If you are on medication for hypothyroidism, please check with your doctor before taking any L Carnitine. I started feeling very strange within days of taking this. After some research I found out this interferes with Synthroid. I use Amazon's reviews, so thought I'd post this in case anyone out there was thinking of taking this for the fatigue that often accompanies Hypothyroidism. Good luck on your health journey! Read more

I think this supplement has been really important towards my feeling better. I had unexplained twitching and neurological issues. Read more

I have narcolepsy. A 2013 study from the University of Tokyo suggests that narcoleptics suffer from low serum carnitine levels, so after reading about it I decided to give l-carnitine supplements a try. I can't over emphasize what a dramatic difference this product has made for me, particularly when it comes to improving my mental acuity. I've been taking this particular formula by Jarrow, twice a day, and I almost feel like my narcolepsy has become a non-issue! I still have to take a 15 min nap in the afternoon, but short of that the constant intrusion of mental decline that accompanied the vacillations of sleepiness during the day has disappeared. I actually feel like a normal human being. This formula by Jarrow is the only l-carnitine product I have ever tried, so I can't really speak to how this formula compares to some other l-carnitine products. What I can say is that I feel no reason to try another product, this one works so incredibly well. I don't write a lot of reviews, but I felt I had some responsibility to my fellow narcoleptics out there who might stumble across this. It has been amazing for me. Read more

After doing my research, I learned this is one of the best natural supplements for people who have an over-active thyroid (hyperthyroidism) or thyroid nodules. It can actually prevent a dangerous thyroid storm. I am trying to cut back on my anti-thyroid meds -- which can damage the liver -- so I have been incorporating this supplement into my daily regime. It's really a quality supplement and is helping to lower my thyroid-induced anxiety, palpitations, and other symptoms. It's not a cure, but it helps manage symptoms and there's plenty of science to support it. Great product! Read more

I have been a vegetarian for several decades, while trying to make certain I get a balanced diet. I just can't eat critters! I also have Lyme disease, and it is Marty Ross, M.D., a Lyme specialist, who recommends that vegetarians make certain to supplement Acetyl L-Carnitine. It is next to impossible to get enough if one does not eat meat. Ever since adding this to my supplement repertoire, I have felt much stronger physiologically Many thanks Dr. Ross - I need all the help I can get. Read more

I use this in conjunction with a CoQ10 supplement. The Acetyl form of L-Carnitine is used to help protect the brain and improve memory function. I also take another form of L-Carnitine, either L-Carnitine fumarate or Ester L-Carnitine, to help protect the heart. No side effects to taking both daily. If you are taking a Statin drug for cholesterol management, than taking CoQ10 with L-Carnitine is highly recommended. Read more

I've been taking this amino acid for about 8 years. It help for new synapses in your brain, and it improves my scores on Sudoku and other games. I recommend it to friends. Read more

I've been taking Acetyl L Carnitine (Now Foods brand) for a while but recently ran out. This one seemed like a good deal and I've always trusted Jarrow brand for some reason. I bought it because I wanted one that was 250mg. I took half a 250mg capsule - to be safe - when trying something new. I then noticed in the bathroom mirror that I had a red blotchy rash all over my face. It is still not gone many hours later. I'm feeling an uneasy, almost anxious type of energy - it feels like a bit of heart racing. I am drinking lots of water and hope it all subsides soon. I am returning this product. Read more

This is a poor quality acetyl l carnitine. On the preview labels it has a Biosint trademark but when I received my order there was no such trademark or "pharmaceutical grade" on the label. I contacted Jarrows about this and I was told that the contract with Biosint had expired, so the labels are very misleading (Amazon needs to remove these labels ASAP). If I had known this before I would not of purchased this product. I have tried different carnitine products over the years so I know what it should feel like, once again, this is a poor quality product don't buy and save your money. I have stopped taking the capsules with about 100 left in the container, so my only choice is to throw them in the rubbish bin, I wish I could get my money back but I cant of course.Im not sure when the contract with Biosint expired but if you are out shopping and see one of the older/previous Jarrows acetyl l carnitine with the Biosint/Sigma-Tau trademark on the label then this would be a much better choice. Hope this helps. Read more

I like this brand. Read more

Buen producto Read more

Way too overpriced beyond its actual price in dollar Read more

great! Read more