|
| Animal | Dose rate | Major findings | References |
|
| Laying hens | Basal diet added FA 4 mg/kg | Increased egg weight and egg mass, decreased serum glucose levels, and serum uric acid | Jing et al. [50] |
|
| Laying hens | Basal diet added FA 10 or 100 mg/kg | Increase egg and plasma folate concentrations and also decrease the transport of FA in the duodenum | Tactacan et al. [54] |
|
| Laying hens | Basal diet added 10 mg/kg of FA | Affects the activity of plasma homocysteine, methionine synthase, and hepatic serine hydroxymethyltransferase. And egg folate concentrations | Tactacan et al. [59] |
|
| Laying hens | FA added 4 mg/kg | Enriches the FA content of eggs | Dickson et al. [45] |
|
| Laying hens | Basal diet added with chromium yeast (150 mg ton−1) + FA (10 mg ton−1) | Increase in the feed conversion, decrease in feed consumption, and egg yolk cholesterol | Eseceli et al. [60] |
|
| Laying hens | Basal diet added FA 50 mg/kg | Increase the body weight of the newly hatched chicks | Terčič and pestotnik [41] |
|
| Laying hens | Basal diet added FA 24 mg/kg | It affects the cecum by reducing pathogenic bacteria | Bai et al. [30] |
|
| Laying hens | Basal diet added FA 5, 10, and 15 mg/kg | It affects egg yolks by increasing 5-MTHF content and egg production | Bagheri et al. [27] |
|
| Laying hens | Basal diet added 4 mg/kg of crystalline FA | Affect the accumulation of folate in eggs | Hebert et al. [45] |
|
| Laying hens | Basal diet added 2 and 4 ppm FA | Increased egg production | Krishnan [43] |
|
| Laying hens | Basal diet added BET (1,0 g/kg) and FA (1,0 mg/kg) | Increases in haugh units, egg weight, shell thickness, sperm motility, and decreased dead spermatozoa | Ezzat et al. [49] |
|
| Hepatocytes from new-hatched male chicks | The concentration of FA in the culture medium is 15 mg/L | Inhibits de novo fatty acid synthesis and promotes hydrolysis and exportation of triglyceride in primary chicken hepatocytes | Liu et al. [9] |
|
| Broilers | Basal diet added 200 mg L-ascorbic acid plus 1.5 mg FA/kg | Can improve the antioxidant status, growth, and health status of broilers under heat stress | Gouda et al. [25] |
|
| Broilers | 2.0 mg/kg folate added to feed | Less significantly affect product performance and slaughter performance | Zhang et al. [12] |
|
| Broilers | FA (13.0 mg/kg), meth (0.25%), and B12 (0.15 mg/kg) were added to feed | Positive effect on FCR, egg weight, hatchability, and weight of DOC | El-Husseiny et al. [48] |
|
| Broilers | FA was added to the feed at 5 mg/kg and 10 mg/kg | Reduce fat accumulation by regulating gene expression | Zhang et al. [7] |
|
| Broilers | The basal diet was supplemented with 0.25, 1.25, 2.50, and 5.00 mg/kg−1 folate | Could regulate glucose and lipid metabolism in broilers | Wu et al. [11] |
|
| Laying quails | FA as much as 4 and 8 mg/kg added to the feed | Significantly increase FA content and egg yolk color | Sadegheymojarad et al. [21] |
|
| Turkey | Basal diet added FA 1–2 mg/kg | Increase the vitamin content in eggs, increase the weight of chicks, and their growth | Barroeta et al. [43] |
|
