High blood sugar
Check what applies to you and the best-matched supplements move to the top.
Nothing checked yetDefault order, by strength of evidence.
Bottom line
For high blood sugar, start with Berberine, Bitter melon extract, Banaba leaf extract. The first one to look at is Berberine — 500–1,500 mg a day. Start with 1 capsule (500 mg).; After meals, split into 2–3 doses.
Supplements ranked for this concern
AWell researchedBSome evidenceCLimited evidence
| # | Supplement | Evidence | When | How much | Caution | |
|---|---|---|---|---|---|---|
| 1 | BerberineMatches your checks Helps insulin work better. It's the most widely used ingredient for lowering fasting blood sugar and A1C. |
A | After meals, split into 2–3 doses | 500–1,500 mg a day. Start with 1 capsule (500 mg). | If your stomach hurts, take less. Watch for low blood sugar if you combine it with other blood sugar ingredients. | Compare products |
| 2 | Bitter melon extractMatches your checks Its plant-based insulin-like compounds may help blunt blood sugar spikes after meals. |
B | Right after a meal, especially a carb-heavy one | 500–1,000 mg for light support, about 2,000 mg for a stronger approach | With diabetes medicine, watch for low blood sugar signs like dizziness or cold sweats. | Details |
| 3 | Banaba leaf extractMatches your checks Its corosolic acid may improve insulin sensitivity and curb blood sugar rises after meals. A gentle place to start. |
B | After meals, especially carb-heavy ones | 1 capsule, up to 2–3 (about 0.45–1.3 mg of corosolic acid a day) | Adding it suddenly while your diabetes medicine is being changed may cause low blood sugar. | Details |
| 4 | Alpha-lipoic acid (ALA)Matches your checks Helps keep blood sugar steady and is used for numbness and tingling in the hands and feet caused by high blood sugar. |
B | On an empty stomach 30 minutes to 1 hour before a meal, apart from other supplements | 100–200 mg for maintenance, 600 mg for a stronger approach | It can cause low blood sugar or low blood pressure. If you take diabetes medicine, start with a low dose. | Details |
| 5 | ChromiumMatches your checks A mineral that supports insulin signaling, used as extra help for insulin resistance. |
B | Sticking to the dose matters more than timing. Getting it from a multivitamin is fine. | 200–400 mcg a day. Don't go over 400 mcg. | Don't take high doses long term. If you have kidney disease, talk to your doctor. | Details |
| 6 | Vitamin DMatches your checks Low levels go with more insulin resistance. A long-term study found people with prediabetes who raised their blood levels enough had a much lower diabetes risk. |
B | Right after breakfast or lunch | Start at 4,000 IU for 3–6 months → maintain at 1,000–2,000 IU | Keep your total from all products, including a multivitamin, at 4,000 IU a day or less. | Compare products |
| 7 | MagnesiumMatches your checks A mineral that, with omega-3 and vitamin D, is part of the basic combo for managing insulin resistance. |
C | After meals (if you take 2+ capsules, split them) | 200–400 mg a day (elemental magnesium) | If you get diarrhea, take less. If you have kidney disease, talk to your doctor. | Compare products |
| 8 | Omega-3Matches your checks It doesn't lower blood sugar much directly, but it lowers triglycerides and inflammation, which supports insulin resistance care. |
C | Right after a meal | 1,000–2,000 mg of EPA+DHA a day | If you take a blood thinner, talk to your doctor. | Compare products |
Medications to watch out for
If you take any medication, talk to your doctor or pharmacist before starting.
Diabetes drugs and insulinBerberine · Bitter melon · Banaba · Alpha-lipoic acidBlood sugar may drop too low. Be especially careful right after your medicine is changed or increased, and talk to your doctor.
GLP-1 shots such as Wegovy and MounjaroBerberine · Bitter melon · Alpha-lipoic acid · ChromiumBlood sugar may drop further, raising the chance of low blood sugar and stomach upset. Talk to your doctor.
Immunosuppressants (cyclosporine, tacrolimus)BerberineIt may raise drug levels in your blood. Don't take them together.
Digoxin (Lanoxin) and amiodaroneBerberineWith these drugs, even small changes in blood levels can be dangerous. Talk to your doctor first.
Blood thinners and antiplatelet drugs such as warfarin (Coumadin)Berberine · Omega-3Bruising and bleeding may increase. Talk to your doctor.
Blood pressure medicineAlpha-lipoic acid · Magnesium · Omega-3Blood pressure may drop further and make you dizzy.
Before supplements: daily habits
- 01Even a 10-minute walk after a meal can keep your blood sugar from rising as much.
- 02Make breakfast protein-based instead of sweet. It cuts hunger, overeating and blood sugar spikes.
- 03Exercise that builds your thigh muscles gives your body more room to store and burn sugar.
- 04Add blood-sugar-lowering ingredients one at a time and watch for low blood sugar signs like dizziness or cold sweats.
- 05Cutting ultra-processed food, sugary drinks and alcohol comes before any supplement.
