The speaker recommends Athletic Greens as it is a nutrient-dense and comprehensive formula consisting of approximately 75 vitamins, minerals, whole foods sourced ingredients, probiotics, prebiotics, digestive enzymes, and adaptogens that helps to ensure nutritional balance in the absence of whole foods while traveling. The audience can avail of a special offer from Athletic Greens, which includes a free vitamin D supplement and five travel packs on their first subscription purchase.