Betalain compositions and methods therefor

A method of supporting physical activity in an individual, comprising:

• administering or providing for administration a nutritional supplement comprising a dehydrated complex betalain mixture that includes a plurality of distinct betalains from a starting material, wherein the distinct betalains have a near natural composition and are present in the mixture at a total betalain concentration of at least 4 wt %;
• wherein the dehydrated complex betalain mixture further comprises a plurality of sugars, wherein a ratio of the plurality of distinct betalains to the one or more sugars is at least 0.3;
• and
• wherein the nutritional supplement is formulated for oral administration in a dosage unit that provides at least 10 mg of the mixture and is orally administered to thereby enhance the physical strength and/or endurance of the individual as measured by subjective strength and endurance metric scales to thus support the physical activity in the individual.