L Carnitine
L-Carnitine is created in the body from the amino acids lysine and methionine. It's massively popular in the fitness community, whether people are trying to tone-up or lose weight — and can be time-consuming and expensive to get from your diet alone.
Whatever your fitness goals, we’ve got ready-to-mix powders and convenient-to-take capsules that help make sure you’re getting the carnitine you need to push for progress. Take a look at our best L-Carnitine supplements...
Shop L Carnitine at Myprotein
L-carnitine is a naturally occurring compound found in the body, synthesised from the amino acids lysine and methionine. It plays a key role in transporting long-chain fatty acids into the mitochondria, where they can be used as fuel — making it a staple ingredient in the supplement stacks of athletes, gym-goers, and anyone with an active lifestyle. The l-carnitine range spans tablets, capsules, liquids, and powders, so there's a format to fit every routine.
Every l-carnitine supplement is developed to deliver a precise, consistent dose in a convenient form. Whether you're after the no-fuss simplicity of a tablet or the fast-absorbing format of a liquid, the range has you covered — all formulated by Myprotein's expert nutritionists to the same high standard.
Who L Carnitine Is For
L-carnitine is a popular choice among endurance athletes — runners, cyclists, and triathletes — who want to include a well-researched compound in their training nutrition. It's also widely used by people following a calorie-controlled approach to their diet, given that l-carnitine is found naturally in red meat and dairy, and dietary intake can vary significantly depending on eating habits.
It's equally well-suited to those who train in a fasted state or earlier in the day, before food intake has built up. Vegetarians and vegans may find l-carnitine supplementation particularly relevant, as plant-based diets tend to provide far less carnitine than omnivorous ones. Whichever format suits your lifestyle best — tablet, capsule, powder, or liquid — there's a straightforward option here.
When to Use L Carnitine
Most people choose to take l-carnitine before training — typically 30 to 60 minutes ahead of a session. This aligns with when you want the compound present and active. Taking it alongside a source of carbohydrates may also be a useful consideration, as insulin plays a role in carnitine uptake in muscle tissue.
Outside of pre-workout timing, some people split their l-carnitine intake across the day — particularly those using higher daily doses. The format you choose can influence when it fits best: tablets and capsules are easy to take on the go, while l-carnitine powder can be mixed into a shake or pre-workout blend for a more convenient, all-in-one approach.
L Carnitine Benefits
A Naturally Occurring Compound
L-carnitine isn't a synthetic invention — it's a compound the body already produces and uses. Derived from the amino acids lysine and methionine, it's found naturally in meat and dairy products. Supplementing with l-carnitine is simply a way of ensuring consistent intake, especially for those whose diet may not provide much of it.
Multiple Formats to Suit Your Routine
The l-carnitine range includes tablets delivering 682mg per serving, capsules providing 1g per serving, a versatile powder form, and liquid options — giving you genuine flexibility over how you supplement. Whether you prefer the simplicity of a tablet or the mix-and-match nature of a powder, there's no compromise required.
Precise, Consistent Dosing
Each format is formulated to deliver a reliable, measured dose of l-carnitine every time. No guesswork, no inconsistency — just a straightforward way to include a well-known compound in your daily nutrition. Knowing exactly how much you're taking makes it easy to build l-carnitine into a structured supplement routine.
Fits Alongside Other Supplements
L-carnitine works well as part of a broader supplement stack. The powder format is particularly flexible — easy to combine with a pre-workout, protein shake, or amino acid blend. For those already using a structured supplement routine, adding l-carnitine requires minimal adjustment.
Popular Picks
L-Carnitine Tablets — A vegan-friendly carnitine tablet delivering 682mg per serving for those who want a no-fuss, straightforward way to hit their daily carnitine intake.
Liquid L-Carnitine Capsules — With 1g of naturally occurring L-carnitine per serving in an easy-to-take capsule, this one works whatever your fitness goal looks like.
Origin Shred Pre-Workout — Built for those who want a natural edge before training, Origin Shred combines caffeine from green coffee and green tea with choline and B vitamins including niacin, B6, B12, and biotin.
FAQs
What is l-carnitine?
L-carnitine is a naturally occurring compound synthesised in the body from the amino acids lysine and methionine. It's found in dietary sources such as red meat and dairy, and is also available as a supplement in tablet, capsule, powder, and liquid forms. It's one of the most widely used compounds in sports nutrition.
What is l-carnitine made from?
L-carnitine is produced in the body from two essential amino acids — lysine and methionine — with the help of vitamins C, B6, and niacin. In supplement form, l-carnitine is typically produced through a fermentation process, resulting in the same biologically active form found naturally in the body.
Is l-carnitine suitable for vegetarians and vegans?
Vegetarians and vegans tend to have lower dietary carnitine intake, since the richest food sources are meat and dairy. Most l-carnitine supplements are suitable for vegetarians and vegans — always check the individual product label to confirm. The l-carnitine capsules, tablets, and powder formats are all worth checking if plant-based suitability is a priority for you.
What's the difference between l-carnitine tablets, capsules, liquid, and powder?
The active ingredient is the same across all formats — the differences come down to convenience, dose, and how you prefer to take it. Tablets offer a compact, pre-measured option. Capsules deliver 1g of l-carnitine per serving in an easy-to-swallow form. Powder mixes into drinks for flexibility. Liquid l-carnitine is fast to consume and can be taken straight or added to a shake. Choose the format that fits your daily routine.
How much l-carnitine is in each serving?
Serving sizes vary by format. L-Carnitine Tablets deliver 682mg of carnitine per serving, while Liquid L-Carnitine Capsules provide 1g per serving. The l-carnitine powder and liquid formats may differ — always check the product label for the exact per-serving amount so you can dose accurately.
When should I take l-carnitine?
L-carnitine is most commonly taken 30 to 60 minutes before a training session. Some people choose to take it alongside a meal containing carbohydrates, as insulin plays a role in carnitine uptake in muscle tissue. Those using higher daily doses sometimes split intake across morning and pre-workout timings.
Can I stack l-carnitine with other supplements?
L-carnitine is commonly included alongside pre-workout formulas, protein shakes, and amino acid blends. The powder format is particularly easy to combine with other supplements. If you're already using a structured nutrition stack, l-carnitine can slot in without major adjustment — just check individual product guidance for serving recommendations.
Who developed the l-carnitine supplements?
All l-carnitine supplements are developed by Myprotein's expert nutritionists, who formulate each product to deliver a precise, consistent dose in a format that's practical for everyday use. The same quality standards apply across every format in the range — tablets, capsules, powder, and liquid.
How do I choose between the different l-carnitine supplements available?
If convenience and portability are your priority, L-Carnitine Tablets are a straightforward pick at 682mg per serving. For a higher per-serving dose in capsule form, Liquid L-Carnitine Capsules deliver 1g. If you want to mix l-carnitine into a pre-workout or shake, the powder format gives you the most flexibility. Your choice really comes down to how and when you prefer to take it.
Is l-carnitine a stimulant?
L-carnitine is not a stimulant. It doesn't contain caffeine and won't cause the kind of energy spike associated with stimulant-based pre-workouts. It's a compound naturally present in the body and can be taken at any time of day without affecting sleep if taken in the evening — though most people prefer to time it around training.
1. Choline contributes to normal lipid metabolism.