
When to Take L-Carnitine: Finest Time & Dosage
L-carnitine has turn into fairly well-liked within the health business over the previous few years because it’s turn into well-known for its means to help weight reduction, struggle illness, enhance well being and mind perform, and result in higher getting older.
And as a naturally produced amino acid, it appears to pop up in each new fats burner as the newest “must-have” ingredient. However what precisely is L-carnitine, and the way does it work?
On this article, we’ll see if l-carnitine is all it is cracked as much as be, together with offering you with one of the best time, dose, and technique to take it for optimum outcomes.

L-carnitine is an amino acid that’s naturally occurring in the environment in addition to our our bodies.
Your physique can produce l-carnitine naturally by synthesizing the amino acids lysine and methionine. Simply be certain that to get your day by day dose of vitamin C, as it is a central part of this synthesis.
Along with the pure manufacturing of l-carnitine, you may as well eat small quantities by consuming numerous animal merchandise akin to meat and dairy (carn=meat). Under is the l-carnitine content material of some entire meals:
|
Meals |
Serving |
L-Carnitine (mg) |
|
Beef steak |
3 ounces |
81 |
|
Floor beef |
3 ounces |
80 |
|
Pork |
3 ounces |
24 |
|
Canadian bacon |
3 ounces |
20 |
|
Milk (entire) |
8 fluid ounces (1 cup) |
8 |
|
Fish (cod) |
3 ounces |
5 |
|
Hen breast |
3 ounces |
3 |
|
Ice cream |
4 ounces (½ cup) |
3 |
|
Avocado |
1 medium |
2 |
|
American cheese |
1 ounce |
1 |
|
Complete-wheat bread |
2 slices |
0.2 |
|
Asparagus |
6 spears (½ cup) |
0.2 |
Supply: Oregon State College
Regardless that you’ll be able to produce l-carnitine by your self, l-carnitine is taken into account a conditionally important nutrient. Many individuals both cannot make or do not eat sufficient, whether or not from poor food regimen or genetic points. As such, loads of situations require further care to make sure you’re assembly your wants.
One state of affairs the place this rings true is in vegans, who are likely to have a l-carnitine deficiency. As vegans do not eat animal merchandise, the first supply of l-carnitine, it is difficult for them to keep up an ample provide.
Enter l-carnitine supplementation. Vegans and equally poor populations can take exogenous l-carnitine in supplemental kind, whether or not tablet or powder.
It is vital to grasp that there are numerous types of l-carnitine, which means there are a number of various kinds of l-carnitine that you could possibly purchase.
D-carnitine is an inactive type of carnitine. It will possibly assist to scale back blood ranges of carnitine and improve fats buildup, resulting in liver irritation and oxidative stress¹.
Acetyl-l-carnitine (ALCAR) is believed to be the best type of carnitine for mind well being. Research recommend that it could profit folks with neurodegenerative diseases².
I like Naturalife Labs Acetyl L-Carnitine, which comprises 1,500mg of 100% pure Acetyl L-Carnitine per serving and will help enhance temper, power, studying, and reminiscence.
Propionyl-L-carnitine is a type of l-carnitine often attributed to treating circulatory points akin to peripheral vascular illness and hypertension. Analysis reveals it could enhance blood circulate by way of the rise within the manufacturing of nitric oxide³.
Searching for a product advice? Swanson Propionyl L-Carnitine with Glycine comprises 515mg propionyl l-carnitine and 150mg glycine per capsule, supporting cardiovascular well being, mobile power, and muscle power.
The commonest variation of l-carnitine for improved sports activities efficiency is l-carnitine l-tartrate, generally added to sports activities dietary supplements because of its speedy absorption fee. It could help muscle soreness and restoration in exercise⁴.
I like to recommend Nutricost L-Carnitine Tartrate Powder, which delivers 1 gram of L-carnitine tartrate per serving and is manufactured in a GMP-compliant, FDA-registered facility.
L-carnitine performs a number of roles contained in the human physique, with its major perform being to optimize mitochondrial perform and power manufacturing.
By transporting fatty acids into the cell’s mitochondria, it permits them to be transformed into power. And for those who bear in mind something out of your center college biology class, fatty acids present an extremely sustainable power supply. Tissues with excessive power necessities (learn: the mind and the center) particularly depend on fatty acids for power.
Analysis suggests this could play a task within the following:
- Promotes wholesome getting older
- Helps weight reduction
- Helps to struggle illness
- Improves well being and mind perform
Totally different variations of l-carnitine dietary supplements are fitted to completely different functions, so it is vital to know why you need to take l-carnitine.

Now that what l-carnitine does, let’s go over the science-backed advantages. Analysis means that l-carnitine performs a task in a number of completely different processes, a lot of which encompass the conversion of fatty acids into gas.
