Effects Of Whey Supplementation Research Articles

The effect of whey supplementation on the nutritive value of fermented forage from semi-natural grassland

Cilj istraživanja bio je utvrditi utjecaj dodatka sirutke u prahu provenutoj biljnoj masi poluprirodnog travnjaka na hranidbenu vrijednost fermentirane krme i kvalitetu fermentacije u silosu. Korišteno je pet razina dodatka sirutke u prahu kg-1 silirane suhe tvari (ST) krme poluprirodnog travnjaka: (i) 0 g; (ii) 13 g; (iii) 65 g; (iv) 130 g; (v) 260 g (tretmani T0, T13, T65, T130 i T260 respektivno). Biljna je masa silirana u laboratorijskim silosima. Silosi su otvoreni 40. dan od zatvaranja radi procjene hranidbene vrijednosti fermentirane krme i kvalitete NIR spektroskopijom. Zaključeno je da sirutka u prahu, kao dodatak provenutoj biljnoj masi poluprirodnog travnjaka prilikom siliranja, linearno povećava sadržaj ST (P<0,05), korigirane ST (KST) (P<0,01), sirovih proteina (SP) (P<0,001), neutralnih detergent vlakana (NDV) (P<0,001), fermentirajuće metaboličke energije u metaboličkoj energiji (FME/ME) (P<0,001), probavljivost organske tvari u ST (D-vrijednost) (P<0,001), faktor konzumacije za goveda (P<0,001), faktor konzumacije za ovce (P<0,001), a smanjuje pH vrijednost (P<0,05), sadržaj organske tvari (OT) (P<0,001), sadržaj amonijskog dušika (NH3-N) (P<0,001) i rezidua šećera (P<0,001) u fermentiranoj krmi.

Effect of whey supplementation on circulating C-reactive protein: a meta-analysis of randomized controlled trials.

Whey supplementation is beneficial for human health, possibly by reducing the circulating C-reactive protein (CRP) level, a sensitive marker of inflammation. Thus, a meta-analysis of randomized controlled trials was conducted to evaluate their relationship. A systematic literature search was conducted in July, 2014, to identify eligible studies. Either a fixed-effects model or a random-effects model was used to calculate pooled effects. The meta-analysis results of nine trials showed a slight, but no significant, reduction of 0.42 mg/L (95% CI −0.96, 0.13) in CRP level with the supplementation of whey protein and its derivates. Relatively high heterogeneity across studies was observed. Subgroup analyses showed that whey significantly lowered CRP by 0.72 mg/L (95% CI −0.97, −0.47) among trials with a daily whey dose ≥20 g/day and by 0.67 mg/L (95% CI −1.21, −0.14) among trials with baseline CRP ≥3 mg/L. Meta-regression analysis revealed that the baseline CRP level was a potential effect modifier of whey supplementation in reducing CRP. In conclusion, our meta-analysis did not find sufficient evidence that whey and its derivates elicited a beneficial effect in reducing circulating CRP. However, they may significantly reduce CRP among participants with highly supplemental doses or increased baseline CRP levels.