Ashwagandha’s reputation as a sexual enhancement herb is supported by research. One animal study showed that extracts of ashwagandha increased production of sex hormones and sperm, presumably by exerting a testosterone-like effect. In another clinical trial, the herb (taken at a dose of 3 gm per day for 1 year) was given to healthy male adults 50–59 years of age. Among benefits noted: serum cholesterol levels decreased, gray hair was reduced, and a vast majority (over 70%) reported improvement in sexual performance.
It doesn’t look good for the herbs. So far, there’s no data from controlled human trials that support the erection-promoting claims for any 5 of the most frequently used herbs. The icariin in the horny goat weed can help get it up, but since you’re getting the herb rather than a purified molecule, the concentration probably isn’t high enough to have much of an effect. Worse, it turns out that Viagra is much better at blocking that erection-killing enzyme than icariin is.
In one study, men with a Vitamin D deficiency were nearly 33% more likely to have ED. But you don’t need that much sun exposure to get a healthy amount of Vitamin D. As little as 15–20 minutes a day is enough. Taking Vitamin D is a good idea, especially if you are over 65. Vitamin D can also help if you’re obese or dark-skinned (dark skin limits the amount of Vitamin D you naturally, produce)
A list of 33 medicinal plants both cultivated and wild-harvested generated show that herbal remedies are greatly utilized by men for managing sexual impotence and erectile dysfunction in western Uganda. Erectile dysfunction and sexual impotence are old problem and traditionally the indigenous knowledge had ways of treating or managing these conditions associated with male reproductive system. These plants in the tables we are discussing have been in use for centuries in treating or managing conditions in male reproductive organs.
If getting older is taking a toll on your manhood, you are not alone. About 30 million males in the U.S. frequently have problems developing or maintaining an erection, a condition commonly known as erectile dysfunction (ED). There are numerous pharmaceuticals to temporarily treat this issue (side effects included), or you could try using one of many Eastern herbs that treat ED.
Erectile Dysfunction is extremely common in men and the number one herb to treat and heal erectile dysfunction is no doubt Tongkat Ali. The herb is commonly known as Malaysian Viagra or Natural Viagra even Herbal Viagra is known to be the best natural male herb, making it extremely valuable herb to restore manhood, virility and libido plus erection. It stood the simple test, most lab evidence and experience from uses attest to its benefits vs Viagra like drugs.
"The problem with alternative treatments for any medical problem, including erectile dysfunction, is that until you have about 20 well-controlled studies over several years, you really don't know what you are working with," cautions Richard Harris, MD, a urologist at Gottlieb Memorial Hospital, part of the Loyola University Health System in Chicago.
Generally, erectile dysfunction (ED) is a neurovascular condition directly involving the endothelium of the corpora cavernosal arterial blood vessels in the penis, and is indirectly linked to cardiovascular diseases. The underlying mechanisms of ED are, however, complex and involve psychogenic, neurogenic, hormonal and vascular factors. ED occurs in aging men, with a prevalence of 52% in men 40 to 70 years of age [1-3]. Conditions that may cause ED include hypertension, diabetes, diseases of the prostate and heart, and obesity. ED may also be caused by the effects of certain medications as well as physical injury or anatomical deformity of the penis , or may result from endocrine disorders such as low testosterone, hypogonadism, adrenal insufficiency and hypothyroidism. Changes in blood flow to the male reproductive organs as a result of hardening of the arteries or atherosclerosis, hypertension and hypercholesterolemia may result in ED. It is generally accepted that there are vascular and neuropathic components to the pathophysiology of the disease, and ED has been recognized as a potential indicator of underlying cardiovascular disease. Chronic infections and/or inflammation of the prostate and irritation of the bladder may contribute to the pathogenesis of ED.
