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Additionally, a randomized, double-blind, placebo-controlled trial in 162 elderly people (70 years) with mild vitamin B 12 deficiency found that vitamin B 12 supplementation for 24 weeks, alone or in combination with folic acid, did not improve memory performance (117)

Subcutaneous injection represents the most practical administration route for self-injection

Trainer PJ, Drake WM, Katznelson L, Freda PU, Herman-Bonert V, van der Lely AJ, et al

While the chemical-based nature of ion exchange is cheaper and often times more amino acids are captured, a drawback to the ion exchange method is that you may also lose some of the other important compounds in the whey product, such as lactoferrin and many of the immunoglobulins

This drop relates to cognitive decline and several neurodegenerative conditions

Peptides, 3(6), 623626