SAW PALMETTO STUDY:
Some studies show that saw palmetto is as effective in treating symptoms as finasteride (Proscar) without side effects, such as loss of libido. Other studies suggest that saw palmetto may actually shrink the size of the prostate gland. Due to the short duration (usually less than 3 months) of these studies, it is not possible to say for sure whether saw palmetto is truly effective for preventing complications of BPH. Two well-conducted studies, for example, found that saw palmetto was no better than placebo in relieving the signs and symptoms of BPH. soure: Gerber GS, Kuznetsov D, Johnson BC, Burstein JD. Randomized, double-blind, placebo-controlled trial of saw palmetto in men with lower urinary tract symptoms. Urology. 2001;58(6):960-965. ( University of Maryland Medical Center)
MURIA PUAMA STUDY:
A clinical study with 262 patients complaining of lack of sexual desire and the inability to attain or maintain an erection demonstrated Muira Puama extract to be effective in many cases. Within 2 weeks, at a daily dose of 1 to 1.5 grams of the extract, 62% of patients with loss of libido claimed that the treatment had dynamic effect while 51 percent of patients with “erection failures” felt that muira Puama was of benefit. source: UCLA School of Medicine.
HAWTHORNE BERRIES STUDY:
A study in 2009 reported that when volunteers took 900 milligrams (mg) per day of hawthorn extract for two months, it was as effective as low doses of captropril, a popular heart medication, particularly in improving symptoms of congestive heart failure.
Sixty patients were given either 180 mg extract or a placebo every day for three weeks. Those who took hawthorn showed better blood flow and oxygen supply to the heart in their ECGs, and could train for longer periods without attacks than those taking the placebo.