What do systematic reviews say?

Foods fortified with zinc alone vs same foods without adding zinc

• Fortification of staple foods with zinc for improving zinc status and other health outcomes in the general population 2016 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 158 participants
  Low

Foods fortified with zinc plus other micronutrients vs foods fortified with other micronutrients without zinc

It is very uncertain whether foods fortified with zinc plus other micronutrients changes zinc deficiency (as defined by authors, depending on age and gender) compared with foods fortified with other micronutrients without zinc (very low certainty).

• Fortification of staple foods with zinc for improving zinc status and other health outcomes in the general population 2016 · Cochrane Headline outcomes only
  RR 0.17 [0.01, 3.94]
  1 study · 30 participants
  Very low

Foods fortified with zinc plus other micronutrients vs foods fortified with other micronutrients without zinc

• Fortification of staple foods with zinc for improving zinc status and other health outcomes in the general population 2016 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 250 participants
  Low

Foods fortified with zinc alone vs same foods without adding zinc

Foods fortified with zinc alone showed no clear difference in stunting (author defined) compared with same foods without adding zinc (low certainty).

• Fortification of staple foods with zinc for improving zinc status and other health outcomes in the general population 2016 · Cochrane Headline outcomes only
  RR 0.88 [0.36, 2.13]
  2 studies · 397 participants
  Low

Foods fortified with zinc alone vs same foods without adding zinc

Foods fortified with zinc alone showed no clear difference in underweight (author defined) compared with same foods without adding zinc (low certainty).

• Fortification of staple foods with zinc for improving zinc status and other health outcomes in the general population 2016 · Cochrane Headline outcomes only
  RR 3.1 [0.52, 18.38]
  2 studies · 397 participants
  Low

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Zinc supplementation in pregnant women showed no clear difference in length (cm) at birth compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

• Nutritional interventions for preventing stunting in children (birth to 59 months) living in urban slums in low‐ and… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 1337 participants
  Moderate

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

• Nutritional interventions for preventing stunting in children (birth to 59 months) living in urban slums in low‐ and… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 237 participants
  Low

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Zinc supplementation in pregnant women showed no clear difference in low birth weight (g) compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

• Nutritional interventions for preventing stunting in children (birth to 59 months) living in urban slums in low‐ and… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 1367 participants
  Moderate