Classically the neuro-physiology of ejaculation traces the 3 Phases in which ejaculation is a complex event involving the (I) the propulsion of sperm and seminal plasma into the prostatic urethra which is accompanied by (II) bladder neck closure and (III) coordinated contractions of the bulbocavernosus and ischiocavernosus muscles, striated muscles of the pelvic floor, lower limbs and trunk. In the Asian Society of the Aging Male Study  63% have reduced erection, 68% reduced or absent ejaculation and 19% pain or discomfort at ejaculation. Disorders of ejaculation can be due to: (I) disorders of production of sperm or seminal plasma/prostatic secretions (II) disorders of propulsion. In the case of anejaculation (absence of ejaculatory) which is the ultimate disorder of ejaculation, the causes can be best classified as (I) primary or secondary. After covering psychogenic causes of ejaculation failure, the organic causes due to non-dynamic and obstructive etiologies in the prepubertal and post pubertal male will be highlighted. More details will be given on retarded ejaculation, premature ejaculation, aspermia, painful and weak (poor propulsive force) ejaculation. The evaluation of the patient must include a detailed history taken from the patient and often his partner. Aside from haematologic tests, various forms of radiological and ultrasonic imaging, neurophysiologic studies may be required. For the general practitioner the commonest scenario will be in the ED Clinic with abundant men with performance anxiety presenting with premature ejaculation. In the male aging clinic lack of arousal is the commonest cause of retarded orgasm and ejaculation but this group is plagued by decreased touch sensitivity, the need for more direct stimulation, reduced drive to orgasm, a less intense orgasm, ejaculation being weaker and of reduced quantity and disturbing complaints of a longer recovery period and less number of attainable orgasms per day or week. Thus it is not mere rumor that “by the time a man reaches 55, the refractory period to ‘do it again for a man’ increases to 12 hours or even up to a week”. In the STD clinic, painful or bloody ejaculation is frequently seen. The Condom may cause condom retarded orgasm/ejaculation.
However, you might actually be better off going one step back in the chain reaction and taking an L-citrulline supplement. While your body converts L-arginine to nitric oxide, it also metabolizes it too fast when the amino acid is taken in an oral supplement, according to a 2011 study from the University of Foggia in Italy. L-citrulline, which the body converts to L-arginine, is actually a better option to follow the same metabolic pathway and serve as a treatment for ED, the same study found.
E longifolia is a medicinal plant (family Simaroubaceae) native to Indonesia, Malaysia, Thailand, Vietnam and Laos. The root extract has been found to be the most powerful herbal aphrodisiac . Tongkat ali extracts contain many alkaloids, quassinoids, phenolic compounds, tannins, high-molecular-weight glycoproteins and mucopolysaccharides. The main bioactive compounds are eurycomaoside, eurycolactone, eurycomalactone, eurycomanone and pasakbumin-B. It is considered to be natural ‘Viagra’. It increases sexual desire, and enhances performance and general well-being [17- 19]. In addition to its aphrodisiac effect, other medicinal effects, such as antimalarial, antibacterial, antipyretic, antiulcer and antitumour effects, have been reported [20,21]. Root decoction has been used as a general tonic (18,22]. Laboratory animal studies show that root extract enhances sexual characteristics and performance in rodents [22-25]. In a study involving a boar model, it was found that E longifolia root extract-treated boars increased sperm counts and semen volume; the effect was attributed to increased level of plasma testosterone . Reports also suggest that E longifolia extract reverses the inhibitory effects of estrogen on testosterone production and spermatogenesis in rats . Oral administration of E longifolia extract to inexperienced castrated male rats produced dose-dependent increases in sexual performance . Zakaria et al  found that eurycomanone, a potential bioactive compound in the root extract of E longifolia, induced apoptosis in hepatocarcinoma (Hep G2) cells. Furthermore, their work suggested that eurycomanone was cytotoxic to Hep G2 cells and less toxic to normal Chang’s liver and WLR-68 cells. Tambi and Imran  investigated the effects of water-soluble extract of the root of E longifolia Jack and found that the extract increased semen volume, sperm concentration, percent of normal sperm morphology and sperm motility in male partners of subfertile couples with idiopathic infertility. Supplementation with E longifolia elevated the testosterone levels and upregulated osteoprotegerin gene expression in male Sprague-Dawley rats .
A study published in May 2014 in The Journal of Sexual Medicine found that some men can reverse erectile dysfunction with healthy lifestyle changes, such as exercise, weight loss, a varied diet, and good sleep. The Australian researchers also showed that even if erectile dysfunction medication is required, it's likely to be more effective if you implement these healthy lifestyle changes.