You can really kick back at this midlife phase by….. Your age of entering menopause can be influenced by various circumstances: such as, geographical location, race / ethnicity, body mass index or body weight distribution, physical activity and what you eat. Weight gain and wight distribution are huge concerns for women during midlife; ages 45 to 55 years young. Which vitamins are most important at this time? Which foods are most important at this time? Be encouraged; you can make positive changes.