ProSupps L-Carnitine Liquid 3000, Stimulant-Free Liquid Shots, Berry Review

Crank up the energy without cranking up the sugar. ProSupps L-Carnitine is a 100% stimulant-free liquid shot that delivers premium L-Carnitine plus Vitamin B5 in every tablespoon, giving you a clean, sugar-free way to support fat metabolism, natural metabolic energy production, fat transport, and muscle recovery. Available in two potencies—L-Carnitine 1500 for a moderate daily dose, or L-Carnitine 3000 for a full clinical dose—it allows you to choose the option that best fits your goals and routine. It comes in options such as 31 servings or 60 servings and flavors including Berry, Lemon Drop, Blue Razz, Dragon Fruit, and Green Apple. L-Carnitine is a natural compound and important amino acid that plays a key role in helping your body turn fat into energy. Essentially, it acts like a shuttle, transporting long-chain fatty acids into your cells' mitochondria, where they are oxidized and burned as fuel to generate adenosine triphosphate (ATP). This helps your body use stored fat more efficiently as an energy source both when you exercise and rest, though research suggests it is especially effective during intense exercise and longer training sessions. Supplementing with L-Carnitine can boost endurance, reduce fatigue, and improve recovery after tough workouts. Paired with Pantothenic Acid (Vitamin B5), an essential nutrient that helps your body break down carbs, fats, and proteins into energy, the formula becomes even more effective at supporting energy production and exercise endurance. Together, they support longer, more intense workouts so you can push harder and recover faster. For suggested use, take one tablespoon daily or as directed by a physician or licensed nutritionist, or mix it with your favorite juice or beverage. Research shows it is beneficial to consume L-Carnitine with 20-30g of carbohydrates and ideally 20-30g of protein, such as with breakfast or a pre-training meal, to facilitate proper uptake into the muscle cell. This gluten-free formula contains 0% juice, zero fillers, zero banned substances, and zero FD&C dyes, and undergoes rigorous third-party testing for purity, efficacy, and transparency.

Product Focus: Weight and Metabolism for MenAlso covers:DigestionHeart
Tier ⓘ
Tier 3 · Rank 2
Tier 3 · Reviewed. Strong review agreement, with limited or early support from human studies. Rank 2 within Tier 3 for Weight and Metabolism for Men; 7 of 23 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
73 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
92% of 1,391
Biohacker Mentions
9 of 10
Cost per month
$29

Study, Trial or Testing Result Summary

Members Only30 human studies · 16 improved

2 of these 30 human studies gave l-carnitine by drip, not by mouth.

30 human studies16 improved10 no effect83,113 people studied

This product provides L-carnitine for weight management, though the exact amount per serving is hidden in a blend. Most pooled human analyses find that L-carnitine offers a small extra reduction in weight. A 2025 review of eight pooled analyses covering 16,352 people found that taking 150 to 4,000 milligrams daily for 8 to 30 weeks lowered body weight, body mass index, and waist size [1]. Across 43 randomized trials in overweight and obese adults, supplementation reduced body weight by about 1.1 kilograms and fat mass by 1.2 kilograms, with no change in body fat percentage or waist size [2]. Another review of 37 trials with 2,292 people showed a weight loss of about 1.2 kilograms, with the strongest results near 2,000 milligrams a day [3]. In nine trials involving 911 adults, users lost about 1.3 kilograms more than controls, although this benefit shrank over time [4]. Additionally, a one-year trial of 258 obese people with uncontrolled type 2 diabetes found that adding 2 grams of L-carnitine daily to meds improved weight reduction [5]. However, a 2022 pooled analysis of 143 trials with 49,810 adults found that levocarnitine did not lower body weight compared to lifestyle changes alone [6]. Animal and cell studies are never counted.

See all 30 studies →Hide the studies

Review Totals and Summary

Members Only1,391 reviews · 92% positive
1,391 reviews · IHerb 1,109 · Walmart 111 · Vitacost / iHerb 111 · Target 60
92% positive7% neutral1% negative

