I think we can safely say the overwhelming answer would be (b)
Of course, it requires hard work to lose weight
Dietary deficiency: Vegans (strict vegetarians who do not eat any meat, fish, egg, or dairy products) can develop vitamin B 12 deficiency because they lack vitamin B 12 in their diets
It targets two hormones, not just one, which can help lower blood sugar and may lead to even greater weight loss
A deficiency or lack of Vitamin B12 is quite common in the over 65s, those diagnosed with pernicious anaemia, and in anyone who follows a vegan, strict vegetarian, or extreme/fad/restricted diet for a long time without taking a B12 supplement or eating fortified foods
Degraded medication may be ineffective or produce harmful byproducts