Combining a high DHA multi-nutrient supplement with aerobic exercise: Protocol for a randomised controlled study assessing mobility and cognitive function in older women.

•This is the first study to look at the combination of a high DHA multi-nutrient supplement and exercise on both mobility and cognitive outcome measures in the older adult.•This will be the first intervention study to look at the effects of a high DHA multi-nutrient supplement on dual task gait performance in older adults.•The high DHA supplement contains a unique blend of nutrients that may provide synergistic benefits.