Sustaining excessive power ranges can mitigate mitochondrial dysfunction and preserve your techniques working optimally.
As talked about above, l-carnitine performs a major function in power manufacturing and mitochondrial perform. Since l-carnitine is a major fatty acid transportation system, it is smart that with extra obtainable l-carnitine, one can transport extra fatty acids, leading to extra fats loss.
One meta-analysis researched and in contrast 9 research of the impact of l-carnitine supplementation on weight loss⁵. They concluded that obese people who supplemented misplaced an additional 2.9 lbs (1.3 kg).
In 2020, one other meta-analysis checked out 37 completely different randomized managed research researching the consequences of l-carnitine on physique fats share, physique composition, and BMI⁶.
In conclusion, they decided that l-carnitine supplementation modestly affected fats loss. Particularly:
- Lowered physique weight −1.21 kg
- Lowered BMI by −0.24 kg/m2
- Lowered fats mass by −2.08 kg
You may be taught extra about this in our article: L Carnitine For Weight Loss: Does It Truly Work?
Because of its function in transferring of lengthy chain fatty acids, l-carnitine has lengthy been thought-about as a approach to assist normalize lipid profiles and enhance glycemic management.
A latest research from 2020 confirmed this to be true⁷. When taking 1,500mg day by day, l-carnitine supplementation efficiently improved lipid profiles by growing HDL and decreasing LDL ldl cholesterol.
In 2017, a meta-analysis discovered that supplementation successfully handled sufferers with congestive coronary heart failure⁸. In these research, the quantity taken ranged from 1,500mg-6,000mg a day.
Diabetes is a major well being situation within the Western world, with roughly 10.5% of the American inhabitants affected. With that being the case, any efficient remedy may carry immense advantages.
A assessment from 2023 checked out 41 completely different trials and concluded with optimistic results⁹. Outcomes confirmed that L-carnitine supplementation lowered each fasting blood sugar and hemoglobin A1c.
As well as, it improved insulin sensitivity in folks with diabetes, probably as a result of optimization of pancreatic cell perform, which is chargeable for insulin manufacturing.
Whereas it’s nonetheless largely misunderstood, l-carnitine is considered able to lowering signs of despair. As of now, quite a few research again this perception.
For instance, in 2018, a meta-analysis was carried out and checked out 12 completely different research inspecting the connection between l-carnitine and despair10.
Not solely did they discover that l-carnitine supplementation improved signs higher than placebos, however researchers additionally discovered that it produced comparable outcomes to widespread anti-depression treatment.
Because of its function in power manufacturing, it is believed that l-carnitine performs a task in a number of performance-related areas. For instance, l-carnitine supplementation has been utilized by each elite and leisure athletes to assist optimize exercise restoration. Varied advantages embody much less discomfort and sooner restoration times¹¹.
One other key good thing about l carnitine dietary supplements is improved endurance by way of lowered fatigue¹². This comes from its means to extend oxygen provide, blood circulate, and nitric oxide manufacturing.
Relating to the timing of l-carnitine supplementation, researchers have no proof that timing issues a lot, aside from one little bit of nuanced info.
We do know that insulin is required to load l-carnitine into the skeletal muscle cells. For that reason, you must all the time pair your l-carnitine consumption with wholesome carbs to trigger an insulin spike¹³. Due to this fact, one of the best time to take your l-carnitine is with a meal containing anyplace from 30-60g of carbs.
The one different occasion the place timing could make a distinction is for improved efficiency. If you wish to use l-carnitine supplementation to boost efficiency, take it 30-60 minutes earlier than an occasion. This may permit your physique to optimize the utilization of fat for gas, saving glucose and enhancing endurance and workload.
As you’ll be able to see, analysis on timing for l-carnitine remains to be in its infancy. I am nonetheless not totally certain of the precise mechanisms of fats loss, so researchers aren’t optimistic about one of the best time to take l-carnitine for fats loss, if one exists.
Of the entire completely different advantages of l-carnitine, train efficiency is the one one we’ve got rationale for timing. Because of elevated fats metabolism, you must take l-carnitine 1 hour earlier than train.
Nevertheless, understand that l-carnitine can enhance muscle endurance and workload. If l-carnitine will help you carry out extra work within the fitness center, this may also translate to extra energy burned. Due to this fact, if you’re understanding (which you have to be!), including some l-carnitine to your peri-workout complement stack is smart.
Searching for different methods to amp up your complement stack and enhance fats loss? Try our 8 Finest Dietary supplements For Fats Loss to load up on the highest, evidence-based substances to drop some weight.

Dosing can fluctuate fairly a bit, however most research advocate 500-1,500mg per day14. That mentioned, because of bioavailability points, many advocate a a lot increased dosage, akin to:
- L-Carnitine: 4-6 grams
- L-Carnitine L-Tartrate: 6-8 grams
As talked about, for greatest outcomes, take the above dose with 60g of carbs, because it’s believed to assist with absorption. Lastly, l-carnitine could require continual oral ingestion to construct up within the muscle cells. Due to this fact, it is believed that you could be have to take it for an prolonged interval to see any actual results.
