Amino Acid Supplements: Who Needs Them and Who Does Not

Amino acids sort into three groups, and MedlinePlus is blunt about which group matters here. The essential amino acids cannot be made by the body, so they must come from food. There are nine of them, and they are named on that page.

The nonessential ones your body makes on its own, even when your food does not. A third group is called conditional. Those are usually not essential, except in times of illness and stress.

So the real question is not whether you get the nine. Any decent protein diet gives you all of them. The question is whether you eat enough protein at all. A notebook answers that. A tub does not.

The old kitchen rule said beans needed rice at the same sitting. MedlinePlus says that is no longer the advice. In its words, we no longer worry about pairing proteins at a single meal. We look at the whole day instead.

One caution survived the change. A diet based on a single plant item will not be adequate. Variety is the requirement, not timing.

MedlinePlus also lists where the amino acids come from. Animal sources such as meats, milk, fish and eggs. Plant sources such as soy, beans, legumes, nut butters and some grains including wheat germ and quinoa. And it says plainly that you do not need to eat animal products to get all the protein you need.

There is a real case for one, and it is narrow. Ease around training. An appetite that will not carry a whole meal. A day that keeps ending short. Those are timing problems, and a scoop solves timing problems well.

What it does not solve is a diet short on protein foods to start with. That gap is cheaper to close with food. The National Institute on Aging gives the two habits that find it. Eat a variety of foods each day. Keep a food diary to track what you eat.

The NIH Office of Dietary Supplements draws the last line. The FDA does not determine whether dietary supplements are effective before they are marketed. Seals from groups such as NSF International and US Pharmacopeia say a product was properly made and holds what the label says. They do not guarantee it is safe or that it works.