Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism.

Eurycoma longifolia Jack in managing idiopathic male infertility.

Tongkat Ali Raises Testosterone Levels in Men Over Fifties

Effect of vitamin D supplementation on testosterone levels in men.

Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion.

Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects

A double-blind crossover study evaluating the efficacy of korean red ginseng in patients with erectile dysfunction: a preliminary report.

Red ginseng for treating erectile dysfunction: a systematic review.

Effects of tissue-cultured mountain ginseng (Panax ginseng CA Meyer) extract on male patients with erectile dysfunction.

Clinical trial of Butea superba, an alternative herbal treatment for erectile dysfunction.

Red blood cell magnesium and chronic fatigue syndrome.

Efficacy of oral magnesium administration on decreased exercise tolerance in a state of chronic sleep deprivation.

A double-blind randomized placebo cross-over controlled trial using the antioxidant vitamin E to treat reactive oxygen species associated male infertility.

The effect of antioxidant treatment on human spermatozoa and fertilization rate in an in vitro fertilization program.

Lipid peroxidation and human sperm motility: protective role of vitamin E.

Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men.

Lepidium meyenii (Maca) improved semen parameters in adult men.

Clinical study of SS-cream in patients with lifelong premature ejaculation.

Effects of Korean red ginseng on sexual arousal in menopausal women: placebo-controlled, double-blind crossover clinical study.

A double-blind placebo-controlled study of ArginMax, a nutritional supplement for enhancement of female sexual function.

The enhancement of female sexual function with ArginMax, a nutritional supplement, among women differing in menopausal status.

Pharmaton capsules in the treatment of functional fatigue: A double-blind study versus placebo evaluated by a new methodology 3C49::AID-PTR772%3E3.0.CO;2-M/abstract

Vitamin D and fertility: a systematic review.

Vitamin D in human reproduction: a narrative review.

Association of hypogonadism with vitamin D status: the European Male Ageing Study.