Health · Fitness & Nutrition · 1 hr ago
B12 shots may help with fatigue only when levels are low
Med spas promote B12 shots as a quick energy boost, but extra vitamin B12 is unlikely to help people who already have enough.
B12 helps the body make red blood cells and DNA and keeps nerves working; a deficiency can cause fatigue and other health problems.
About 4% of US adults have low B12 levels, and the risk is higher for people over 60, vegans and some people with digestive conditions or certain long-term medication use.
Treating a deficiency can restore energy, but taking more B12 does not appear to boost energy or athletic performance when levels are adequate.
Some people may feel better after a shot because of a placebo effect, while spas can sell shots for much more than they cost.
Fatigue can have causes beyond B12, including poor sleep, low thyroid hormone and low iron.
Vitamin B12 shots may help fatigue caused by a deficiency, but extra B12 is unlikely to boost energy in people whose levels are already adequate.
About 4% of US adults have low B12 levels, and deficiency is more common among adults aged 60 and older.
B12 helps the body make red blood cells and DNA and keeps nerves working properly.
Low levels can cause fatigue and other health problems, while several conditions, medicines and dietary factors can raise the risk of deficiency.
Fatigue has many possible causes, so the article says it is worth considering factors beyond B12.
- Who
- People with low B12 levels may benefit from treatment; people with adequate levels are unlikely to benefit from extra doses.
- What
- The article examines whether B12 shots improve energy and explains that they may help fatigue caused by a deficiency.
- When
- The article was published on 2026-11-08.
- Where
- The article discusses US adults and typical US med spa prices.
- Why
- B12 deficiency can cause fatigue, but extra B12 is unlikely to improve energy when levels are already adequate.
Med spa promoters
Medical view
Energy effects
Med spa promoters
Some med spa owners and employees say a B12 shot gives them a pick-me-up and recommend shots every few weeks.
Medical view
Andrea Dean says treating a deficiency can restore energy, but extra B12 is unlikely to help people with adequate levels.
Use of shots
Med spa promoters
Some med spas recommend injections as an energy lift.
Medical view
Dean says injections are unlikely to be worth their cost if B12 levels are normal.
This story does not have a timeline yet.
- Low B12 in US adults
- About 4%
- Higher-risk age group
- Adults aged 60 and up
- Typical US med spa shot cost
- $25 to $75
- Cost to spas
- Less than $1 a shot
What people are saying
We know that some of this is just all mental.
It’s not just B12.