Chlorophyll
Chlorophyll is the substance responsible for the green color in plants that accomplishes photosynthesis.
"Good dietary sources of chlorophyll include dark green leafy vegetables, algae (including spirulina and chlorella), wheat grass, and barley grass. Supplements of chlorophyll as powder, capsules, tablets, and drinks are also available."
Fibromyalgia Constipation Halitosis (bad breath)
"Because chlorophyll is not known to be an essential nutrient, a deficiency does not exist. People who do not eat plenty of green foods lack chlorophyll in their diets."
Optimal levels remain unknown. Chlorophyll in the amount of 100 mg two or three times per day can be used to treat bad breath.
"No side effects have been reported with the use of chlorophyll. At the time of writing, there were no well-known drug interactions with chlorophyll."