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Low Blood Sugar Signs: Know the Symptoms and the Next Step
Low blood sugar signs include shakiness, hunger, tiredness, dizziness, confusion, irritability and a fast or irregular heartbeat. For many people with diabetes, low means under 70 mg/dL. The usual fix is 15 to 20 grams of fast carbohydrate, then a recheck in 15 minutes.
Written by the Glyco Defender label deskUpdated · 4 min read
What are the signs of low blood sugar?
The common signs are shakiness, hunger, tiredness, dizziness, confusion, irritability and a fast or irregular heartbeat (NIDDK, Low Blood Glucose).
- Shaky or jitteryTrembling hands, feeling nervous
- Tired or irritableSudden tiredness or a short temper
- Hungry, nauseousSudden strong hunger
- Dizzy, confusedTrouble thinking or speaking clearly
- Fast heartbeatPounding or racing pulse
15-15For many people with diabetes, a low is under 70 mg/dL. Take 15-20 g of fast carbohydrate (juice, glucose tablets), then check again in 15 minutes.
Call 911When someone with a low passes out, has a seizure or cannot safely swallow. Do not give food or drink to someone who is unconscious.
Signs and steps from NIDDK (NIDDK, Low Blood Glucose). Insulin, sulfonylureas and meglitinides can cause lows; supplements may add to them (ADA, Vitamins & Supplements).
What blood sugar level counts as low?
For many people with diabetes, low blood sugar means a reading under 70 mg/dL (NIDDK, Low Blood Glucose). Ask your care team, since your own target may differ.
| Reading | Meaning |
|---|---|
| Under 70 mg/dL | Low for many people with diabetes |
| Fasting under 100 mg/dL | Normal range for a fasting test |
| Fasting 100-125 mg/dL | Prediabetes range (NIDDK, Diabetes & Prediabetes Tests) |
What causes low blood sugar, and can a supplement play a part?
Insulin, sulfonylureas and meglitinides are the best-known causes (NIDDK, Low Blood Glucose).
The American Diabetes Association adds that some supplements can cause lows when combined with diabetes medicines (ADA, Vitamins & Supplements). Glyco Defender has 7 mcg of chromium, and chromium may add to the effect of diabetes drugs (NIH ODS, Chromium).
A low is not a reason to quit a medicine on your own. Call your doctor and ask what to change.
More in side effects.
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See packsWhat should you do when you notice low blood sugar signs?
Take 15 to 20 grams of fast carbohydrate, wait 15 minutes, then recheck (NIDDK, Low Blood Glucose).
Eat or drink fast carbs
Juice or glucose tablets work. Food with fat or protein acts slower.
Wait and recheck
Check again after 15 minutes. Repeat if still low.
Call 911 when needed
Call if the person passes out, has a seizure or cannot swallow safely.
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FAQ01
Questions about low blood sugar
Can you have low blood sugar without diabetes?
It is less common, but it can happen. Shakiness and hunger can have other causes too. If signs repeat, see a doctor for tests instead of guessing or treating yourself with a supplement.
How fast do low blood sugar signs go away?
Many ease within about 15 minutes after 15 to 20 g of fast carbohydrate, which is why the recheck comes then (NIDDK, Low Blood Glucose). If you are still low, repeat the step and call your care team.
Is shakiness always a sign of low blood sugar?
No. Caffeine can also cause jitters, and Glyco Defender lists guarana and green tea with no caffeine amount printed (MSKCC, Guarana). A meter reading is the only way to tell the two apart.
Who wrote this02
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Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a licensed U.S. retail desk for Glyco Defender, not by the manufacturer or the label's distributor. Buying through our order links earns us money.
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