If you're wondering whether this L-carnitine works for energy and workouts, the honest answer is maybe: the research is mixed. MusclePharm Select L-Carnitine 3000 is a liquid, stimulant-free supplement that the seller markets to women and men for energy and performance. A Healthline review of L-carnitine cites a 2020 review of 37 trials in which supplements reduced body weight and fat mass but not belly fat. It also cites a 2021 systematic review of exercise studies, where some found benefits and others found none. So if you're hoping for a clear workout boost, don't count on it.
Disclosure: Some links on this page are affiliate links. Buying through them may earn us a commission. There is no extra cost to you.
| What it is | Liquid L-carnitine supplement, one tablespoon (15 ml) per serving |
| Who sells it | MusclePharm, per its product page |
| Price as shown | $29.99 sale price, as of November 3, 2026 |
| Flavors | Sour Cherry, Peach Nectarine, Blue Raspberry |
| Product Page | Where to Buy |
What is MusclePharm Select L-Carnitine 3000, and who is it for?
It is a sugar-free, calorie-labeled liquid that you add to cold water. You may also see it searched as musclepharm select l carnitine 3000, which is the same MusclePharm product. The product page calls it “the ultimate stimulant-free workout supplement for women and men.” It also says the product is “only intended for use by healthy adults over 18 years of age.”
What does the seller say it does?
MusclePharm's product page says the product is for “Fuel Your Body. Enhance Energy. Support Performance.” It says the blend of three L-carnitine forms is designed to “turbocharge your body's natural metabolic processes and bolster energy production,” and that it provides “mitochondrial support” for hitting the gym, running, or seeking to “enhance metabolism.”
The mechanism is the one Healthline describes for L-carnitine in general: it “plays a key role in energy production by transporting fatty acids into your cells' mitochondria.” Healthline also says its benefits for exercise may be indirect and take weeks or months to appear.
What is in MusclePharm Select L-Carnitine 3000?
The Supplement Facts panel on the product page lists the following for one serving, which is 1 tablespoon (15 ml).
| Ingredient (as labeled) | Amount per serving |
|---|---|
| Calories | 15 |
| MusclePharm L-Carnitine, total | 3,000 mg (3.0 g) † |
| L-Carnitine | 2,000 mg (2 g) † |
| Acetyl-L-Carnitine HCl | 500 mg † |
| L-Carnitine L-Tartrate | 500 mg † |
The three listed forms add up to the 3,000 mg total. The label marks these amounts with †, and says Daily Value (DV) is not established.
Other ingredients: water, phosphoric acid, natural and artificial flavors, L-malic acid, citric acid, sucralose, acesulfame potassium, potassium sorbate (preservative), and sodium benzoate (preservative).
The product page contains two small differences you should confirm. One ingredient list says “Natural & Artificial Flavors” and the other says “Natural Flavors.” The description calls the Peach Nectarine liquid “calorie-free,” while the Supplement Facts panel lists 15 calories per tablespoon. Check the bottle label for the final wording.
Healthline describes the acetyl form as the one used in brain-health studies, with doses of 500 to 3,000 mg per day. It describes the L-tartrate form as “most effective for exercise performance,” with doses of 1,000 to 4,500 mg per day. You can read more in our summary of what L-carnitine trials found (our research library).
Directions, warnings, storage and allergens
The directions say to take 1 serving (1 tablespoon, about half a capful) with 5 to 7 fl. oz. of cold water once daily, “or as directed by a healthcare professional.” Shake before use. The product page says to use it “as part of a healthy diet and exercise program.”
The warnings say to keep it out of reach of children and to not exceed the recommended dose. They also say not to use it if you are pregnant or nursing, if you are at risk or being treated for any medical condition, or if you take a MAO inhibitor. The product page says not to use it if the safety seal is damaged or missing.
Storage is “refrigerate after opening.” The seller says exposure to heat, light, or air can affect quality, so keep it sealed and out of direct light or heat.
Allergens: the product page says it “was produced in a facility that may also process milk, soy, wheat, egg, peanuts, tree nuts, fish, and crustacean shellfish.”
To confirm testing before you order, ask MusclePharm which lab tests the product and where the results are published.
Does MusclePharm L-Carnitine 3000 actually work?
