Mineral retention in young men consuming soy-fiber-augmented liquid-formula diets

Abstract

The effect of a nutritionally complete liquid-formula diet without soy polysaccharide or with the fiber source at 20, 30, or 40 g/d on mineral retention in young men was examined. Addition of 20 g soy polysaccharide to the liquid formula significantly (p less than 0.05) improved the retentions of copper, iron, zinc, and magnesium over the diet without added fiber. The highest level of soy polysaccharide (40 g/d) resulted in significantly (p less than 0.05) lower Cu, Zn, Fe, and Mg retentions than did the 20-g diet and the 30-g diet had an intermediate effect. Except for slightly negative Cu (-0.1 +/- 0.4 mg) and Fe (-0.6 +/- 3.7 mg) retentions on the 40-g diet, retentions of all minerals remained positive throughout this study. The liquid-formula diet supplemented with 40 g soy polysaccharide could have a deleterious effect on mineral retentions in persons consuming the diet as their sole nutritional source.

Dietary Factors Influencing Magnesium Absorption in Humans

“…Drews et al [213] found significantly increased faecal Mg excretion in adolescent male subjects fed a basal diet containing 14 g added hemicellulose from psyllium during a 4 d crossover study. Similar results were found by Taper et al [229] in a randomized 11 d cross over study, in which healthy male subjects consumed a diet with either 0, 20, 30, or 40 g/1500 kcal soy polysaccharide rich in hemicellulose. The diet with the highest amount of fibre decreased fractional Mg absorption from 31 to 25%, however, the fibre rich diet contained also (5%) more Mg than the basal diet.…”

Systematic review and meta‐analysis: the clinical and physiological effects of fibre‐containing enteral formulae

“…In the 13 studies conducted in healthy volunteers, subjects were fed via the oral route 9, 10, 15, 34, 43–47, 56, 61, 62, 72 . In the patient studies ( n = 38), enteral nutrition was administered via various routes:…”

“…Several other end points, such as plasma glucose levels, 10, 33, 50 mineral retention 44, 71 or cholesterol levels 33, 53, 54 were reported in a small number of studies only and were therefore not considered further.…”

“…In seven studies (four conducted in healthy volunteers 44, 45, 61, 72 and three in patients 29, 66, 71 ) subjects received different amounts of fibre during different treatment phases, allowing the effect of the amount of fibre on bowel function to be studied. Considering the studies enrolling healthy volunteers, they compared: 30 and 60 g of soy polysaccharides/day, 45 20, 30 and 40 g/day of either cellulose/day 61 or soy polysaccharide 44 and low/moderate/high levels of fibre 72 . Patient‐enrolled studies compared high (14 g/L) with moderate (7 g/L) levels of soy polysaccharide 29 or administered an increase in daily fibre intake from 15 to 21 g during the final study period 66, 71 …”

Dietary Fiber Intake of Japanese Younger Generations and the Recommended Daily Allowance.

“…The addition of soy soluble fiber to the enteric nutrition fluid at a concentration of more than 40g/day TDF also caused a negative mineral balance of Fe and Cu in some cases (16,17). Increased mortalities, on the other hand, of fiber-related diseases such as ischemic heart disease ( Table 8) cannot be explained only by the decreased DF intake; they have more direct nutritional reasons such as increased fat intake.…”