Elk antler, often referred to as "velvet antler," has a long history of use in traditional Chinese medicine (TCM) and other East Asian healing systems. It is traditionally prized for its supposed ability to "tonify the kidney" and "nourish the yin and yang," concepts that loosely correspond to supporting various endocrine and reproductive functions, which can be associated with the glandular system in Western terms. Traditional practitioners have used elk antler to promote vitality, enhance growth, improve joint function, and support sexual health, all of which may be indirectly linked to glandular or hormonal balance.

However, scientific validation for these claims is limited. Some preliminary animal studies and a few small human trials with related deer antler products suggest possible effects on growth factors or certain hormones, but robust clinical evidence is lacking. There are no high-quality, large-scale human studies demonstrating that elk antler supports the glandular system (i.e., endocrine glands such as thyroid, adrenal, or pituitary) in a meaningful way. Most evidence remains anecdotal or is based on traditional use rather than rigorous science.

In summary, elk antler's use for supporting the glandular system is primarily justified by tradition, with only weak scientific evidence available. Its popularity persists largely due to historical precedent rather than established clinical efficacy.