Hydrocyanic acid is a very dangerous chemical.

In this chemical reaction, oxalic acid is produced.

Hyaluronic acid is very effective for skin hydration.

He suffered from oxygen deficiency while climbing the mountain.

I have hay fever, so I struggle with spring.

He is suffering from gambling addiction.

He is suffering from game addiction.

He became dehydrated from long hours of running.

My friend is troubled by alopecia.

He is suffering from depression.