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doi: 10.1111/J.0954-6820.1968.TB02452.X

Vitamin B12 plays a critical role in energy production by converting fats and carbohydrates into usable energy, helping combat fatigue, especially on a calorie-restricted diet

In addition, the marketed benefits of BPC-157 have only been shown in lab or animal studies (rats, mice, and dogs)

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Symptoms like fatigue, tingling, or brain fog may indicate a deficiency
The Journal of Physiology, 592 (Pt 7), 1425-1426
