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L-Carnitine and Insulin Sensitivity: What Studies Show
L-carnitine and insulin sensitivity have been studied in type 2 diabetes at about 2 to 3 g a day, with some improvement in fasting glucose and a call for larger trials. L-carnitine is the last of 22 lines in Sugar Defender's 200 mg blend, so one mL holds at most about 9 mg. That is far below the studied range.
Written by the Sugar Defender label deskUpdated · 4 min read
The research01
What do studies say about L-carnitine and insulin sensitivity?
Studies in people with type 2 diabetes used about 2 to 3 g of L-carnitine a day and reported some improvement in fasting glucose. The authors asked for larger trials (NIH ODS, Carnitine).
A broader review pooled doses from 0.25 to 4 g a day. None of this work tested a drop-style formula, and none involved a 22-ingredient blend.
The body also makes its own carnitine, so healthy people generally do not need a supplement (NIH ODS, Carnitine).
On the label02
How much L-carnitine is in Sugar Defender?
The label does not say. L-carnitine base sits in 22nd place, the last line of a 200 mg proprietary blend, and the amount is hidden.
US rules let a blend print only its total weight and list parts from most to least (21 CFR 101.36 (eCFR)). Last place means the smallest share. An even split of 200 mg across 22 lines is about 9 mg per mL, so L-carnitine cannot hold more than that.
Worked example: a studied dose of 2 g is 2,000 mg. Divide by 9 mg and you get more than 200 servings of the drops for one day of the studied amount. A bottle holds 60.
That is arithmetic from the label, not a lab result. The real amount is lower than or equal to 9 mg, and the maker does not publish it.
Dose check03
Is the L-carnitine dosage in the drops close to the studies?
No. The ceiling in one serving is under 1% of the low end of the studied range.
| Item | Amount per day |
|---|---|
| Type 2 diabetes studies | About 2,000-3,000 mg (NIH ODS, Carnitine) |
| Broader review range | 250-4,000 mg (NIH ODS, Carnitine) |
| Sugar Defender, 1 mL, label order | At most about 9 mg |
Sugar Defender: from $49 a bottle60 mL · 2, 3 or 6 bottles · free US shipping on 3 or 6 · 60-day money-back guarantee
See packsContext04
Does insulin sensitivity change with a supplement alone?
Not in any way a label can promise. Insulin resistance means the body does not respond to insulin as it should, and weight and inactivity are the main risk factors (NIDDK, Insulin Resistance & Prediabetes).
In the Diabetes Prevention Program, losing 5 to 7% of starting body weight lowered diabetes risk (NIDDK, Insulin Resistance & Prediabetes). The ADA also finds no supplement proven to lower glucose without a deficiency (ADA, Vitamins & Supplements). Our insulin resistance basics guide covers the habits that carry the evidence.
Carnitine at about 3 g a day can cause nausea, cramps, diarrhea and a fishy body odor (NIH ODS, Carnitine). Keep taking prescribed medicine, and tell your care team about any supplement.
If you try it05
What does it cost to try the drops yourself?
Three bottles cost $207 and six cost $294, with free US shipping. Two bottles are $158 plus shipping.
A 60-day money-back guarantee covers official orders. See each line in the amino acid group review before you decide.
Sugar Defender: from $49 a bottle60 mL · 2, 3 or 6 bottles · free US shipping on 3 or 6 · 60-day money-back guarantee
See packs| Pack | 2 bottles | 3 bottles | 6 bottles |
|---|---|---|---|
| Bottles | 2 | 3 | 6 |
| Total mL (servings) | 120 mL (120) | 180 mL (180) | 360 mL (360) |
| Price per bottle | $79 | $69 | $49 |
| Total | $158 | $207 | $294 |
| Days at the label's 1 mL a day | 120 | 180 | 360 |
| Per day at 1 mL | about $1.32 | about $1.15 | about $0.82 |
| Days as the order page counts | 60 | 90 | 180 |
| Per day on that count | about $2.63 | about $2.30 | about $1.63 |
| Shipping (US) | Added at checkout | Free | Free |
| Digital e-books | None | Two | Two |
| Guarantee | 60 days | 60 days | 60 days |
FAQ06
Sugar Defender questions people ask
Does L-carnitine lower blood sugar?
Studies in type 2 diabetes saw some improvement in fasting glucose at 2 to 3 g a day, and larger trials are needed (NIH ODS, Carnitine). No supplement is proven to treat diabetes.
What are the side effects of L-carnitine?
About 3 g a day can cause nausea, cramps, diarrhea and a fishy body odor (NIH ODS, Carnitine). The drops hold far less, but tell your doctor about any supplement you use.
Do you need L-carnitine if you are healthy?
Usually not. The body makes carnitine, and healthy people generally do not need supplements (NIH ODS, Carnitine).
Who wrote this07
Written and reviewed by
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 Isugardefender, a Sugar Defender U.S. shop, not by the manufacturer or the distributor. We earn money when you buy through our order links.
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