Source Naturals L-Arginine L-Citrulline Complex, Essential Amino Acid Supplement, Supports Peak Performance* 1,000 mg - 240 Tablets...

My husband like it works great.

As others have pointed out, the pill is huge, but I wanted to comment about a surprising reality: it's actually relatively easy to swallow. I take a chelated magnesium pill that's also oblong and smaller than this pill, but is actually much harder to swallow. The tapering of this tablet is, I think, what makes it go down easier. As for the product's performance: it's very effective. No big surprise there. Source Naturals isn't the cheapest brand but they're among the best and you get what you pay for. To conclude, I highly recommend these.

It seems to improve blood circulation, although the pills are a little large and hard to swallow

I am being treated for some issues that involve a prescription treatment, but also some highly recommended OTC supplements by the physician I see for this condition. She did NOT recommend this specific product, but in my research about the condition, it appeared this may also help along with the other things she has recommended. My results overall have been highly appreciated since I began treatment almost 8 months ago. The problem with rating this product is that I don't know which of several things is having a positive effect, and I've been unwilling to stop taking one at a time to try to eliminate any that aren't working. And it may be that it's the combination with the other supplements (and prescription treatment). Suffice it to be said that the combination of everything, including this product, is having a very positive effect on this over-70 male (enough said LOL!). And my physician approved of this product when I asked her before ordering it. She was aware of some of the research backing it, but had not had any specific experience with this product, however. Based on overall results (which I'd consider 5-star overall if reviewed), I can't single out this one product because it's part of a whole treatment regimen. But based on research on the ingredients with problems often associated with older males (not just E.D.), along with the combined results that have improved since I added this and one other supplement to my daily mix, I have to give it at least a 4-star rating. It's well worth trying if you need it but don't want to take any more prescription medications than necessary (including that "little blue pill").

I like that this is a tablet, which can be chopped and taken in any dose wanted. I started with a whole tab, for a few days, and the warmth flooded my body about an hour after, my blood flow improved (as vessels expand and nitrous oxide is created) and my blood pressure dropped. I take it at night. I also take B complex and vitamin C, as recommended. It completely takes away my restless leg syndrome. I get tired but not tipsy or light-headed. The first week or two my sleeping was improved, sleeping more soundly. Even my breathing improved, it seemed, and I had more energy. I tapered to smaller doses, now take a fraction of a pill. I am concerned about a varicose vein reopening (had radio...couple years back) so dont want to push it. Oh, and one thing I noticed, is I wake up with redder lips! As a senior woman, this is an unexpected plus I appreciate, since the aging process is the opposite! The taste is not bad, chalky. But not a chewable really. I just bite off a tiny bit, so this jar will last a long time. Since this also has citrilline, the process of converting your own nitrous oxide is more continual. I am so glad I discovered the benefits of arginine! Who knew? I think any older person, especially who has poor circulation, will see improvement. My feet are no longer cold.