Product comparison
| Product | Form | Per serving | Count | Cost per day | |
|---|---|---|---|---|---|
| Berberine HCl 500 mg (60 Capsules)Best value Double Wood Supplements |
Regular (berberine HCl) | 500 mg | 60 | Low | Amazon → |
| Berberine 500 mg (100 VegCaps) Solaray |
Regular (berberine HCl) | 500 mg | 100 | Low | Amazon → |
| Premium Berberine+ Plus 1200 mg (120 Caps) Nutrivein |
Regular (berberine HCl) + a little cinnamon | 1200 mg | 120 | Low | Amazon → |
| Berberine HCl 1200mg with Ceylon Cinnamon (120 Capsules) NutriFlair |
Regular (berberine HCl) + a little cinnamon | 1200 mg | 120 | Low | Amazon → |
| Berberine HCl 1,200 mg (60 Capsules) Nutricost |
Regular (berberine HCl) | 1200 mg | 60 | Average | Amazon → |
| Berberine Glucose Support with MCT Oil (90 Softgels) NOW Foods |
Regular (berberine HCl), MCT oil softgel | 400 mg | 90 | Average | Amazon → |
| Berberine (Berbevis Phytosome + HCl, 60 Capsules) Thorne |
Blend (regular HCl + Berbevis phytosome) | Berberine HCl 450 mg + Berbevis phytosome 550 mg per serving (2 capsules) | 60 | High | Amazon → |
Compare all Berberine products →
| Product | Form | Per serving | Count | Cost per day | |
|---|---|---|---|---|---|
| Vitamin D3 1000 IU SoftgelsBest value Nature's Bounty |
D3 in soybean oil softgels | 1,000 IU per serving | 350 | Low | Amazon → |
| Vitamin D3 5000 IU Softgels Viva Naturals |
D3 in coconut oil softgels | 5,000 IU per serving | 360 | Low | Amazon → |
| Vitamin D-3 1,000 IU Softgels NOW Foods |
D3 in olive oil softgels | 1,000 IU per serving | 360 | Low | Amazon → |
| Vitamin D3 1000 IU Softgels Nature Made |
D3 in soybean oil softgels | 1,000 IU per serving | 300 | Low | Amazon → |
| Vitamin D-3 2,000 IU Softgels NOW Foods |
D3 in olive oil softgels | 2,000 IU per serving | 240 | Low | Amazon → |
| Vitamin D3 2000 IU Softgels Nature's Bounty |
D3 in soybean oil softgels | 2,000 IU per serving | 350 | Low | Amazon → |
| Vitamin D3 5000 IU Softgels Doctor's Best |
D3 in olive oil softgels | 5,000 IU per serving | 360 | Low | Amazon → |
| Vitamin D3 2000 IU Mini Softgels NatureWise |
D3 in olive oil mini softgels | 2,000 IU per serving | 360 | Low | Amazon → |
Compare all Vitamin D products →
| Product | Form | Per serving | Count | Cost per day | |
|---|---|---|---|---|---|
| Magnesium Citrate 200 mg TabletsBest value NOW Foods |
Citrate | 400 mg | 250 | Low | Amazon → |
| Magnesium Bisglycinate Powder (Albion)Best value NOW Foods |
Bisglycinate powder (Albion) | 250 mg | 91 | Low | Amazon → |
| Magnesium Citrate Pure PowderBest value NOW Foods |
Citrate powder | 435 mg | 76 | Low | Amazon → |
| Natural CALM Magnesium Powder (Raspberry Lemon)Best value Natural Vitality |
Citrate (magnesium carbonate + citric acid, forms when mixed with water) | 325 mg | 100 | Low | Amazon → |
| Magnesium (Citrate) 100 mg Life Extension |
Citrate | 200 mg | 100 | Low | Amazon → |
| High Absorption Magnesium (Glycinate Lysinate Chelate) Doctor's Best |
Glycinate/lysinate chelate (Albion) | 200 mg | 240 | Low | Amazon → |
| Magnesium Citrate Veg Capsules NOW Foods |
Citrate | 400 mg | 240 | Low | Amazon → |
| Magnesium Glycinate 100 mg (Albion) NOW Foods |
Bisglycinate chelate (Albion) | 200 mg | 180 | Average | Amazon → |
Compare all Magnesium products →
| Product | Form | Per serving | Count | Cost per day | |
|---|---|---|---|---|---|
| Burp Less Ultra Omega-3 from Fish Oil 1400 mgBest value Nature Made |
EE (ethyl ester), enteric-coated | 935 mg | 90 | Low | Amazon → |
| Triple Strength Omega-3 950 mg Solgar |
EE (ethyl ester) | 882 mg | 100 | Low | Amazon → |
| Triple Strength Omega-3 Fish Oil 2400 mg, Lemon Nature's Branch |
Form not listed, lemon flavor | 1440 mg | 180 | Low | Amazon → |
| Extra-Strength Omega-3 Fish Oil 1000 mg + Vitamin E, Lemon NatureWise |
EE (ethyl ester), lemon flavor | 1000 mg | 60 | Low | Amazon → |
| Triple Strength Omega-3 Fish Oil 1250 mg (Wild Alaska Pollock) Sports Research |
rTG (re-esterified triglyceride) | 950 mg | 90 | Average | Amazon → |
| Triple Strength Omega-3 Fish Oil 2000 mg Dr. Tobias |
Form not listed, enteric-coated | 1400 mg | 180 | Average | Amazon → |
| Burp Less Omega-3 Fish Oil 1400 mg Minis Nature Made |
EE (ethyl ester), mini softgels | 930 mg | 60 | Average | Amazon → |
| Triple Strength Omega-3 Fish Oil 3000 mg, Lemon BioSchwartz |
Form not listed, lemon flavor | 2100 mg | 90 | Average | Amazon → |
Compare all Omega-3 products →
Cost per day is relative — compared with other products of the same supplement. Check Amazon for the current price. Some links are affiliate links.