PQQ can be obtained through diet, with certain foods such as fermented soybeans, green tea, and spinach being good sources. However, the levels of PQQ present in these foods are typically quite low, leading many individuals to consider supplementation as a means to achieve higher doses. PQQ supplements are available in various forms, often marketed for their potential benefits to energy levels, cognitive function, and overall health.
While pentoxifylline is generally well-tolerated, it may cause certain side effects in some individuals. Common side effects may include nausea, vomiting, abdominal discomfort, dizziness, headache, and flushing. These side effects are usually mild and transient, resolving on their own as the body adjusts to the medication. However, in rare cases, more serious side effects such as allergic reactions, irregular heartbeat, and bleeding may occur, requiring immediate medical attention.