did not happen. Even though GLP-1 and CCK rose before the meal, no extra treatment effects appeared postprandially. That means the hormonal boost mostly faded once the drink was on board.
Insulin did not spike higher on the combination arm. That is fine in practice, but it tells us the mechanism is not "more insulin." It is almost entirely "slower delivery."
Real limits on real-world use
Here is where excitement should cool off.
Only 11 men participated. No women were included. Results in women may differ because sex hormones affect gut function and metabolism.
Average age was 69. Findings may not apply cleanly to younger adults with type 2 diabetes.
And again, the tube. Eating lauric acid and tryptophan in food form would involve digestion, mixing with other nutrients, and different timing. The effect could be weaker or different.
What this opens up
The study is a steppingstone. It suggests that simple, food-derived nutrients can nudge the same pathways that expensive medications target.
If future work figures out a practical oral delivery, perhaps a supplement or a carefully designed pre-meal drink, the idea could reach patients. But that work has not been done yet.
Anyone with diabetes should not jump to self-dosing coconut oil and tryptophan supplements. The specific doses, timing, and delivery all matter. Getting them wrong could cause digestive issues without any metabolic benefit.
What to tell your doctor
If you are interested in nutrient-based strategies for blood sugar, your care team probably already has practical suggestions. Fiber before meals, protein ahead of carbs, and vinegar-based drinks have stronger real-world evidence so far.
This study's value is showing that the underlying biology supports those ideas. Slowing the stomach and engaging gut hormones are real levers.
Next steps will likely include tests in women, larger trials, and creative delivery methods. Researchers will also want to see whether the effect holds up across different meal types and in longer studies measuring real glucose control over weeks.
For now, this is a mechanism paper with useful clues. The gut has its own brakes. Scientists are learning how to press them more gently and more often.