Citric acid is not harmful in most cases, you can find it in many fruits e.g. Oranges, lemons and limes.
stomach acid smells bad also.
No!! and even the ones that are, too much of them can still harm you. Sulfuric acid is very dangerous
We have to take essential amino acids from dietary sources, as our body cannot make them. But, our body can make non-essential amino acids from the essential ones. Therefore, food sources for non-essential amino acids are non-essential.
There is no difference between saturated fatty acids and saturated fatty acids. If you meant saturated fatty acids and UNsaturated fatty acids, then the unsaturated ones are the ones with double (or, theoretically, triple) bonds in the carbon chain.
Dangerous ones
Buffer systems. They convert strong acids or bases into weak acids or bases.
There are 22 standard amino acids of which 9 are essential amino acids. The essential ones are the ones our bodies cannot produce and so need to get them from food.
Regular ones not CO2 ones
Depends. Strong acids have more H+ and less OH- ions than weak ones.
The giant ones with fangs
There are many dangerous animals that can harm a human. The most obvious ones are the larger ones such as lions and tigers. However, smaller animals such as stray dogs can also be dangerous.
Volts alone is not dangerous, but volts does causes amps. Amps can be dangerous to you if it flows through your body. That's because your brain, your nerves, and your muscles ... including your heart ... all operate on tiny natural volts and amps. They can all go haywire when big ones get in from outside your body.
The main ones are proteins and nucleic acids.