Quick answer: AMPK is an enzyme that acts as your cells’ energy sensor. When energy runs low, such as during exercise or between meals, AMPK switches cells toward burning fuel, improves insulin sensitivity, supports new mitochondria and turns on autophagy, the cell’s cleanup system. Exercise, time-restricted eating, cold and heat exposure, and certain plant compounds such as berberine are common ways to activate it.
Key takeaways
AMPK is an enzyme that acts as your cells’ fuel gauge, switching them toward burning energy and cleanup when fuel runs low.
It sits at the center of nutrient sensing, the system cells use to decide between growing and repairing as we age.
Exercise, especially intervals and strength work, and time-restricted eating are everyday ways to switch it on, while some botanicals studied for AMPK can interact with medications.
How AMPK works
Inside every cell, AMPK senses the ratio of used energy (AMP) to available energy (ATP). When energy is low, it:
It slows mTOR, the growth pathway, so the cell conserves resources, and it increases fat burning and the creation of new mitochondria. It helps muscles take up glucose, improving insulin sensitivity, turns on autophagy to clear damaged cell parts, and may calm inflammatory pathways.
AMPK and healthy aging
AMPK sits at the center of nutrient sensing, the system cells use to decide whether to grow or to repair. With age, that system tends to tilt toward “always grow,” while autophagy and mitochondrial renewal slow down. Regularly activating AMPK may help tilt the balance back toward repair. Animal studies are promising; human research is still developing. Related: autophagy and insulin sensitivity.
Everyday ways to activate AMPK
Exercise, especially intervals and strength training, activates AMPK, as does time-restricted eating, such as a 12-hour overnight gap. Brief cold exposure, sauna or other heat exposure, and morning sunlight with regular sleep help too.
Nutrients and botanicals studied for AMPK
Berberine has been studied for blood sugar and cholesterol and can interact with many medications. Quercetin and fisetin are plant flavonoids also studied for clearing senescent cells, and resveratrol and pterostilbene are polyphenols that work alongside NAD+ pathways. Alpha-lipoic acid supports glucose handling and nerve health, and gynostemma (jiaogulan) is a traditional herb studied for metabolic health.
Amounts and timing should be individualized. If you work with me, the products I use are in my Fullscript dispensary. See also NAD+ for cellular energy.
Safety
Berberine can lower blood sugar and interacts with many medications, and it is not safe in pregnancy. Several of these compounds affect blood sugar, blood pressure or bleeding. Talk with your provider first, especially if you take diabetes, blood pressure or blood-thinning medication, or have surgery planned.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you have insulin resistance, prediabetes or stubborn weight, or if you want a longevity plan built on evidence, not hype. The same is true if you take medications and want to use metabolic supplements safely, or if your energy and exercise recovery are declining.
See a medical provider promptly for symptoms of low blood sugar such as shakiness, sweating or confusion, especially if you take diabetes medication.
Want a metabolism and longevity plan built for you?
A free 15-minute consultation with Dr. Kneessi. No cost, no obligation. In-office in Odenton, MD or by telehealth.
Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Which everyday habits would be the most practical way for me to support AMPK?
Could any of my current medications or supplements interact with the options discussed here?
Would any lab testing add useful information in my situation, or is it reasonable to start with daily habits?
Which one or two changes would be most worthwhile for me to focus on first?
Practitioner-grade options in my Fullscript catalog: if you and your clinician decide a supplement makes sense, my supplement guide by health goal links to the practitioner-grade products I trust.
Frequently asked questions
What does AMPK do?
It senses low cellular energy and switches the cell toward burning fuel, improving insulin sensitivity, building mitochondria and cleaning up damaged parts.
What is the best way to activate AMPK?
Regular exercise is the most reliable. Time-restricted eating, cold and heat exposure also help.
Is berberine like metformin?
Both affect AMPK and blood sugar, but they are different. Berberine interacts with many drugs and should be used with guidance.
Does AMPK slow aging in humans?
AMPK supports processes linked to healthy aging, but long-term human data are still limited.
Sources
- Herzig S, Shaw RJ. AMPK: guardian of metabolism and mitochondrial homeostasis. Nat Rev Mol Cell Biol 2018. PMID: 28974774. https://pmc.ncbi.nlm.nih.gov/articles/PMC5780224/
- Kim J, Kundu M, Viollet B, Guan KL. AMPK and mTOR regulate autophagy through direct phosphorylation of Ulk1. Nat Cell Biol 2011. PMID: 21258367. https://pmc.ncbi.nlm.nih.gov/articles/PMC3987946/
- López-Otín C, et al. Hallmarks of aging: An expanding universe. Cell 2023. PMID: 36599349. https://pubmed.ncbi.nlm.nih.gov/36599349/
- Lan J, et al. Meta-analysis of the effect and safety of berberine in the treatment of type 2 diabetes mellitus, hyperlipemia and hypertension. J Ethnopharmacol 2015. PMID: 25498346. https://pubmed.ncbi.nlm.nih.gov/25498346/
- Richter EA, Ruderman NB. AMPK and the biochemistry of exercise: implications for human health and disease. Biochem J 2009. PMID: 19196246. https://pmc.ncbi.nlm.nih.gov/articles/PMC2779044/
- NIDDK: Insulin Resistance & Prediabetes
- NCCIH: Using Dietary Supplements Wisely
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
