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Further, if you want to ensure better absorption of B12, you can try preparations that can be absorbed under the tongue

Extensive pelvic adhesions can result in cul-de-sac obliteration, defined by Sampson (1922) as extensive adhesions in the cul-de-sac, obliterating its lower portion and uniting the cervix or the lower portion of the uterus to the rectum, with adenoma of the endometrial type invading the cervical and the uterine tissue, which compromises sperm passage and tubal function

Chronic tension patterns beginning to shift

This diversity allows entry into a wider market and caters to various consumer preferences

Although this concerns iron, I include it because the answer and the current position is relevant also to B12 deficiency