Connecticut western news., 1917-11-22
"OLEO-OIL" MARGARINE CON
 TAIN GROWTH ELEMENTS.

Much publicity has been girpn and considerable nse made by certni D interests of the recent discovery ot q liie-giving and accessory growth sub. stance in milk to which the name of "vtamine" has been give It hos heen presumed from this discovery that butter possesses nourishing and growth properties that other foods of identical cbemica composition do not.
 The claim has been refused by ex. periments and Investigations as out lined in the following article repro. duced from the March issue of the Journal of Physiological Society of January 27th:
 The Nutritive Value of Margararine and Butter Substitutes", by J O. Drummond and " D. Halliburton.
 In view of the enormous increase in the consumption of butter substi- tutes in this country, an investigation has been carried out with the object of determining whether any of these sup- stitutes can actually replace butter in the diet.
 Earlier authors concluded from their experiments that margarine is as ter, and that it could on these grounds claim to possess an equal nutritive value. Physiological view upop the problems of nutrition have been re- gently modified as a result of the dis. covery of the important and as yet un- identified, components of a normal dietary called the accessory growth substances. One of these substances is usually associated with certain animal fats, and butterfst being particularly rich in this substance, an explanation of the superior nutritive value of butterfat is afforded. Accordingly we have carried out a large number of feeding experiments upon young grcw- ing rats in order to determine whether the chief butter substitutes now upon the market contain the important so- called Fat soluble A. The experimental method employed was to feed the animal upon dietary composed of purified foodstuffs such as caseiuogen, starch, dex >rin. sugsr, salts, agar and the equally important water soluble B together with the addition of the fat to be examined. A rat fed upon such diet with lard as the only fat will grow at slow rate for 8 short time, depending upon the resistance of the animal to the unfavorable diet. and will then rapidly decline and die. The addition of a fat containing the so- called fat. soluble accessory substance in sufficient amount, and if made in time will save the life of the animal and normal growth will ensue.
 "(a) 'Oleo-oil' magazines. The better grade magazines sold in this country are usually 'oleo-oil' marga- rines. That is, they have as basal fat 'oleo-oil', a commercial product pre- pared from beef fat and consisting of the lower melting point fractions of that fat. Osborne and Mendel have found that oleo-oil contains the acces- sory substance usually found in com pany with fats and a margarine exam ined by them and probably an 'oleo- oil' margarine, was found to be equal to butterfat in the nutrition of young growing rats.
 "we can confirm the findings of these authors with regard to this class of margarine, for as far as our expert inents have gone, we have found them quite able to replace butter In satisfy ing the nutritive requirements of the young rat.
 "(b) Vegetable oil magazines. There has recently been sn enormous extension of the margarine industry to