SKU: 39158448044

L-arginine - Sustained + Immediate Release, 1000mg - 120 Tablets

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Description

L-arginine - Sustained + Immediate Release, 1000mg - 120 TabletsRead more about this product What is Doctor's Best Sustained Plus Immediate Release Arginine? Doctor's Best Sustained Plus Immediate Release Arginine promotes a healthy cardiovascular system, enhances healthy circulation and supports heart function. L arginine has been shown to support the cardiovascular system, through its conversion to nitric oxide. Research suggests L arginine supplementation may also have positive benefits on athletic performance.

Read more about this product

What is Doctor's Best Sustained Plus Immediate Release Arginine?
Doctor's Best Sustained Plus Immediate Release Arginine promotes a healthy cardiovascular system, enhances healthy circulation and supports heart function. L-arginine has been shown to support the cardiovascular system, through its conversion to nitric oxide. Research suggests L-arginine supplementation may also have positive benefits on athletic performance. Two tablets of Doctor's Best Sustained Plus Immediate Release Arginine delivers 1000mg L-arginine in a bilayer tablet, with two tablets providing 500 mg of sustained release and 500 mg of immediate release L-arginine. This technology allows for enhanced blood levels of L-Arginine for a continuous period of up to 8 hours.

How does it work?
Oral L-arginine supplementation has been shown in clinical studies to support various aspects of cardiovascular health. A randomized double-blind placebo-controlled trial found that six weeks of L-arginine supplementation enhanced circulation and supported healthy heart function compared to placebo. The L-arginine effect was due to its role in NO production. Other clinical trials have shown that oral L-arginine supplementation contributes to enhanced exercise tolerance because of its ability to enhance cardiac circulation and vasodilation of blood vessels. L-arginine enrichment of the diet in healthy individuals was shown to support blood pressure already in the normal range. The overall results of these and other clinical trials showed that long-term administration of this amino acid significantly enhanced endothelial function.

Why take Sustained and Immediate Release Arginine?
The normal aging process in humans has been found to be associated with progressive changes in endothelial function (cells that line the inner surfaces of blood vessels). Research suggests that a major reason for these common changes associated with aging is reduced production or bioavailability of nitric oxide (NO) in vessels and tissues. L-arginine is a substrate for the enzyme nitric oxide synthase, required for the production of nitric oxide in the body. Nitric oxide is a substance critical for the maintenance of normal vascular function. NO mediates a number of physiological effects on the cardiovascular system, including supporting healthy endothelial function, enhancing cardiovascular health and displaying potent antioxidant properties against free radicals.



What is In

Doctor's Best
L-Arginine - Sustained + Immediate Release, 500mg - 120 tablets
Food supplement in tablet form, containing L-Arginine and minerals
Nutrition Facts
Serving Size: 2 Tablets
Servings Per Container: 60
  Amount
Per Serving
%RI*
L-Arginine (as 500 mg immediate release and 500 mg sustained release from L-Arginine alpha-Keto-Glutarate) 1000 mg

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

Ingredients: L-Arginine (as 500 mg immediate release and 500 mg sustained release from L-Arginine alpha-Keto-Glutarate)

Other ingredients: Microcrystalline cellulose, stearic acid, silicon dioxide, magnesium stearate (vegetable source), croscarmellose sodium, modified cellulose (coating).

Warnings: Non-GMO, Gluten Free, Soy Free, Vegan. Store in a cool dry place.