This ProSupps L-Carnitine Liquid 3000, Stimulant-Free Liquid Shots, Berry has garnered significant positive attention, with approximately 1391 ratings across various stores, and an impressive 93% of reviewers awarding it 4 or 5 stars. **What it did for buyers:** Many users report experiencing a noticeable boost in energy and improved endurance during workouts. Reviewers frequently mention a "nice clean energy boost" and that it "helps with endurance during cardio and workouts." It's also praised for aiding in recovery and supporting fat metabolism, with some noting "better recovery" and "supports fat metabolism during my cuts." Some users also found it beneficial for mental clarity, stating it "clears my head and leaves me feeling ready to get things done," and for overall weight management, seeing a "big difference in my energy and weight management!" A few users also reported increased sweating during workouts, with one exclaiming "the sweat is real!!!" and positive effects on their digestive system, finding it "gentle with my digestive system." **Complaints:** While overwhelmingly positive, a few concerns were raised. One reviewer reported receiving a "product arrived opened and broken." Another significant point of feedback, particularly for female users, was that the product can cause dryness. One reviewer warned, "it makes EVERYTHING dry, so just keep that in mind!" and advised drinking plenty of water. **Taste and Form:** The taste is a major highlight for many, with the Berry flavor frequently described as "great taste" and "really good flavor." Reviewers appreciate that it "tastes clean and not overly sweet," and some even compare it to "a sour candy but just perfect." The Green Apple flavor also received praise. Its liquid form is considered convenient and easy to use, with comments like "convenient liquid shot" and "Easy to use." Users also noted it "mixes easily if needed." **Who it suits:** This liquid L-Carnitine appears well-suited for individuals seeking a stimulant-free energy boost and support for their fitness goals, particularly those focused on fat metabolism, weight management, and improving workout performance and recovery. It's popular among those who appreciate a good-tasting supplement and its easy-to-use liquid form. Long-term users are common, with some having used it for "almost 7 year its working for me." However, individuals prone to dryness, especially females, should be mindful of the potential for increased dryness and ensure adequate hydration.

Biohacker Summary

Members Only9 of 10 recommend it
9 of 10 biohackers on our panel recommend it

Most of the panel recommends or uses L-carnitine, with four recommending it, three neutral, one warning and one who stopped. The main reasons are moving fat into the cell's energy centers for fat burning and exercise, male and female fertility and sperm quality, heart health, and brain and mitochondrial energy. Many prefer the acetyl form, and doses named include 500 to 2000 milligrams a day, 1 to 4 grams a day with carbohydrates, and 1 to 3 grams a day for at least 30 days before conception, while one takes a much lower injected dose. One person takes it fasted before a workout and another pairs acetyl-L-carnitine with alpha-lipoic acid. Cautions came from one panelist who warns against injecting it because of contamination risk, and another who stopped over a heart risk marker (TMAO) and no noticeable benefit.

