What do systematic reviews say?

Oral nutritional supplements vs usual care or control

Oral nutritional supplements showed no clear difference in non‐infectious complications recorded up to 30 days postdischarge compared with usual care or control (low certainty).

• Preoperative nutrition therapy in people undergoing gastrointestinal surgery 2024 · Cochrane Headline outcomes only
  RR 0.9 [0.67, 1.2]
  5 studies · 473 participants
  Low

Oral nutritional supplements vs usual care or control

It is very uncertain whether oral nutritional supplements changes infectious complications recorded up to 30 days postdischarge compared with usual care or control (very low certainty).

• Preoperative nutrition therapy in people undergoing gastrointestinal surgery 2024 · Cochrane Headline outcomes only
  RR 0.88 [0.6, 1.27]
  5 studies · 473 participants
  Very low

Oral nutritional supplements vs usual care or control

• Preoperative nutrition therapy in people undergoing gastrointestinal surgery 2024 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 299 participants
  Low

Oral nutritional supplements vs usual care or control

• Preoperative nutrition therapy in people undergoing gastrointestinal surgery 2024 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 373 participants
  GRADE not reported

Oral nutritional supplements vs multivitamin and mineral supplement

Oral nutritional supplements showed no clear difference in complications compared with multivitamin and mineral supplement (low certainty).

• Perioperative nutrition for the treatment of bladder cancer by radical cystectomy 2019 · Cochrane Headline outcomes only
  RR 0.73 [0.47, 1.13]
  1 study · 61 participants
  Low

Oral nutritional supplements vs multivitamin and mineral supplement

• Perioperative nutrition for the treatment of bladder cancer by radical cystectomy 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 61 participants
  Low

Oral nutritional supplements vs multivitamin and mineral supplement

Oral nutritional supplements showed no clear difference in mortality compared with multivitamin and mineral supplement (low certainty).

• Perioperative nutrition for the treatment of bladder cancer by radical cystectomy 2019 · Cochrane Headline outcomes only
  RR 0.97 [0.06, 14.78]
  1 study · 61 participants
  Low

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 125 participants
  Moderate

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 109 participants
  High

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 109 participants
  High

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 109 participants
  High

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 53 participants
  High

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 53 participants
  High

Oral protein calorie supplements vs no intervention, placebo or additional nutritional advice compared to placebo

• Oral protein calorie supplementation for children with chronic disease 2015 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 70 participants
  High

Dietary advice plus supplements vs no dietary advice plus no supplements

Dietary advice plus supplements showed no clear difference in mortality compared with no dietary advice plus no supplements (low certainty).

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  RR 0.91 [0.55, 1.52]
  7 studies · 797 participants
  Low

Dietary advice plus supplements vs no dietary advice plus no supplements

The review found no eligible studies for this question.

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Dietary advice plus supplements vs no dietary advice plus no supplements

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 258 participants
  Low

Dietary advice plus supplements vs no dietary advice plus no supplements

Dietary advice plus supplements may leads to lower complications compared with no dietary advice plus no supplements (low certainty).

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  RR 0.42 [0.2, 0.89]
  1 study · 50 participants
  Low

Dietary advice plus supplements vs no dietary advice plus no supplements

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  no estimate extracted
  8 studies · 620 participants
  Low

Dietary advice plus supplements vs no dietary advice plus no supplements

• Dietary advice with or without oral nutritional supplements for disease‐related malnutrition in adults 2021 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 130 participants
  Very low