Hydrate

An electrolyte involved in muscle and nerve function; sweat losses are much smaller than sodium's.

Magnesium supports muscle and nerve function and sleep; many athletes fall short of the recommended intake. Supplementing helps mainly when intake is low. Glycinate and malate forms are well absorbed and gentle on the stomach.

Supports immune function and acts as an antioxidant; moderate doses may reduce colds during heavy training, while very high doses may blunt training adaptations.

Involved in energy metabolism and making neurotransmitters; supplementing helps only if intake is low.

Needed for red blood cells and nerve function; especially relevant for vegans and vegetarians.

An electrolyte and bone mineral; sweat losses are small compared with sodium.

Zinc supports immune function and tissue repair; athletes lose some in sweat. Helpful if your diet is low in it.

A trace mineral that supports antioxidant enzymes and thyroid function; most diets provide enough.

A blend of amino acids; check it provides the essential ones at useful doses, or a protein serving does the same job.

A blend whose individual ingredient amounts aren't disclosed on the label, so the dose of each can't be checked against the research.

Sodium is the main electrolyte lost in sweat; replacing it supports fluid balance in long or hot sessions.

A source of minerals such as magnesium; the small amounts add little beyond a normal diet.

An electrolyte and bone mineral; sweat losses are small compared with sodium.

Sodium is the main electrolyte lost in sweat; replacing it supports fluid balance in long or hot sessions.

An electrolyte involved in muscle and nerve function; sweat losses are much smaller than sodium's.