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SKU: 39158448044

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daveyd
Battle Creek, US
★★★★★ 5
all driven by artificial super intelligence (ASI)
Format: Hardcover
You are peering inside a black hole at a "point" beyond which you cannot see and where no one knows what exists. The point represents a period of time technologically known as Singularity. Even light cannot escape from the point and on the other side it is known only that there is a profound self replicating intelligence greater than our own, all driven by artificial super intelligence (ASI). Physicist Stephen Hawking writes that "In contrast with our intellect, computers double their performance every eighteen months. So the danger is real that they could develop intelligence and take over the world". Computer scientist and professor Vernon Vinge writes that "Within 30 years, we will have the technological means to create super human intelligence. Shortly after the human era will be ended". Our Final Invention is 267 pages of authoritative manuscript that is compelling, fascinating and beyond the fright stage. The book's author on numerous occasions refers to "we" as if there exists a unified collective engaged in artificial general intelligence(AGI) or artificial super intelligence (ASI). The reality is that some 56 nations are currently in different stages of arcane artificial intelligence designs. They include antagonists such as North Korea, Iran and suicide regimes from the Middle East. Russia, China and the U.S. are the biggest players as is Israel. The author believes that super computers fueled by nanotechnology will combine to produce ASI trillions of times more powerful than any human academic or intellectual resources. ASI has the potential to eliminate hunger, poverty, disease and even mortality but disruptions of global economies and politics will be in evidence as balance of powers are shifted. Unemployment dynamics will infect bank tellers, retail clerks, travel agents, loan officers stock brokers.... Computer software designs are so complex, even incomprehensible, that failures are inevitable. The 1986 Chernobyl meltdown, Three Mile Island, and Fukushima were all designed by highly qualified professionals but with complex infrastructures. Under Singularity as computer speeds double with frequency while human intelligence is unchanged, perhaps the musings of Hawking and Vinge will prove to be prescient. Our Final Invention is 267 pages of a very dark subject which not even a trace of a happy Betty Grable ending is to be found. My time has expired. Perhaps the final words were well expressed by Jaan Tallin, cofounder of Skype: 'A hard-hitting book about the most important topic of this century and possibly beyond---the issue of whether our species can survive. I wish it was science fiction but I know it's not'!
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Reviewed in the United States on January 23, 2016
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Jacob Donkin
Omaha, US
★★★★★ 5
Gripping and Informative, a Must-read
Format: Hardcover
As someone who struggles to finish books in their entirety, I found Our Final Invention by James Barrat highly readable, deeply informative, and utterly gripping. The book contains a powerful message: through competition, distrust, desire and curiosity, humans will inevitably create an artificial intelligence (AI) that rivals or surpasses our own. Thus, it is wise and necessary to invest now in mitigation efforts and potential safeguards -- increased research and advocacy for AI risk and, most importantly, producing friendly AI. Barrat covers a lot of ground, but his main argument is summarized as follows: Currently, we humans regularly utilize narrow AI technology (technology capable of achieving specific, programmed goals through unassisted human computing -- Siri, Google search, IBM's Watson, etc). We are also experimenting with "black box" tools and techniques (programs where inputs and outputs are understood and measurable, but the processes in between aren't -- genetic algorithms/programming and software that writes better software) and artificial neural networking (ANN), as seen through efforts to reverse engineer the human brain. And, below the surface, there is an ongoing race between world powers (driven mainly by national security, defense, and international business interests) and guided by AI developers to develop and achieve artificial general intelligence (AGI) -- human-level artificial intelligence. The problem is that once AGI is achieved it will be very difficult to manage, and may very well result in the manifestation of artificial super intelligence (ASI) -- greater than human-level intelligence. ASI could theoretically become thousands of times smarter than the smartest human being alive. It won't think like us, won't want to be ruled by us, and, most crucially, it won't want to be turned off. In fact, ASI would likely regard us as potential fuel for its quest to duplicate and improve itself exponentially in order to achieve its goals. Throughout the book, Barrat refers to interesting psychological phenomena and concepts (such as the normalcy bias), while drawing on personal experiences, historic events, and interviews with computer programmers, inventors and philosophers, to tactfully illustrate how progress in AI development is dangerously rapid. Adequate checks and balances are not in place to deal with a non-ideal intelligence explosion or hard take-off (AGI quickly leading to ASI). I highly recommend this book to anyone interested in learning about both human beings and the advancement of machines. I suspect that the prominence of AI, as a research field and topic for discussion, will only increase in time (it already has in recent years -- drones, smart technology, Wall Street high frequency trading (HFT), financial modeling), making Our Final Invention a valuable guide or stepping stone for anyone trying to understand our world and the path of the future.
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Reviewed in the United States on July 3, 2014
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Verified Purchase
Ashley Sutton
Battle Creek, US
★★★★★ 5
Great book
Format: Hardcover
We love the FGTEEV books!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
K
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Krissy Miller
Draper, US
★★★★★ 5
FGTeeV:
Format: Hardcover
The 11 yr old loves it.
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Reviewed in the United States on May 17, 2026
R
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Rebecca Leary
Los Angeles, US
★★★★★ 5
Perfect, hardback!!!
Format: Hardcover
Bought this book for my teens. They love it. Perfect hardback quality for the price. They have the whole series
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026

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