Adult Cattle - 1 to 2 mL per 100 pounds of body weight
If a deficiency does not exist, supplementing Vitamin B12 will likely not have the same positive effect. B12 injections are available, for $15 to $50 a pop, at spas and wellness centers, but its smart to talk to your physician before you spend money on them
The recommended daily amount (RDA) varies, depending on age and other factors, but while the recommended dose for an adult is 2.4 mcg (micrograms), B12 vitamin pills are also sold in doses of 5 to 25 mcg, and even 500 mcg to 1,000 mcg or more
One trial used 2000 g/day vitamin B 12 and demonstrated a mean difference of 680 pg/mL (95% confidence interval 392.7 to 967.3) in favor of oral vitamin B 12
Comparing effectiveness: The science behind each method Now that we understand how NAD+ injections and supplements are delivered, the next question is: how well do they actually work