Books on facial exercises and skincare gained popularity in the mid-20th century as beauty and self-improvement became more accessible. These guides often promised to help women achieve a more youthful and radiant appearance through simple, at-home routines. They reflected a growing interest in personal wellness and the burgeoning beauty industry. Grace Jane Treber was a proponent of these methods, and her "6-Minute Sana-Facial Exercises & Face-Care Program for Women" likely offered a concise and accessible approach to facial fitness. Such programs were designed to tone facial muscles, improve circulation, and combat the signs of aging, aligning with the beauty standards and aspirations of the era.
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