The main difference is that the Vitaminhealth supplements are produced in the Netherlands and Europe, which keeps costs lower, allowing them to be sold at a more affordable price. The Solgar supplements come from America and are distributed through a company in Amsterdam. Both the transportation and this company (with a warehouse and many employees) contribute to a higher price.

The dosage and form of the B12 are the same. Therefore, there is no difference in absorption and effectiveness.

As a vegan, you don't necessarily need to take 1000 mcg per day. Those who eat a varied diet typically receive about 30 to 80 mcg of B12 daily through dairy, eggs, and meat. If no deficiency has been established, you can take a maintenance dosage of around 50 to 250 mcg per day, which is the amount found in many multivitamins. As a vegan, it may actually be better to use a multivitamin rather than a 1000 mcg B12 tablet, as you may also be lacking in several other vitamins and minerals. The ideal option in this regard is the Vegan Multi, which has been specially formulated to address these deficiencies. The Vegan Multi provides a daily dosage of 250 mcg B12 as methylcobalamin with 2 capsules, along with higher doses of vitamin D3 (from lichen) and well-absorbed iron.

Once a child is able to chew properly, this supplement can be administered. The dosage is tailored for an adult weighing approximately 60 kilos. You can adjust the dosage for your child accordingly. From the age of 12, a full adult dosage can be given, and for those under 12, the tablets can be broken into halves or quarters. Alternatively, you can give your child a whole tablet every few days, as vitamin B12 can be stored in the body and does not necessarily need to be taken daily.

Solgar Netherlands distributes only the packaging of 30 tablets of this easily absorbable methylcobalamin variant, priced at 18.95.

Relatively few people need to use such a high dosage for an extended period. One or two months of a dosage of 1000 mcg B12 in the form of methylcobalamin should be sufficient to address a diagnosed deficiency. After that, one can rely on the supplementation provided by a good multivitamin.

Delivery time for Solgar products is generally within 24 hours.

There is also another 1000 mcg B12 variant from Solgar, available in chewable tablets, and in the less easily absorbable form cyanocobalamin. This is available in a packaging of 250 tablets, priced at 33.75:

https://www.vitaminstore.nl/product/solgar-vitamins-vitamin-b-12-1000-ug-nuggets-b12-kauwtabletten-kauwtabletten-1289

Mannitol is indigestible and is not absorbed into the bloodstream. It has no effect on insulin production and therefore no impact on ketosis. Moreover, the amount in these tablets is very small.

Chewable tablets generally contain more excipients, such as mannitol and xylitol.

For this form of B12, methylcobalamin, slow absorption is not necessary. This form of B12 is also excellently absorbed in the stomach. Therefore, the nuggets can be swallowed whole, although there is nothing wrong with chewing them first and allowing them to dissolve slowly.