Raw Thymus Glandular Concentrate Easy to Swallow & Digest 60 Capsules All Thymus is a glandular extract of thymus, which plays a role in immune function, lymphocyte formation and antibody production. Natural Sources Raw Thymus Glandular Concentrate. Whole "raw" tissue concentrated from bovine sources specially processed (freeze-dried) at or below -5'C to preserve naturally occurring vitamins, enzymes, nucleotides, lipoproteins and all other cellular components. "Raw" tissue concentrates imported from New Zealand are made from toxin-free lyophilized glands from animals grazed on rangeland free of pesticides, growth hormones, antibiotics or chemical additives.