See all 9 biohackers →Hide the biohackers
  • Ben Greenfield · L-Carnitine · recommends
    • 19 Sep 2026 · recommends · YouTube ↗
      Recommends L-carnitine for male fertility, explaining that it helps shuttle fatty acids into mitochondria, assisting with beta-oxidation, and its concentration in sperm correlates with sperm motility.
    • 19 Sep 2026 · neutral · Podcast ↗
      He mentions L-carnitine as a supplement with real human data behind it for male fertility.
    • 8 Sep 2026 · recommends · X ↗
      Recommends L-carnitine at 1-3 grams per day for at least 30 days pre-conception to improve mitochondrial function tied to sperm quality.
    • 20 Nov 2025 · recommends · Facebook ↗
      Recommends MitoQ +Heart, a Mitoquinol-enhanced blend with L-Carnitine, Magnesium, and Vitamin D3 for cardiovascular and energy support.
    • 13 Nov 2025 · recommends · YouTube ↗
      States that acetyl L-carnitine is very important as a transport molecule that facilitates the entry of fatty acids into the mitochondrial chain, which can produce 100 ATP per molecule.
    • 25 Nov 2023 · neutral · YouTube ↗
      Mentions L-carnitine as a supplement that is "not bad" but less of a priority than creatine, protein, vitamin D, fish oil, and essential amino acids.
    • 24 Aug 2023 · recommends · YouTube ↗
      Recommends L-carnitine at 500 to 1,000 milligrams for male fertility, noting it can be found in capsules or as an intramuscular injection.
    • 10 Aug 2023 · neutral · Podcast ↗
      Ben mentions that L-carnitine ranks pretty high in a database ranking of anti-aging drugs and compounds by effectiveness.
    • 10 Aug 2023 · stopped · YouTube ↗
      States that he does not use L-carnitine, but many people in the exercise industry are reporting using it efficaciously for muscle gain as an injectable compound.
    • 20 Jul 2023 · neutral · YouTube ↗
      Mentions L-Carnitine as an ingredient that helps existing functioning mitochondria make more energy.
  • Dr. Rhonda Patrick · L-Carnitine · neutral
    • 7 Sep 2026 · neutral · YouTube ↗
      Discusses L-carnitine's role as a transporter for fatty acids into mitochondria for energy, its role in detoxifying metabolites, and its involvement in stabilizing cell membranes and ketone production. They mention studies showing it helps increase muscle mass and improve cognitive function in women, and meta-analyses showing reductions in body weight, waist size, and body fat in overweight and obese individuals.
    • 28 Apr 2022 · uses · YouTube ↗
      Takes acetyl-L-carnitine in the morning, believing it is beneficial with the ketogenic diet and can help boost ketosis, as people on a ketogenic diet can be deficient in carnitine.
    • Date not recorded · neutral · Website ↗
      L-carnitine is important for transporting fatty acids into the mitochondria for energy and plays a role in detoxifying potentially toxic metabolites. Supplementation in the range of 1 to 4 g a day along with carbohydrates has shown benefits in muscle mass, cognitive function, and reductions in body weight and waist size in overweight and/or obese individuals.
    • Date not recorded · neutral · Website ↗
      She thinks it would be useful to add acetyl-L-carnitine to her alpha-lipoic acid for mitochondrial benefits, but it's not high on her list because she eats a lot of meat, which is high in carnitine.
    • Date not recorded · neutral · Website ↗
      Dr. Rhonda Patrick reviews how L-carnitine affects mitochondrial energy metabolism.
  • Andrew Huberman · L-Carnitine · recommends
    • 27 Jul 2026 · recommends · YouTube ↗
      Andrew Huberman, based on discussions with fertility doctors, recommends L-carnitine for patients trying to increase fertility, egg quality, or sperm quality, noting it can be taken orally in higher dosages like 500 or 750 milligrams a day, or via injectable form.
    • 14 May 2026 · recommends · Podcast ↗
      He shares science-based tools for modulating aggression, including supplementation with acetyl-L-carnitine.
    • 14 May 2026 · neutral · YouTube ↗
      Discusses a study showing that acetyl-L-carnitine supplementation significantly improved symptoms of ADHD, including reductions in aggressive behavior, attentional problems, and delinquency.
    • 13 Apr 2026 · recommends · YouTube ↗
      Recommends L-carnitine for sperm health.
    • 23 Mar 2026 · uses · YouTube ↗
      Has started experimenting with L-carnitine in an injectable form, taking a much lower milligram count than oral doses, to avoid absorption issues and concerns about increased TMAO from oral intake. They acknowledge its benefits for mitochondrial health.
    • 19 Jun 2025 · neutral · Podcast ↗
      Mentions Acetyl-L-carnitine in the context of whole body pain.
    • 13 Nov 2023 · recommends · YouTube ↗
      Recommends 1 gram of L-carnitine with 1 gram of vitamin C for male patients with any abnormal sperm parameter as part of a sperm enhancement protocol.
    • 23 Jan 2023 · neutral · Podcast ↗
      Discusses L-Carnitine as a fertility supplement.
    • 23 Jan 2023 · recommends · YouTube ↗
      Recommends L-carnitine in capsule form, 1 to 3 grams per day for 30 to 60 days, to significantly improve egg quality by supporting mitochondrial function, which is vital for chromosomal organization and egg fusion.
    • 9 Jan 2023 · recommends · Podcast ↗
      Recommends L-Carnitine for hormone health.
  • Dave Asprey · L-Carnitine · recommends
    • 16 Dec 2025 · recommends · YouTube ↗
      States that L-Carnitine shows changes happening in fertility.
    • 10 Oct 2025 · neutral · YouTube ↗
      Mentions that Acetyl-L-Carnitine is usually a good mitochondrial enhancer, but not everyone needs it.
    • 5 Aug 2025 · uses · YouTube ↗
      Uses Acetyl-L-Carnitine on a regular basis as a well-known enhancer of mitochondrial fatty acid oxidation.
    • 27 Jun 2025 · uses · YouTube ↗
      Has included L-carnitine or acetyl-L-carnitine in his cognitive enhancement and longevity stack since his mid-20s, and finds its use for joints to be innovative.
    • 6 May 2025 · neutral · YouTube ↗
      Dave Asprey mentions acetyl-L-carnitine as a mitochondrial stimulator that is widely available and can be felt right away.
    • 27 Mar 2025 · neutral · YouTube ↗
      Notes that people in longevity have been taking acetyl-L-carnitine for 30 years for cognitive function and fat burning, and combining it with fatty 15 might produce PDC.
    • 2 May 2024 · recommends · YouTube ↗
      Includes Acetyl-L-Carnitine as a helpful addition to a med protocol.
    • 18 Apr 2023 · uses · YouTube ↗
      Has been on acetyl-L-carnitine most of the time since [18:46] but found that taking too much caused jaw tension, so he had to dial back on it. He notes it is a mitochondrial enhancer.
    • 15 Dec 2020 · stopped · YouTube ↗
      Used to take acetyl L-carnitine at a dose of about 500 milligrams, but stopped because it raised his acetylcholine levels too much, causing jaw tension.
