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The effectiveness of testosterone boosters varies depending on the person taking it, and according to Healthline, more intensive studies need to be done before a conclusion can be drawn. How well a supplement works is dependent on if the person taking it already has deficient testosterone levels.


Testosterone boosters can cause enlargement of the breasts, hypertension, retention of blood ions, enlargement of the prostate and increased cholesterol levels, according to Drugs.com. Other side effects include gum or mouth irritation, lower back pain and moodiness.


Some of the negative effects of using the Internet include potential theft of personal information, social isolation, age-inappropriate content, spamming, and the spread of viruses and malware. The Internet has also led to lack of creativity and violation of copyrights.


Some negative effects of alcohol include a less productive professional life, broken homes, health complications and financial problems. Drinking small amounts of alcohol may have little or no negative effect. However, too much drinking inevitably leads to problems, notes the National Institute on A


Nationalism is sometimes used to get a population to support wars or other dangerous actions. It can also cause citizens to disengage from rational thought. Many wars and atrocities were committed by people acting on behalf of a nationalist leader.


Negative effects of technology include dependency and the lowered value of human workers in industrialized societies. Other critics note that technology has a negative effect on memorization and spelling skills. Voice-recognition software may eventually eliminate such crucial skills as typing, and h


Anabolic steroids can cause a number of side effects in men, such as reduced sperm counts, decreased testicle size, infertility, enlarged breasts and male-pattern baldness, according to WebMD. In women, they can produce more body hair, toughen skin, shrink breasts and expand the clitoris. Anabolic s


Industrialization negatively affects the environment as well as health. In addition to pollutants released into the environment, industrialization also causes negative effects health by promoting a primarily indoor lifestyle. Studies have linked a lack of outdoor exposure to increased stress, obesit


According to the National Institute on Media and the Family, video games can have a number of negative effects, including increases in violent behavior, desensitization to violence, social isolation and decreases in physical activity. Although not all games lead to these negative effects, many games


According to the Open Access Journal of Sports Medicine, the negative impacts of sports on children are extensive. Children face increased risks of physical injury and psychological stress that they are not mature enough to handle.