I looks like it's does raise blood pressure, possibly blood sugars from the beta-sisterols.
Saw palmetto may affect blood pressure. Caution is advised in people taking herbs or supplements that affect blood pressure.
Saw Palmetto
http://www.mayoclinic.org/drugs-suppleme...B-20059958
Saw palmetto with other herbs that can slow blood clotting might increase the risk of bleeding in some people. These other herbs include angelica, clove, danshen, garlic, ginger, ginkgo, Panax ginseng, red clover, turmeric, vitamin E, willow, and others.
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Saw palmetto seems to decrease estrogen levels in the body. Taking saw palmetto along with estrogen pills might decrease the effectiveness of estrogen pills.
Some estrogen pills include conjugated equine estrogens (Premarin), ethinyl estradiol, estradiol, and others.
http://www.nlm.nih.gov/medlineplus/drugi...l/971.html
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Saw palmetto
http://en.m.wikipedia.org/wiki/Saw_palmetto_extract
I like the part about a study from 1898 (yes 1898)
King's American Dispensatory (1898) says of the extract:
It is also an expectorant, and controls irritation of mucous tissues. It has proved useful in irritative cough, chronic bronchial coughs, whooping-cough, laryngitis, acute and chronic, acute catarrh, asthma, tubercular laryngitis, and in the cough of phthisis pulmonalis. Upon the digestive organs it acts kindly, improving the appetite, digestion, and assimilation. However, its most pronounced effects appear to be those exerted upon the urino-genital tracts of both male and female, and upon all the organs concerned in reproduction. It is said to enlarge wasted organs, as the breasts, ovaries, and testicles, while the paradoxical claim is also made that it reduces hypertrophy of the prostate. Possibly this may be explained by claiming that it tends toward the production of a normal condition, reducing parts when unhealthily enlarged, and increasing them when atrophied.[4]