    • 25 Sep 2020 · warns · YouTube ↗
      Dave found that if he takes too much acetyl-L-carnitine, he gets a headache and jaw tension, indicating he has enough in his system and it raises his acetylcholine levels more than he needs.
  • Dr. Mark Hyman · L-Carnitine · neutral
    • 25 Jun 2025 · neutral · YouTube ↗
      Mentions that supplementing with L-carnitine can make mitochondria more efficient.
    • 23 Aug 2024 · recommends · YouTube ↗
      Recommends Acetyl L-Carnitine as it is critical in fat metabolism and supports the transport of fatty acids into the mitochondria for energy.
    • 28 Feb 2024 · recommends · YouTube ↗
      Recommends L-carnitine as critical for producing sperm and increasing antioxidant status in men.
    • 29 Sep 2023 · recommends · YouTube ↗
      States that making energy in mitochondria requires carnitine and recommends acetylol carnitine or L-Carnitine at 500 to 2000 milligrams a day, usually 500 once or twice a day, as it is important in metabolizing fats.
    • 25 May 2022 · uses · YouTube ↗
      Mentions that L-carnitine was part of the mitochondrial therapy that helped a child with autism improve.
    • 22 Sep 2021 · uses · YouTube ↗
      Used L-carnitine as one of the first things with a 55-year-old woman with Graves' disease, as it can act as a thyroid peroxidase inhibitor, and she began to have relief from her symptoms.
    • 26 Jul 2021 · uses · YouTube ↗
      Used L-carnitine as one of the first interventions for a woman with Graves' disease, noting its ability to act as a thyroid peroxidase inhibitor, which provided symptom relief.
    • 8 Mar 2021 · recommends · YouTube ↗
      Dr. Hyman discusses L-carnitine as an important nutrient for metabolic flexibility, helping the body use fat and carbohydrates for energy. He notes that people with diabetes, insulin resistance, pre-diabetes, and gestational diabetes are often low in this nutrient and that good prenatal vitamins often include it.
    • Date not recorded · neutral · Website ↗
      Lists Acetyl-L-Carnitine 500mg as a product available, noting its regular price and capsule count.
    • Date not recorded · neutral · Website ↗
      Acetyl-L-Carnitine 500mg is listed for sale on Dr. Mark Hyman's website.
  • Thomas DeLauer · L-Carnitine · recommends
    • 6 Jun 2025 · recommends · YouTube ↗
      Recommends L-carnitine, especially if working out, to help shuttle fat into the cell better and improve fat oxidation, particularly in a fasted state before a workout.
    • 18 Mar 2025 · uses · YouTube ↗
      Takes L-carnitine.
    • 17 Dec 2024 · uses · YouTube ↗
      Takes supplements like Acetyl-L-Carnitine to enhance mitochondrial function.
    • 2 Dec 2024 · recommends · YouTube ↗
      Discusses the mixed opinions on L-Carnitine for fat loss but concludes that it is beneficial, citing a meta-analysis showing an average of 1.33 kg of fat lost. He suggests that many people may be more deficient than they think, especially those who exercise intensely, and that it is an inexpensive supplement worth trying.
    • 24 Jun 2024 · recommends · YouTube ↗
      Discusses the benefits of L-Carnitine for fat loss, citing a meta-analysis showing an average of 1.33 kg of fat lost, and suggests it's worth exploring as it's inexpensive and critical for fat oxidation.
    • 1 Nov 2023 · recommends · YouTube ↗
      Recommends Acetyl L-Carnitine during a fast, especially for active individuals who deplete carnitine, as it's critical for fat burning, can cross the blood-brain barrier, and may have antioxidant effects and improve brain fat utilization.
    • 19 Oct 2023 · recommends · YouTube ↗
      Discusses Acetyl L-Carnitine, noting its potential for cognitive improvement in dementia patients by stimulating mitochondrial function, acting as an antioxidant, and promoting neuronal growth and membrane stabilization.
    • 8 Jun 2023 · recommends · YouTube ↗
      Recommends 1500 milligrams (1.5 grams) of L-Carnitine to help mobilize fat, suggesting it be taken earlier in the day, possibly during a fast.
    • 11 Feb 2023 · recommends · YouTube ↗
      Recommends acetyl-L-carnitine, especially for active individuals or those fasting/low-carb, as it crosses the blood-brain barrier to provide fat-based fuel to the brain, promoting sharpness and alertness.
    • 29 Jul 2022 · uses · YouTube ↗
      Takes 2-4 grams of Acetyl-L-Carnitine, noting its importance for fat transport into mitochondria, especially for those on a ketogenic diet and athletes, and its mood-boosting effects for depression.
  • Dr. Eric Berg · L-Carnitine · neutral
    • 31 May 2024 · neutral · YouTube ↗
      Mentions L-carnitine as another nutrient that can be depleted, similar to co-enzyme Q10.
    • 24 Feb 2024 · recommends · YouTube ↗
      Explains that L-Carnitine helps burn fat during exercise, preserves muscle protein, and aids in recovery from exercise, noting it is very high in red meat.
    • 18 Mar 2020 · recommends · Podcast ↗
      States that the best way to use L-Carnitine is for cardiovascular health, as the heart needs it to transport fatty acids for energy.
    • 6 Oct 2019 · recommends · YouTube ↗
      Recommends L-carnitine for people with congestive heart failure, arrhythmia, or any type of heart damage, stating it is dynamite for the heart.
  • Peter Attia · L-Carnitine · warns
    • 3 Mar 2024 · warns · YouTube ↗
      Discusses L-carnitine, noting that people inject it for fat loss and to get more out of testosterone input, but warns against injecting it due to potential contamination from homebrewing or even compounding pharmacies, which have had issues leading to deaths.
    • 26 Feb 2024 · warns · YouTube ↗
      Warns that injecting L-carnitine, especially if home-brewed, is a bad idea due to sterilization concerns and potential for contamination, which can lead to serious health issues.
    • 26 Feb 2024 · neutral · Podcast ↗
      Derek explores L-carnitine as a fat loss supplement.
  • Siim Land · L-Carnitine · stopped
    • 12 Apr 2023 · stopped · YouTube ↗
      Stopped taking L-Carnitine because it converts to TMAO, a cardiovascular disease risk factor, and he hasn't noticed significant benefits for muscle growth or fat oxidation, preferring not to gamble with the risk given his family history of cardiovascular disease.
    • 5 Dec 2022 · uses · YouTube ↗
      States that L-Carnitine is great and can help with androgen receptor density for muscle growth, and he takes it before resistance training for this purpose, but not daily.
    • 16 Jun 2021 · uses · YouTube ↗
      Experimented with acetyl-L-carnitine to improve his performance on the soccer field, specifically his ability to read the play.
    • 11 Jul 2019 · neutral · YouTube ↗
      Mentions L-carnitine as an ingredient in Kapex that helps transport fatty acids into the mitochondria and liver.

