HoneyPezil Tingling, Flushing or Upset Stomach: Possible Causes and What to Do
Tingling or pins and needles
Beta-alanine is known for causing paresthesia, a harmless prickling usually felt on the face, neck or hands. The ISSN position stand on beta-alanine describes it as the only commonly reported side effect in studied doses. It does not mean the product is working or failing.
Warmth and redness
Niacin can cause flushing, a warm, red, sometimes itchy feeling that typically passes within an hour. The NIH niacin fact sheet explains why it happens and when higher doses become a concern.
Stomach upset
Amino acids and niacin can upset some stomachs, especially on an empty stomach or in larger amounts. Take the capsule as the label directs, with water, and do not double up after a missed day.
What to do if you notice something
- Note what you felt, when it started and how long it lasted.
- Do not increase the amount.
- Tell your clinician or pharmacist if it recurs or bothers you.
- Keep the bottle and lot number.
Red flags: stop and get help
Seek urgent medical care for trouble breathing, swelling of the face or throat, fainting, chest pain, a spreading rash or severe stomach pain. You can also report a reaction to the FDA through MedWatch.
Who should be extra careful
People taking blood-pressure medicine, blood thinners or nitrates, or with kidney, liver or heart conditions, should talk to a clinician first; see who should skip it.
A short symptom diary
Write down the date, time you took the capsule, what you ate, what you felt and how long it lasted. After a week, patterns often appear, such as symptoms only on an empty stomach. Bring the diary to your clinician if the symptoms keep happening; it is more useful than memory alone.
What not to do
- Do not take extra capsules to "push through".
- Do not mix with other niacin or amino-acid products without advice.
- Do not ignore symptoms that get stronger over time.
Frequently asked questions
Sources
- PubMed: International Society of Sports Nutrition position stand: beta-alanine (2015)
- NIH Office of Dietary Supplements: Niacin fact sheet
- FDA MedWatch adverse event reporting
General information, not medical advice. Offer details were checked on November 11, 2026; confirm on the order page and read the label on your bottle. See our disclaimer and how we research.