Review Article
Folic Acid: Sources, Chemistry, Absorption, Metabolism, Beneficial Effects on Poultry Performance and Health
Table 1
NRC recommended levels of folic acid in different poultry diets.
| Type of poultry | Age | Folic acid requirement (mg/kg) |
| White leghorn | 0–6 Weeks | 0.55 | 6–12 Weeks | 0.25 | 12–18 Weeks | 0.25 | 18 Weeks to the first egg | 0.25 |
| Brown leghorn | 0–6 Weeks | 0.52 | 6–12 Weeks | 0.23 | 12–18 Weeks | 0.23 | 18 Weeks to the first egg | 0.23 |
| Broiler strain | 0–28 Days | 0.30 | New Hampshire | 0.33–1.45 Days | 0–35 | Rhode Island red | 1–21 Days | ≤0.3 | White Plymouth | 1–28 Days | ≤0.3 | Arbor Acres | 1–20 Days | 0.3–0.45 | Bronze | 0–6 Days | 0.8 | Females bronze | 32–48 Days | 0.7 | Jersey buff | 0–3 Days | 2.0 | Females large white | 32–48 Days | 1.23 |
| Turkeys males/females | 0–4 Weeks | 1.0 | 4–8 Weeks | 1.0 | 8–12/8–11 Weeks | 0.8 | 12–16/11–14 Weeks | 0.8 | 16–20/14–17 Weeks | 0.7 | 20–24/17–20 Weeks | 0.7 |
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