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Doctors arent overly concerned about this
The Bottom Line GHK-Cu and AHK-Cu are complementary, not competing
There are many people who dont get enough vitamin B-12-especially those with dietary restrictions, digestive problems, or high stress levels
Sprays and drops are most expensive You'll pay more for novel 'sublingual' formulations, including Solgar's vitamin B12 sublingual chewable 1000mcg 'nuggets' (17 for 100, 17p per dose, Boots) which dissolve under the tongue
Across all categories, preserved diluents consistently outperform unpreserved alternatives when reconstituted vials must be sampled over a span of two or more weeks
Following the 2015 acquisition, the brand name, NDC registrations and product lines have been uninterrupted
