Strong evidence supports the effectiveness of nutrition interventions and counseling provided by a nutrition professional (registered dietitian nutritionist or equivalent) when part of a health care team. Compelling evidence from 36 studies supports the multi-disciplinary team approach (including a nutrition professional) to improve weight (-0.3kg to -25.9kg), BMI (-0.5kg/m² to -14.6kg/m²), waist circumference (-1.0cm to -23.5cm), hip circumference (-2.8cm), fasting blood glucose (-1.6mg to -22mg per dL), HbA1c (-0.15% to -6%), fasting insulin (-3.7mcU to -7.7mcU per L), homeostatic model assessment-estimated insulin resistance (HOMA-IR; -1.0 units to -4.0 units), LDL-cholesterol (-6.0mg to -10mg per dL) and HDL-cholesterol (+2.0mg per dL) on a variety of health conditions (i.e., management of weight, eating disorders, diabetes, renal disease, amyotrophic lateral sclerosis (ALS), cardiovascular disease, osteoporosis).

• Grade I means there is Good/Strong evidence supporting the statement;
• Grade II is Fair;
• Grade III is Limited/Weak;
• Grade IV is Expert Opinion Only;
• Grade V is Not Assignable.
• High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
• Moderate (B) means we are moderately confident in the effect estimate;
• Low (C) means our confidence in the effect estimate is limited;
• Very Low (D) means we have very little confidence in the effect estimate.
• Ungraded means a grade is not assignable.