Injections and IV drips carry higher cost and risk and must be given by medical professionals
Common signs of B12 deficiency include fatigue, weakness, pale skin, shortness of breath, numbness or tingling in the hands and feet, difficulty maintaining balance, and cognitive issues like memory problems
This is most relevant when vitamin B12 deficiency is being corrected and broader B-vitamin support is clinically appropriate, where symptoms include a combination of fatigue, neurological features, and stress, or where rapid repletion and functional support are desired
A 2019 safety review examined 87 human studies on natural astaxanthin including 35 using doses of 12mg per day or higher and found no significant safety concerns or consistent adverse effects.11 Across those trials, approved or studied doses commonly ranged between 2mg and 24mg per day, and higher short-term doses (up to 40mg per day for several weeks) have also shown good tolerability in adults, with no serious events reported