The research is mixed, and it helps to know which parts apply to this product. A 2021 systematic review (Mielgo-Ayuso et al.) looked at oral L-carnitine and exercise performance. Healthline reports that some of those studies suggest benefits for exercise and muscle recovery, muscle oxygen supply, and exercise performance, endurance, and power. It also reports that some studies found no significant benefit.
Healthline also says that “This differs from supplements like caffeine or creatine, which can directly enhance sports performance.” If you are comparing products, that is the point to weigh.
For a realistic result, plan on weeks or months rather than days. Healthline says the exercise benefits “may also be indirect and take weeks or months to appear.”
Does L-carnitine lose belly fat, and how long until you see results?
A 2020 review of 37 trials, cited by Healthline, found that L-carnitine supplementation “significantly reduced body weight, body mass index (BMI), and fat mass. However, it had no effect on belly fat or body fat percentage.” Healthline adds that more research is needed on long-term weight loss.
The product page's wording is about energy and metabolism: “enhance metabolism” and “enhances energy levels.”
What happens if you take L-carnitine every day, and what are the downsides?
The product page says to take one serving once daily. The table below sets the label dose against what Healthline and the label say about safety.
| Topic | What the sources say |
|---|---|
| Dose | Healthline says “For most people, taking 2 g or less per day is relatively safe and unlikely to cause serious side effects.” The label lists 3,000 mg per serving, which is more than that 2 g figure. |
| Common mild effects | Healthline says “some mild side effects like heartburn and indigestion are possible.” |
| Higher doses in studies | Healthline says “Some studies have also used doses up to 4,500 mg per day.” |
| TMAO | Healthline says L-carnitine supplements “may raise your blood levels of trimethylamine-N-oxide (TMAO) over time,” and that high TMAO levels “are linked to an increased risk of atherosclerosis.” It adds that more safety studies are needed. |
| Medications | The label says to consult your physician if you take prescription or over-the-counter medications or supplements. |
For more on side effects in studies, see L-carnitine side effects in studies (our research library).
Price and total cost
The product page shows one price, $29.99 as a sale price, above the flavor options, as of November 3, 2026. Prices and bundles can change, so check the checkout for today's price.
| Cost item | What the product page shows |
|---|---|
| Price | $29.99 sale price (November 3, 2026) |
| Flavors | Sour Cherry, Peach Nectarine, Blue Raspberry |
| Serving | 1 tablespoon (15 ml), once daily |
| Price per serving | Divide $29.99 by the servings printed on your bottle label. |
| Shipping | Check the shipping cost at checkout. |
Refunds, returns and cancelling
Read the returns and refund terms at checkout or on the seller's site before you pay. Keep your order confirmation. If you need to return or cancel, use the support contact the seller gives you on that confirmation.
Is MusclePharm Select L-Carnitine 3000 legit?
Here is what you can check yourself.
- Who sells it: the product is on MusclePharm's own product page, at musclepharm.com. The page also has a store locator button, so you can check whether a local store carries it.
- Who is listed at checkout: confirm on the checkout page which company is the seller before you enter payment details.
- Payment: review the payment options offered at checkout before you enter card details.
- Label: the ingredient list, warnings, allergen statement and storage notes are printed on the product page. Compare them with the bottle when it arrives.
- Safety seal: the product page says not to use the product if the safety seal is damaged or missing.
- Buyer reviews: read recent reviews on the product page and on any store where you buy, and look for what they say about flavor, mixing and shipping.
Healthline says the ingredients listed on an L-carnitine label may not be accurate. That is a reason to keep the bottle, compare the label and ask MusclePharm about testing.
How does it compare with food, creatine and doing nothing?
| Option | What the sources say |
|---|---|
| L-carnitine from food | Healthline lists beef at 139 to 143 mg per 3.5 oz (100 g), pork at 25 to 61 mg, chicken at 13 to 34 mg, cow's milk at 40 mg, and hard cheese at 3 mg. It cites a 2004 study finding that 54% to 87% of L-carnitine is absorbed from food, compared with 14% to 18% from supplements. |
| This supplement | A liquid with three L-carnitine forms and 3,000 mg per serving, once daily, at a sale price of $29.99 (November 3, 2026). |
| Creatine | Healthline says creatine can directly enhance sports performance. If you are comparing it with this product, our crazy nutrition crn-5 creatine guide covers that product's ingredients and what you need to know. |
| Doing nothing | Healthline says your body makes L-carnitine from the amino acids lysine and methionine, and that supplements are only necessary in special cases. |
If recovery is the main goal, the muscle recovery supplements guide on this site covers the wider category.
