Lactic acid occurs naturally in some food. Natural fermentation creates lactic acid in in cheese, soy sauce, sourdough, meat products, and pickled vegetables. Lactic acid is also used as a pH regulator or a preservative.
Gary Gates, an LGBT demographer at the University of California Los Angeles School of Lawâs Williams Institute, came up with the most frequently cited (yet greatly limited) estimates of the countryâs transgender population: 700,000, or about 0.3 percent of adults.The figure comes from two surveys.
The answer is uncertain. It is estimated that there are about 700,000 transgender people in the US, but that estimate involves a lot of guesswork. See Why We Don't Know The Size Of The Transgender Population.