Hero Nutritionals Slice Of Life Organics Energy + B12 Natural Berry Flavor

Our assessment

The evidence shows that this product provides vitamin B12 and calcium, but the data on its specific formulation is limited. For energy support, vitamin B12 is essential for red blood cell formation and neurological function [NIH ODS]. However, many people get enough B12 from their diet, and taking more than needed does not necessarily boost energy unless you have a deficiency. The calcium content supports bone health, but you should be aware of potential risks with excessive intake [NIH ODS].

How it works

Think of vitamin B12 as a fuel injector for your cells — it helps convert food into energy your body can use [NIH ODS]. Calcium works as a structural builder for your bones and a signal messenger for your nerves and muscles [NIH ODS]. Together, these nutrients support your body’s basic daily functions, but they are not a direct stimulant for an immediate energy boost.

Safety profile

FDA received a total of 592,059 adverse event reports across all supplements, but data on this specific product is not available. For calcium, high intakes can lead to constipation, nausea, and kidney issues [NIH ODS]. High levels in the blood may cause poor muscle tone, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium supplements can also reduce the absorption of medications like tetracycline antibiotics and levothyroxine [NIH ODS].

Our recommendation

Start by checking your vitamin B12 and calcium levels through a blood test before taking this supplement. If you have a confirmed deficiency, this product may help. Take it with food to aid absorption. Be cautious if you take other medications, and do not exceed the recommended dose. For most people, a balanced diet provides sufficient B12 and calcium without the need for additional supplementation [NIH ODS].

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide