Creatine [+]

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

Vitamin D supports bone, muscle and immune health; deficiency is common in athletes who train indoors or live far from the equator.

A B vitamin involved in turning food into energy; supplementing helps only if your diet is short on it.

A B vitamin involved in turning food into energy; supplementing helps only if your diet is short on it.

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

A B vitamin involved in turning food into energy; supplementing helps only if your diet is short on it.

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

A B vitamin involved in turning food into energy; supplementing helps only if your diet is short on it.

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.

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.

The most researched sports supplement: 3–5g a day raises muscle creatine stores, improving repeated high-intensity efforts, strength training and recovery. Creapure® is a well-known high-purity creatine monohydrate.

A mix of electrolytes such as sodium, potassium and magnesium; sodium is the one lost in the largest amounts in sweat.