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Is the Thymus Gland Active in Adults? Separating Fact from Decades of Assumption

For over a century, the medical community believed the thymus gland withered into a useless remnant by adulthood, a process known as involution. Yet, emerging scientific evidence is forcing a radical reassessment, directly challenging the assumption that the gland is completely inert. This shift in understanding prompts a critical question for healthy aging: **is the thymus gland active in adults?** The answer, it turns out, is a definitive yes, though its activity differs significantly from its role in youth.