Add This Before Dinner If Your Blood Sugar Runs High
By Dave Prouhet, Studio Strong, O’Fallon, IL
Updated November 2026
Take psyllium husk, the fiber powder in Metamucil and the cheaper store brands. Mix it into a full glass of water and drink it right before you eat. A 2015 review of 35 trials found that people being treated for type 2 diabetes who did this for several weeks lowered their fasting blood sugar by 37 mg/dL and their A1C by almost a full point. People with normal blood sugar saw no real change.
Late one night in October, I came across a video called “This 99 Cent Food Mimics Ozempic” by Dr. Bazgha Khalid, an internal medicine and obesity medicine doctor. I ran it through ReelCall.app, the app I built that turns a YouTube video into text you can read and ask questions of.
The food she’s talking about is a can of beans. Her explanation: the fiber slows digestion, gut bacteria ferment the beans’ resistant starch into short-chain fatty acids, and those acids tell your gut to release GLP-1, the hormone Ozempic copies. She even says, “I’m not saying beans are Ozempic,” though you wouldn’t know it from the thumbnail.
The fiber-to-GLP-1 chain is real (a 2015 study in Gut backs it up), but it’s a nudge. The gel effect has stronger evidence, and psyllium husk has decades of trials behind it. Thomas DeLauer, in another video in my ReelCall library, calls it “great” with “a strong track record.”
Why think about blood sugar before Thanksgiving?
November is National Diabetes Month. The CDC counts 40.1 million Americans with diabetes, and 11 million don’t even know it. Another 115.2 million adults have prediabetes.
Most of us eat like fiber is a rumor. The average U.S. adult gets about 16 grams a day, per USDA. The 2020-2025 Dietary Guidelines say women over 50 should aim for 22 grams and men for 28, and over 90% of women and 97% of men fall short. The American Diabetes Association tells people with or at risk for diabetes to get at least 14 grams per 1,000 calories.
Does psyllium lower blood sugar?
If your blood sugar runs high, yes. In that 2015 review, the effect tracked where people started: nothing significant with normal blood sugar, a modest drop in prediabetes, and the biggest drop in people being treated for type 2 diabetes. The study was led by scientists at Procter & Gamble, which makes Metamucil.
An independent 2024 review of 19 trials with 962 people, some healthy and many with diabetes, found psyllium lowered fasting blood sugar by about 7 mg/dL and A1C by 0.75. The evidence was rated moderate, and A1C improved only at 10 grams a day or more.
Preventing diabetes is another story. The FDA’s approved claim: “Psyllium husk may reduce the risk of type 2 diabetes, although the FDA has concluded that there is very little scientific evidence for this claim.” Rarely has a health claim undersold itself so hard.
Late one nightHow does fiber slow blood sugar?
Psyllium thickens what’s in your small intestine into a gel, which slows digestive enzymes and sugar absorption. In 18 adults with type 2 diabetes, psyllium taken right before dinner cut the after-dinner blood sugar peak by 20% compared with a placebo.
Psyllium mostly isn’t fermented, so it doesn’t trigger the gut-bacteria-to-GLP-1 pathway the way beans do. In a small Finnish study of healthy young adults, psyllium-loaded meals blunted the rise in blood sugar and insulin, and psyllium plus protein actually flattened GLP-1. Psyllium isn’t “nature’s Ozempic,” and it isn’t a replacement for medication.
How much psyllium should I take before meals?
A typical powder dose is one rounded teaspoon, about 3.4 grams of psyllium husk, in at least 8 ounces of water, up to three times a day. Three doses make 10.2 grams, the daily amount in several trials. Start with one dose a day, as the labels advise, because gas and bloating can show up at first. Start now, and your gut (and coworkers) can adjust before Thanksgiving.
How: stir it into a full glass of water and drink it promptly, right before the meal. Wait too long and you’re drinking pudding.
What to buy: check three things on the label. The ingredient should say psyllium husk; wheat dextrin and inulin powders don’t form the gel. Watch the sugar: some Metamucil versions contain real sugar, and one “unflavored” organic psyllium lists brown cane sugar. And mind the capsules: they hold only about half a gram each, so a label dose is five capsules, swallowed one at a time with a full glass of water.
When: on Thanksgiving, take your dose right before you sit down to eat. Don’t expect one glass to fix one meal. Fasting sugar didn’t improve in trials shorter than 50 days, so this is a habit, not a quick fix.
Bonus: the FDA also lets psyllium foods carry a heart-disease claim, based on 7 grams a day of psyllium’s soluble fiber as part of a diet low in saturated fat and cholesterol.
Who should not take psyllium?
Psyllium laxatives must carry this FDA warning: “Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking. Do not take this product if you have difficulty in swallowing.” Chest pain, vomiting, or trouble swallowing or breathing after a dose? Get medical help right away.
Skip it, or ask your doctor first, with any of these:
- A narrowed esophagus, for the same reason.
