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Blood Sugar Control -- blood test and blood sugar chart


Many different supplements and foods may help lower or control blood sugar in people with prediabetes or type 2 diabetes who experience hyperglycemia (when blood glucose rises higher than normal).

There are also supplements and foods that may worsen blood sugar control.

Sign in for the full answer, covering alpha-lipoic acid, amla, apple cider vinegar, berberine, black seed oil, chromium, cinnamon, CLA, collagen, CoQ10, curcumin, D-ribose, digestive enzymes, fenugreek, ginseng, Gymnema sylvestre, krill oil, magnesium, milk thistle, prebiotics, reishi and oyster mushrooms, spirulina, vitamin C, vitamin D, whey protein, and white mulberry, as well as coffee, extra virgin olive oil, fiber, whole fruits (including apples, bananas, and citrus), and peanuts. 

Due to the seriousness of hyperglycemia, it is important to consult with your physician regarding use of the approaches described in this article.

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October 3, 2021

I was borderline pre-diabetic with an average A1c of 5.7. I began taking metformin (850 mg. twice daily) and reduced my A1c to 5.6. Wanting to explore berberine, in part for some of its other properties, I switched to 800 mg. berberine twice daily about 90 days before my next blood test. My A1c dropped to 5.5 and stayed there or better switching.

September 15, 2021

eating 3 apples per day ? 1/2 of an apple raised my glucose by 30 pts and a banana forget it. i find this info bizarre.

September 19, 2021

I agree Judith. I have the same issue with apples and bananas

August 22, 2021

I am on a quest to reverse prediabetes (morning readings in the low 100s) so looking for potential helps for impact. I recently purchased a juicer, focusing on consuming deep green beverages. Specifically I've read impressive info on spirulina and request any information regarding the benefit of greens.
September 10, 2021

Please see the "What They Do" section of the Greens and Whole Food Powders and Capsules Review for information about spirulina and blood sugar control

August 22, 2021

Awesome update on the fruit studies. Much appreciated!

May 12, 2021

Have to spend a fortune to take all these !

November 10, 2020

What about red yeast rice? There have one red yeast rice called Ankascin 568-R, already had FDA NDI and also had a blood sugar clinical study.

August 13, 2020

What about Amla?
August 18, 2020

Hi Deborah - We've now added information about amla to the answer above.

November 11, 2019

My Glucose was in the low 120"s and my A1c was 6+ After taking Berberine 3x a day for 4 months my Glucose is 89 and a1c is 5.4. It has stayed that way even though I was prediabetic for over 5 years.

February 17, 2020

Could you share the brand of berberine that you used please, John?

October 6, 2021

What brand did you use and the amount that you used and what was the frequency

October 10, 2021

Please tell us the brand

November 26, 2017

My blood sugar is in the pre-diabetic range. D-ribose raises my blood sugar quite a bit. Test and see what it does for you before committing to taking it. Start testing your blood sugar 1/2 hour after taking the D-ribose and every 1/2 hour for about 2 hours to fully test the effects. If you take it in a liquid on an empty stomach, it can get into your bloodstream pretty fast.

February 9, 2017

I started taking Prickly Pear supplements and eating the chopped pear paddles from the mexican supermarket and my H1c dropped from 6.1 to 5.8 in 3 months. It seemed to be more effective than the Cinsulin that I had previously taken. I triy to do some exercise each day which I believe also helps.
February 9, 2017

Hi Pam - Thank you for sharing your experience with both of these supplements. There is some preliminary evidence for prickly pear, although there do no appear to be double-blind, placebo-controlled trials.

You can also get more information about CinSulin and other cinnamon formulas, and our test of products, in our Cinnamon Supplements Review:

kevin 11575
January 8, 2017

For a good view how the body works with fat, insulin, cortisol,... etc. read the book of Mike Mutzel 'Belly Fat Effect'. You get very good understanding trough science how it al works together.

April 2, 2016

April 17, 2016

Hi Yuval - We've now added information about Gymnema sylvestre to the answer above.

March 30, 2016

I am surprised you did not mention Fenugreek as lowering blood sugar in diabetics. My Doctor has me taking it and it has helped to keep my HbAic in a good control range.
March 31, 2016

Hi Joann- Thank you for sharing your experience taking fenugreek. We've now added information about this to the answer above.

March 30, 2016

I notice that white mulberry leaf extract is one of the principal ingredients in Dr. Joel Fuhrman's proprietary blend of his Glucose Biotect. Is there a report or studies on white mulberry? This product is quite effective.
April 18, 2016

Thank you for your question, Judith. We've now added information about white mulberry to the answer above.

March 30, 2016

I have used organic psyllium husk fiber (2 tbsp 30 minutes before meals) extensively with my family practice patients (and myself) with excellent results. I use Now brand because it does not have sugar or artificial sweeteners like Metamucil - and it is much cheaper. I have no financial ties to Now Foods -

One of many research articles on Pubmed:

Nutr Rev. 2009 Apr;67(4):188-205. doi: 10.1111/j.1753-4887.2009.00189.x.
Health benefits of dietary fiber.
Anderson JW1, Baird P, Davis RH Jr, Ferreri S, Knudtson M, Koraym A, Waters V, Williams CL.
Dietary fiber intake provides many health benefits. However, average fiber intakes for US children and adults are less than half of the recommended levels. Individuals with high intakes of dietary fiber appear to be at significantly lower risk for developing coronary heart disease, stroke, hypertension, diabetes, obesity, and certain gastrointestinal diseases. Increasing fiber intake lowers blood pressure and serum cholesterol levels. Increased intake of soluble fiber improves glycemia and insulin sensitivity in non-diabetic and diabetic individuals. Fiber supplementation in obese individuals significantly enhances weight loss. Increased fiber intake benefits a number of gastrointestinal disorders including the following: gastroesophageal reflux disease, duodenal ulcer, diverticulitis, constipation, and hemorrhoids. Prebiotic fibers appear to enhance immune function. Dietary fiber intake provides similar benefits for children as for adults. The recommended dietary fiber intakes for children and adults are 14 g/1000 kcal. More effective communication and consumer education is required to enhance fiber consumption from foods or supplements.
March 31, 2016

Hi Arthur - Thank you for sharing your experience taking fiber. We've added information to the answer above, including a link to our webinar about fiber supplements ( which may be of interest to you.

Diane 11403
November 16, 2016

Hi Arthur, My husband is prediabetic and does take Metamucil so I'm interested in your Now product. I looked online and found they have a couple but can't tell the difference, one says psyllium husk powder and the other whole psyllium husks, which do you use?


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