Adulthood spans several decades, usually divided into early adulthood, middle age, and older adulthood. During these years, physical growth stops, and the body shifts from a building phase to a maintenance and preservation phase. Basal metabolic rate naturally begins to drop by about one to two percent every decade after early adulthood. This slowdown happens largely because adults lose small amounts of active muscle mass and gain fat tissue if activity levels drop.
Total daily energy expenditure depends heavily on physical activity and basal needs. A market woman walking miles daily needs significantly more calories than an office worker sitting at a desk in a bank. Midlife also brings hormonal changes, such as menopause in women and a gradual testosterone decline in men, which further alter body composition. Midwifery practice in Nigeria often encounters adult clients whose diets remain tied to high-carbohydrate staples meant for heavy physical labor while their actual daily movement has drastically reduced. Recognizing these metabolic shifts allows midwives to guide women and their families toward realistic portion control and nutrient-dense choices rather than rigid, unsustainable dieting.
Micronutrients do not provide energy, but they regulate chemical reactions across every organ system. Iron remains critical for preventing anemia, especially among women of reproductive age who experience monthly blood loss. Calcium and vitamin D work in tandem to maintain skeletal strength and prevent adult bone thinning known as osteomalacia.
Water makes up over half of adult body weight and acts as the medium for all metabolic processes. Tropical climates in West Africa demand special attention to fluid intake. Excessive sweating from heat and physical labor increases daily water requirements far beyond the standard baseline recommendations. Midwives frequently advise pregnant and non-pregnant adult clients to drink clean water regularly throughout the day rather than waiting until the sensation of thirst sets in, because chronic mild dehydration contributes to fatigue, headaches, and urinary tract infections.
Childbearing years impose distinct metabolic demands that reshape adult nutritional needs. During pregnancy, blood volume expands significantly, raising the physiological demand for iron and folate to support fetal growth and prevent neural tube defects. Total caloric intake does not need to double—contrary to popular cultural beliefs of eating for two—but the quality of food consumed must improve markedly.
Lactation requires even more energy and fluid than pregnancy. Producing breast milk draws heavily on maternal nutrient stores. Nursing mothers need extra protein, calcium, and adequate hydration to maintain milk supply without depleting their own bones and tissues. Midwives play a vital educational role during antenatal and postnatal clinics, helping women separate helpful nutritional traditions from harmful food taboos that restrict valuable protein sources like eggs and fish during these critical life stages.
Non-communicable diseases like hypertension, type 2 diabetes, and cardiovascular conditions increasingly affect adults in both urban and rural Nigerian communities. Dietary habits formed in early and middle adulthood directly influence whether these conditions develop later in life.
Excessive salt intake stands out as a major driver of high blood pressure, while diets heavy in refined sugars and highly processed snack foods contribute to insulin resistance and obesity. Midwives encourage adults to embrace preventive eating patterns:
Clinical assessment of adult nutrition combines anthropometric measurements, dietary history, and clinical signs. Body Mass Index provides a quick screening tool to categorize clients as underweight, normal weight, overweight, or obese. Midwives also check mid-upper arm circumference where appropriate and observe physical signs like pale conjunctiva, swollen gums, or dry skin that hint at specific vitamin and mineral deficiencies.
Counseling adults requires patience and cultural sensitivity. Telling a client to stop eating their favorite traditional dishes rarely works. Instead, effective midwifery guidance focuses on practical modifications: stretching a pot of soup with more local greens, reducing the amount of palm oil added, or substituting a portion of refined garri with fiber-dense alternatives. Sustainable nutrition education respects local economic realities and empowers clients to make healthier choices within their existing household budget.