IGF-1 (Insulin-like Growth Factor-1) is a polypeptide compound produced from HGH (Human Growth Hormone).

What is IGF-1 and what is it used for?

IGF-1 (Insulin-Like Growth Factor) is a hormone that is naturally produced by your body from HGH (Human Growth Hormone), which is the main hormone secreted by the pituitary gland. HGH is usually produced during sleep or during strenuous physical activity, and is almost immediately converted into IGF by the liver. Although insulin is involved in IGF-1 production, HGH is the primary precursor.

IGF-1 is a powerful growth-promoting metabolite whose production peaks during adolescence to accelerate body growth and development. As we age, the body secretes less HGH, and therefore IGF-1. By the time a person reaches 60 years of age, their body may produce only 25% of the HGH levels produced during adolescence. Scientists believe that this reduction in HGH and IGF-1 production as we age is associated with many age-related declines in the human body, such as graying hair, wrinkled skin, loss of sexual desire and function, decreased energy, increased body fat, and more.

Are there any specific precautions or additional benefits I should be aware of with NOW IGF-1?

Keep in mind that IGF-1 is a hormone product. Hormone therapy is not an exact science, and you should always consult your physician before taking a hormonal product. Hormone therapy and hormonal supplements affect different people in different ways, so caution should always be exercised. IGF-1 is not a cure-all when it comes to stunted growth or abnormal hormone production. Again, the advice of a physician is strongly urged.

On the other hand, studies of IGF-1 have indicated it is a safe and effective product when used according manufacturer’s Suggested Use. It has been used for years by bodybuilders and fitness enthusiasts, who swear by its results.

There is a lot of misinformation being circulated about IGF-1 currently. Many sources claim that IGF-1 supplementation is only effective when administered intravenously. NOW IGF-1 utilizes new liposome technology to facilitate absorption of IGF almost immediately after administration. While capsules, tablets and liquids pass through the digestive tract, which can reduce the amount of IGF-1 absorbed, lozenges and liposprays are absorbed through the mucosal lining of the throat almost immediately without loss of the active ingredient. Lozenges and liposprays cannot take the place of doctor administered hormone therapy, but they are effective if used properly according to manufacturer’s directions.

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IGF-1 Lozenges (NOW) - Average rating (1 review)  - Write a review Show Reviews Reviews (1) (0) (0) (0) (0)   3 of 3 people found the following review helpful. June 07, 2007 Reviewer: Rafael in Pennsylvania Immediate results felt with recovery after strenuous activity. Expect to make excellent gains because of the enhance recuperative powers. Was this review helpful to you? Yes  No

IGF-1 Spray (NOW) - Average rating (5 reviews)  - Write a review Show Reviews Reviews (4) (1) (0) (0) (0)   6 of 7 people found the following review helpful. April 16, 2007 Reviewer: bruce in California This product is outstanding. I've seen a noticeable increase in smoothness of my skin, eliminates nearly all acne, thickens the hair on my head, and gives me more energy. I use it twice a day with 3 pumps each time. I've been using it for about 2 years. Was this review helpful to you? Yes  No 4 of 4 people found the following review helpful. July 11, 2007 Reviewer: Rafael in Pennsylvania There was noticeable increase in overall energy, and libido. And it even tastes good. Was this review helpful to you? Yes  No 1 of 1 people found the following review helpful. April 13, 2008 Reviewer: bryan in Missouri Product works very well. Noticed a difference in strength and recovery. I always swish with fresh water to make sure that my sublingual glands are clear to absorb. Was this review helpful to you? Yes  No July 18, 2010 Reviewer: Jason in Illinois I switched to this from another GH spray...It was a great improvement. Definitely feel a pump, greater libido and over all wellness. I say try some and you may like it. Was this review helpful to you? Yes  No June 14, 2010 Reviewer: William in Texas I have been using this product for about 9 days now and I definitely have more libido and more energy in general. I probably wouldn't recommend this unless you're over 35 years of age though. Was this review helpful to you? Yes  No