The side effects of P6 Extreme can include hair loss, skin issues like acne, increased levels of estrogen and unusual feelings of aggression and irritability. In women, the side effects may also include facial hair growth. Serious side effects include rapid heartbeat, blurred vision and dizziness. Muscle and Body Magazine warns that if a person experiences serious side effects, he should stop taking P6 Extreme and seek medical attention.
P6 Extreme is a muscle building supplement featuring a proprietary formula of nutrients, sheep's placenta powder and human chorionic gonadotropin (HCG). Together, these ingredients increase a body's testosterone production and optimize the effects of weight lifting.
According to the manufacturer, people who want an additional testosterone burst should take this supplement for eight weeks, and then discontinue use for four weeks before repeating the cycle. While using the supplement, they need to engage in muscle building activities to increase its intended effects.
The supplement also contains D-serine, a derivative of natural amino acids, and the positive side effects of this particular ingredient include elevated energy and improved cognitive focus, according to Examine.com. Based on a 2,000 calorie diet, this supplement provides 100 percent of a person's vitamin B6 and copper needs, 200 percent of daily zinc requirements and 833 percent of vitamin D requirements.