Yes, most fruits are acidic and of cause vinegar is an acid.
Hydrochloric Acid. This is the acid in your stomach that helps you digest your food.
Food acids such as citric acid or acetic acid are added to food and drink for several reasons. They can enhance flavor, act as preservatives by inhibiting bacterial growth, and help with food preservation by balancing pH levels or preventing enzymatic browning. Additionally, food acids can improve the texture of some foods by interacting with proteins.
Not really, no.
The small intestine. The mouth mashes food with the teeth and mixes it with saliva which also includes some acid compounds.
citric acid is a great food preservitve, get some lemon juice or somethin
Phosphoric acid can be found in soft drinks (e.g. Coca-Cola), food (e.g. jellies, preserves), animal food (e.g. cat food), some cleaning agents
Propionic acid is a carboxylic acid with the chemical formula CH3CH2COOH. It is a naturally occurring organic acid found in some foods and used as a preservative in the food industry.
Food acid is a very generic term. Some foods have so much acid (tomatoes) that you need to only add 3-4 Tablespoons to each pint of tomatoes to process them in a hot water bath canner.
The small intestine. The mouth mashes food with the teeth and mixes it with saliva which also includes some acid compounds.
It is contained in some foods.... But is it safe for human intake?
Some cysteine food sources that can help boost your intake of this essential amino acid include poultry, eggs, dairy products, oats, and legumes.
It uses very strong acid called stomach acid to break it down