Alcohol consumption can lead to a wide range of negative health outcomes, including fetal alcohol spectrum disorders (FASDs) and hangovers. While it is not possible to completely avoid these outcomes, there are some types of alcohol that may be more harmful than others.

One type of alcohol that should be avoided is denatured alcohol. According to Drug Patent Watch [1], denatured alcohol is a type of alcohol that has been treated with chemicals to make it unfit for human consumption. This type of alcohol is often used in industrial settings and can be toxic if ingested.

In terms of preventing FASDs, the Centers for Disease Control and Prevention (CDC) [2] recommends that pregnant women avoid all types of alcohol, including beer, wine, and spirits. This is because alcohol can harm a developing fetus and lead to lifelong physical, behavioral, and intellectual disabilities.

When it comes to preventing hangovers, EatingWell [3] suggests that individuals avoid drinks that are high in congeners, which are byproducts of the fermentation process. Congeners can contribute to the severity of hangovers, so it is best to stick to clear liquors like vodka and gin, and avoid darker liquors like whiskey and rum.

In conclusion, while there are no specific types of alcohol that are universally harmful, there are certain types that should be avoided in certain situations. Denatured alcohol should never be consumed, pregnant women should avoid all types of alcohol to prevent FASDs, and individuals looking to prevent hangovers should avoid drinks that are high in congeners.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ALCOHOL
[2] https://www.cdc.gov/ncbddd/fasd/alcohol-use.html
[3] https://www.eatingwell.com/article/7954759/best-worst-alcohol-to-prevent-hangovers/