Natures Bounty B12 Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Vitamin B12 can be found in nearly every energy and weight loss supplement sold today. This B vitamin is supposed to boost energy and help dieters lose weight, but there are no clinical studies supporting these claims. Vitamin B12 is stored in the body when absorbed via foods like meat, eggs and dairy. But, oral forms of the vitamin are not stored because the body breaks down the supplement leaving very little of the B12 to be used by the body. Vitamin B12 is a water-soluble vitamin, which is why most dieters will see a change in urine color as the vitamin passes out of the body. Even though Nature’s Bounty B12 includes 2,500 mcg or 41,000-percent of the daily recommended amount of B12, only a small fraction of that makes it through the digestive process.

List of Ingredients

Vitamin B12 (Cyanocobalamin).

Product Features

Feeling a little lethargic? Why not stop at the local convenience store on the way to work for an energy drink? Before drinking that liquid energy, take a look at the ingredient label. You will likely find vitamin B12 and caffeine. Vitamin B12 is one of the most heavily promoted energy ingredients on the market, but the vitamin does very little to promote energy levels. It is that caffeine that boosts energy, not the vitamin B12.

Nature’s Bounty B12 includes more than 40,000-percent of the B12 the body needs every day. Of that 40,000-percent, a miniscule amount makes it through the acids in the stomach. Of the tiny amount, a large portion is lost through urination, so what is the dieter left with; not much. According to dietary experts, the body gets all the vitamin B12 it needs from natural sources and the body does not need much.

There are reasons for taking B12 supplements, such as vitamin B12 deficiency, but Nature’s Bounty B12 will not solve that problem. Dieters recovering from gastric bypass surgery are often given a prescription for vitamin B12 injections once a month. This is because of potential vitamin deficiency from an extremely low calorie diet and other medical reasons.

There are no clinical trials supporting claims of increased weight loss after taking vitamin B12. As a matter of fact, deficiency in B12 leads to weight loss, so theoretically taking Nature’s Bounty B12 could increase weight gain.

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  • All ingredients for Nature’s Bounty B12 are listed online.
  • There is no toxic level for B12.


  • B12 is water-soluble so much of the vitamin washes out of the body.
  • The body gets more than enough B12 from dietary sources.
  • B12 supplements are digested leaving little active vitamin.


There are plenty of weight loss ingredients that have no proven effect on weight loss. Nature’s Bounty B12 is just another in the long list of supplements the dieter simply does not need.

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