Should you talk to your doctor before taking it?
Talk to your doctor first if any of these apply to you. The label names these groups:
- Anyone under 18, since the product is intended for healthy adults over 18.
- People who are pregnant or nursing.
- People who are at risk or being treated for a medical condition.
- People taking a MAO inhibitor.
- People taking prescription or over-the-counter medications or other supplements, who should consult their physician first.
Healthline adds that if you take certain antibiotics or anticonvulsants, you should speak with a doctor, because the supplement may interact with those medications. It also says that people with cirrhosis or kidney disease have a higher risk of deficiency, and that people who are pregnant have a higher risk of carnitine deficiency. It advises speaking with a doctor before taking L-carnitine in those cases.
Before you order
- Check today's price and shipping cost at checkout. The page showed $29.99 on November 3, 2026.
- Read the refund and returns terms before you pay.
- Compare the flavor wording and the calorie line on the bottle label with the product page.
- Ask MusclePharm which lab tests the product, and where the results are published.
- Count the servings on the bottle label so you can work out the price per serving.
- Check the safety seal when the bottle arrives.
Short answers to common questions
Does L-carnitine affect sleep?
Healthline mentions research on 500 to 510 mg of L-carnitine daily in narcolepsy, a sleep condition. That is a different dose and purpose from this product.
What not to mix with L-carnitine?
If you take prescription or over-the-counter medications or other supplements, the label says to check with your physician before use, and not to use it if you take a MAO inhibitor. Healthline says to talk to a doctor first if you take certain antibiotics or anticonvulsants.
Should I take L-carnitine in the morning or at night?
The product page says once daily or as directed by a healthcare professional. Shake it, then mix one tablespoon with 5 to 7 fl. oz. of cold water.
Can I drink coffee while taking it?
The NHS says caffeine “can also disrupt your usual sleep rhythms,” and that its effects “can last up to 7 hours,” so if you drink coffee, consider the time of day.
Why am I always tired even though I sleep a lot?
Healthline says that if you feel chronically exhausted even when you get adequate rest, a medical condition may be contributing, and it advises talking with a doctor. MedlinePlus says that “Fatigue itself is not a disease; it's a symptom,” and lists causes such as sleep disorders, anemia, and thyroid disease.
Why am I always tired and have no energy?
MedlinePlus lists lifestyle causes such as not getting enough sleep, staying up too late, drinking too much alcohol, too much caffeine, and too little or too much exercise. If you have been tired for weeks, MedlinePlus advises contacting your health care provider. You can read more on the MedlinePlus fatigue page.
What are three warning signs of fatigue?
Cleveland Clinic lists fatigue that lasts longer than a few days, fatigue that comes on suddenly, and fatigue with no clear reason as reasons to talk to your healthcare provider. It also lists being over 65 and losing weight. It says to seek immediate medical attention for fatigue along with shortness of breath or pain in your chest, arm or upper back; a heartbeat that is unusually fast or slow; a heartbeat that is pounding, fluttering or irregular; headache or vision problems (especially if you've hit your head recently); nausea, vomiting or abdominal pain; muscle weakness; or thoughts of harming yourself or others. See the Cleveland Clinic fatigue guide for the full list.
What am I lacking if I'm always tired?
Healthline lists iron, riboflavin, niacin, pantothenic acid, pyridoxine, folate, vitamin B12, vitamin D, vitamin C, and magnesium as nutrients linked to fatigue when they are low. It advises discussing with your healthcare professional whether to test for them. MedlinePlus also lists anemia as a common cause.
What drink gets rid of fatigue?
The NHS says that sometimes you feel tired simply because you are mildly dehydrated, and that “A glass of water will do the trick, especially after exercise.” It also advises cutting back on alcohol before bed and on caffeine later in the day. See the NHS self-help tips on tiredness.
At what age are you most tired?
Cleveland Clinic lists being over the age of 65 as a reason to talk to your healthcare provider about fatigue.
By the Gym Floor Guide Editorial Team