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These are a completely different category

In a recent 12-week, randomized, placebo-controlled trial in untreated hypertensive subjects, daily intake of aged garlic extract (1.2 g of which contained 1.2 mg of S-allyl-L-cysteine [SAC]) was shown to significantly lower SBP by 11 mm Hg and DBP by 6 mm Hg on average in 50%-60% of participants, but reductions in blood pressure were not reported in 40%-50% of participants compared to placebo (110)

Underlying health conditions: Some health conditions, such as gastrointestinal disorders or liver disease, can affect B12 absorption and metabolism, potentially leading to shorter-lasting benefits from B12 injections

While findings are interestinglike extended lifespan and reduced tumor incidence in mice, and improvements in lipid panels and immune function in elderly patientsmost research comes from a single lab in Russia and hasnt been replicated