Evening Primrose oil or gamma linolenic acid has been used for years as a relief of the symptoms of PMS and menstrual issues. Primrose oil relieves hormonal fluctuations, hot flashes and aids in the reduction of mood swings. Again, this is a supplement that takes a bit of time to get into your system and patience is suggested.
Ginseng is used to alleviate hot flashes. Dosages are determined according to body weight. Ginseng is considered an adaptogen, bringing imbalanced bodies and their chemistry into balance. It aids in building resistances to stress, chemical changes and input. Ginseng tends to react according to the body, its physical health, muscle health and so on. Studies show a tendency for ginseng to help reduce skin temperature. Ginseng has also been shown to help with sleep and sleep interruptions such as night sweats — hot flashes that happen to women through the night.
Black Cohosh is an herbal supplement considered to help with the intensity of hot flashes, although various studies show an unremarkable result; there are as many showing little or no result as showing an improvement. Women report success with black cohosh, but many times this is a grouping of supplements taken together, the results somewhat muddied. Black cohosh has a long history of being one of those "women's" herbs, used in situations of female issues; period discomfort, menopause and miscarriage. Caution should be used with black cohosh. It can cause stomach and digestive problems in some people.
When considering the use of supplements and herbs, research each and know what you are taking. Check with your doctor before starting supplements for hot flashes.