What are some environmental factors that can influence that PTC taster phenotypes?

Environmental factors that can influence PTC taster phenotypes include dietary habits, particularly the consumption of certain bitter compounds found in plants, which may affect the expression of taste receptors. Additionally, geographic location and the availability of specific foods can impact the prevalence of taster or non-taster alleles in a population. Other factors, such as cultural practices and exposure to environmental toxins, may also play a role in shaping the expression of PTC tasting ability.