Only two essential<unk> <unk> s are known to be essential for humans: alpha-linolenic<unk>  (an omega-3<unk> <unk>  and linoleic<unk>  (an omega-6<unk> <unk> . The biological effects of the ω-3 and ω-6<unk> <unk> s are mediated by their mutual interactions. Closely related, these<unk> <unk> s act as competing substrates for the same enzymes. The biological effects of the ω-3 and ω-6<unk> <unk> s are largely mediated by essential<unk> <unk>  interactions. The proportion of omega-3 to omega-6<unk> <unk> s in a diet may have metabolic consequences. Unlike omega-3<unk> <unk> s and omega-6<unk> <unk> s, omega-9<unk> <unk> s are not classed as essential<unk> <unk> s because they can be created by the human body from monounsaturated and saturated<unk> <unk> s, and are therefore not essential in the diet.
Fatty acid ratio in food
Blood alcohol content
Phenolic content in tea
Overall nutritional quality index
Classification of obesity
Dietary energy supply
Selenium in biology
Liver span