- Bowel blockage, narrowing or impaction, now or in the past.
- Diabetes medication. Psyllium can add to its effect, so blood sugar may drop too low, and your dose may need adjusting.
- Other medicines. Fiber can change how some drugs are absorbed. Take psyllium at least 2 hours before or after them (3 hours for digoxin, aspirin and nitrofurantoin).
- A psyllium allergy. Some people react just from breathing the powder in.
Check with your doctor before making psyllium a daily habit. MedlinePlus advises against taking it for more than a week unless your doctor says so, so if you plan to use it long-term, that’s the conversation to have.
This month we’re thankful for everyone who keeps choosing their health. Sometimes that’s a heavy lift. Sometimes it’s just a glass of cloudy water before dinner.
FAQ
Can psyllium replace my diabetes medication or a GLP-1 drug? No. Psyllium slows digestion, and the trials tested it on top of diet and medication, not instead of them. If you take diabetes medication, talk to your doctor before you start, because the combination can push your blood sugar too low.
Will psyllium help if my blood sugar is normal? Not much. The 2015 review found no significant drop in people with normal blood sugar and a modest one in prediabetes. A recent A1C or fasting glucose test tells you which group you’re in.
Can I just eat more beans instead? Yes, and food comes first. A cup of boiled black beans has 15 grams of fiber, close to what the average American eats in a whole day. Beans also feed the gut bacteria that make short-chain fatty acids, which psyllium mostly doesn’t. Psyllium helps when food alone isn’t closing the gap.
When should I take psyllium, before or after a meal? Right before or with it. In the type 2 diabetes study, the doses came immediately before breakfast and dinner. In people with normal blood sugar, psyllium in water before a meal didn’t lower the spike; it only worked when mixed into the food itself. Either way, drink a full glass of water with it.
Sources
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). National Diabetes Month.
- Centers for Disease Control and Prevention. National Diabetes Statistics Report (updated September 16, 2026): 40.1 million with diabetes, 11.0 million undiagnosed, 115.2 million adults with prediabetes.
- USDA Agricultural Research Service. What We Eat in America, NHANES August 2021 to August 2023, Table 1 (adults 20+: 16.3 g fiber a day).
- USDA and HHS. Dietary Guidelines for Americans, 2020-2025 (Chapter 4, “Dietary Fiber,” and Appendix 1, Table A1-2).
- American Diabetes Association Professional Practice Committee. Standards of Care in Diabetes 2026, Section 5. Diabetes Care. 2026;49(Suppl 1):S89-S131. Recommendation 5.24.
- Gibb RD, McRorie JW, Russell DA, Hasselblad V, D’Alessio DA. Psyllium fiber improves glycemic control proportional to loss of glycemic control. Am J Clin Nutr. 2015;102(6):1604-1614.
- Gholami Z, Clark CCT, Paknahad Z. The effect of psyllium on fasting blood sugar, HbA1c, HOMA IR, and insulin control. BMC Endocr Disord. 2024;24:82.
- Rivers CR, Kantor MA. Psyllium husk intake and risk of type 2 diabetes: a review of a qualified health claim by the US FDA. Nutr Rev. 2020;78(10):787-797.
- Chambers ES, et al. Effects of targeted delivery of propionate to the human colon on appetite regulation. Gut. 2015;64(11):1744-1754.
- Lambeau KV, McRorie JW Jr. Fiber supplements and clinically proven health benefits. J Am Assoc Nurse Pract. 2017;29(4):216-223.
- Pastors JG, et al. Psyllium fiber reduces rise in postprandial glucose and insulin concentrations in patients with non-insulin-dependent diabetes. Am J Clin Nutr. 1991;53(6):1431-1435.
- Karhunen LJ, et al. A psyllium fiber-enriched meal strongly attenuates postprandial gastrointestinal peptide release in healthy young adults. J Nutr. 2010;140(4):737-744.
- Wolever TM, et al. Effect of method of administration of psyllium on glycemic response and carbohydrate digestibility. J Am Coll Nutr. 1991;10(4):364-371.
- Drug Facts labels on DailyMed: Metamucil powder, Daily Fiber Sugar Free, NuSyllium Unflavored Organic, Target Fiber Laxative capsules.
- 21 CFR 201.319: required warnings for psyllium products (choking warning).
- 21 CFR 101.81: soluble fiber and heart disease claim.
- MedlinePlus. Psyllium (last revised June 20, 2024).
- RxList. Blond Psyllium (Natural Medicines monograph).
- Mayo Clinic. Chart of high-fiber foods (December 24, 2025).
Videos referenced (read as transcripts in ReelCall)
- Bazgha Khalid, MD. This 99 Cent Food Mimics Ozempic: Here’s How (And How to Use It)
- Thomas DeLauer. 3g Drops LDL, Skyrockets GLP-1 and Repairs Mitochondria