The optimum dosage for weight reduction is tough to pinpoint. Whereas research recommend 1,500mg a day, many precise customers will recommend 3g/ day and even consuming 2g twice a day.
Notice that these numbers are along with no matter you eat all through the day in your food regimen. Nevertheless, it is extremely troublesome to precisely monitor how a lot you eat by way of meals.
Due to this fact, for those who eat a whole lot of meat, your l-carnitine supplementation necessities could also be on the decrease finish. Nevertheless, you will want the next day by day dose for those who’re a vegan or do not eat a lot meat.
To be taught extra about l carnitine and shedding weight, head to our article: Is L Carnitine Good For Weight Loss?
Typically talking, l-carnitine dietary supplements are thought-about secure. After all, there’s all the time an higher most tolerable restrict, nevertheless it’s unclear what it’s.
Research recommend it may vary relying on the particular person, however some science and anecdotal proof recommend 6g a day, so we might err on the facet of warning.
When taking l-carnitine, it’s essential perceive that it’s completely different from different dietary supplements. In contrast to a pre-workout which will be felt instantly, it may well take weeks and even months to note a considerable enchancment.
Due to this fact, for those who’re contemplating taking l-carnitine, you have to be ready to take it day by day for not less than just a few months. Thankfully, it appears which you could take carnitine daily for 12 months with none antagonistic response.
Reddit customers assist make clear some actual experiences:
“I have been utilizing 3g of oral l-carnitine with 3g of garlic each morning whereas fasting. I usually minimize by fasting, however this time, I’ve undoubtedly seen a distinction In how a lot fats I’m dropping, and I’m retaining extra muscle proportionally.” (supply)
“L-Carnitine is the one factor to date that’s really serving to me lose undesirable fats. I all the time drink a tablespoon of 3000mg 45 minutes earlier than my cardio exercises, and I simply love the endurance enhance it provides me.” (supply)
Whereas you should buy l-carnitine as an impartial complement in powder or tablet kind, one other well-liked technique of consumption is thru a fats burner. These are dietary supplements that may include l-carnitine in addition to different compounds that may help in weight reduction.
One in every of my favourite l-carnitine-containing fats burners is Kaged Muscle Clear Burn. One serving of Clear Burn supplies 1000mg of l-carnitine tartrate, which can assist metabolize fats and enhance athletic efficiency.
Clear Burn additionally comprises:
- Inexperienced Tea Extract: For a thermogenic and gentle stimulation
- ChromeMate®: Enhance fats metabolism
- Gymnema Sylvestre Extract: Lower cravings for sweets
One other powerhouse of a fats burner is Clear Labs Stim-Free. Every serving delivers 1000mg of acetyl-l-carnitine, however that is simply the beginning. You additionally get the next:
- Citrulline Malate: 6,000mg
- Beta-Alinine: 2,000mg
- Natural Caffeine: 180mg
- L-Theanine: 180mg
- Plus about ten different high quality substances
One of many advantages of l-carnitine as a fat-burning ingredient is that it is non-stimulating. Which means it is featured in lots of a non-stim fats burner, such because the Clear Burn from Kaged I simply mentioned. Whereas it does include some inexperienced tea extract, it is too small of an quantity for any actual “stimulant” results.
In case you may have any lingering questions, let’s study a number of the extra widespread issues folks ask about l-carnitine supplementation.
For train efficiency or weight reduction, taking l-carnitine 30-60 minutes earlier than train appears to be probably the most generally prompt time.
Completely! l-carnitine has quite a few advantages fully separate from train, akin to an improved coronary heart well being.
Sure! These compounds work by way of completely different mechanisms so will be taken collectively.
Sure! In truth, research that have a look at the impact of pairing these compounds present a whole lot of success¹⁵.
There are not any research that recommend this is able to be useful.
Acetyl l-carnitine will be bought at nearly any diet retailer or pharmacy. Nevertheless, the preferred place will certainly be Amazon. For instance, take a look at Naturalife Labs Acetyl L-Carnitine, which has a 4.5-star ranking from 10,254 actual customers. That is about as top-rated as you will get.
L-carnitine seems to be a promising complement assuming you may have the right expectations. With regards to weight reduction, perceive that l-carnitine will not be a miracle drug that may soften fats off of you.
You need to nonetheless decide to a calorie-restricted food regimen and an efficient weight-based train program. Upon getting this beneath management, constant l-carnitine supplementation can speed up your weight reduction efforts.
Lastly, its function typically well being and wellness makes it an vital compound for almost everybody, not simply those that want to drop some weight.
