The Preiss-Handler pathway commences with nicotinic acid. Ordinarily, nicotinic acid is present in foods but can also be consumed via a dietary complement. This NAD+ precursor molecule can also be made by the bacterial microflora in the intestines or saliva. The C 328 utilizes a customised Variation with the tested https://www.facebook.com/pongsakclinic/posts/5494645400570047