RAL Summary

Members OnlyTier 3 for Weight and Metabolism for Men

This product is placed in Tier 3 because 92% of its 1,391 customer reviews are positive and multiple human pooled analyses show modest weight loss support, even though the exact L-carnitine dose is not disclosed on the label.

  • L-Carnitine: amount hidden in a blend

Where the evidence disagrees: 10 of the 30 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Metabolic system, Digestive system, Cardiovascular system

Combine with: To enhance the effects of L-Carnitine for weight management, consider combining it with supplements that support metabolism, energy, and muscle preservation. Creatine can improve exercise performance and muscle mass, which is beneficial for fat loss. A high-quality protein powder, such as whey protein, supports muscle repair and satiety, crucial for maintaining metabolism during a caloric deficit. Green tea extract or caffeine can provide an additional metabolic boost and energy. Alpha-lipoic acid may also be beneficial for glucose metabolism and antioxidant support.

Possible side effects: Users occasionally report dryness, temporary diarrhea when taking it on an empty stomach, and an increased heart rate during cardio exercise.

Supplement Facts

Includes 0 g Added Sugars 0 g · Pantothenic Acid 10 mg · L-Carnitine 3000 mg
Supplement Facts
Serving Size Serving Size: 1 Tablespoon (15 mL)
Servings Per Container 31
Amount Per Serving% Daily Value
Calories0
Total Carbohydrate0 g0%
Total Sugars0 g†
Includes 0 g Added Sugars0 g0%
Pantothenic Acid10 mg200%
L-Carnitine3,000 mg†
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.

Other ingredients: Other Ingredients: Filtered Water, Phosphoric Acid, Citric Acid, Malic Acid, Natural Flavors, Sucralose, Acesulfame Potassium, Potassium Sorbate (Preservative), Sodium Benzoate (Preservative).

Directions: SUGGESTED USE: Take one tablespoon (15mL) of L-Carnitine 3000 daily or as directed by a physician or licensed nutritionist. You may also mix with your favorite juice or beverage. SHAKE CONTAINER WELL BEFORE EVERY USE.

Label source: Prosupps · Report a label change

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Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.