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But generally, most people can see results in as early as 2 weeks

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Its up to the chemical companies making these things to figure out quality control

Vitamin B12 tablets (known as cyanocobalamin ) are also available and can be bought over the counter from pharmacies or health stores, but are not as effective as the injection for absorption

They might be worth trying in collaboration with a nutrition or healthcare practitioner

Step 4: Maintenance and cycling (ongoing) After your initial 6-8 week cycle, take 2-4 weeks off completely