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http://www.youtube.com/watch?v=6e2ljD3hkhgA FEW FACTS ABOUT VITAMINSScientific work is daily bringing to lightmore and more facts about the, various vitaminsthat are necessary to health.One important finding that has upset previousnotions is that a given vitamin productwith a specified "unit content" may be veryeffective for one species of animal and of littleor no effect for another species. The practicaleffect of this discovery is that the unitsup to now used to measure vitamin content canno longer be considered a dependable measureof merit. Since the unit assay is made by t estsupon rats or guinea pigs, the effect on the hu-, man may be quite at variance, and has, in fact,been found as much as one thousand percentoff (in tests of Vitamin A from differentsources). That leaves the buyer of vitaminswith only one criterion by which to judge avit amin product - the reputation the producthas in producing remedial effects in the humansubject. Any good product that has beenon the"market for a number of years will havea reputation for producing results, and thatreputation naturally means more than a claimof high results in an animal assay. As SirJames Paget has so aptly stated:"Receiving thankfully all that physiologyor chemistry or any other sciencecan give us, let us still hold that that aloneis true which is proved clinically, and thatwhich is clinically proved needs no furtherevidence."Your physician is your best guide to adviseyou what vitamin product has stood the test oft ime in his experience as to results, and is yourbest source of advice as to what vitamins areof help in the treatment of various diseasedconditions.Form 3912 bIf you want to build health by adding vitaminsto your dietary regime, don't make themistake of taking heavy doses of one or twovitamins. It is just as essential that you geta "balanced ration" of vitamins as of othernutritional factors.It is important that the distinction betweena pure vitamin and a vitamin complex be madeclear. Vitamins are like other food elementsin that in Nature they are never found pure;they are found as "complexes," that is, as mixturesof chemically related substances. Thereis the same difference between pure VitaminB and Vitamin B complex as there is betweenrefined starch and whole-wheat flour. Both arecarbohydrat es. The starch may be chemicallypure, but just because it is chemically pure itis less wholesome than t he whole wheat flour.No chemist is competent enough to catalog allthe additions necessary to make the starchequivalent to the whole wheat, for the reasonthat all the co-operative nutritional factors inthe flour probably have not been identified.That is why pure or synthetic vitamins are inferiorto concentrates made from natural foodsources. They are cheaper, of course, sincesynthetic products can be put together in achemical works, whereas the natural productmust be laboriously gleaned from the food orfood by-product source, which may be somesuch material as rice bran, wheat germ, etc.All the known vitamins are now recognizedas occurring in the form of "complexes." Ithas also been found that the potency becomesless if the purification is carried too far, forsome, if not all, of the vitamins. That is significant,showing that these various factors ofthe complex co-operate with each other in producingthe vitamin effect. It also explains thedisappointing results with some of the pure orsynthetic forms.Royal Lee, Director of Research,Vitamin Products Company,Milwaukee, WisconsinPrinted in U. S. A.19 40-THE T ENTH ANNIVERSARY OF "CATALYN"Dr. Scott Perlman