What a peer who’s been there can do that a clinician can’t

Key takeaways

• A 2020 Cochrane review of 27 studies found that structured Alcoholics Anonymous and twelve-step programs usually kept more people continuously sober than other established treatments.
• In 116 trials of breastfeeding support, help from lay or peer supporters worked about as well as help from professionals.
• In type 2 diabetes, peer support lowered A1c by about half a point, mainly in people whose blood sugar started high, and community health worker programs did about as well.
• For adults in mental health care, 19 trials found one-to-one peer support may build empowerment and a sense of recovery but did not ease symptoms or cut hospital use.
• A good peer shares experience, knows their limits and keeps your clinicians in the loop; anyone who tells you to quit prescribed treatment is outside that role.

In 2020, a Cochrane team led by John F. Kelly pooled 27 studies with 10,565 people. They wanted to know how well Alcoholics Anonymous and “twelve-step facilitation,” counseling that helps people get involved in AA, really work¹.

Structured, manual-based versions usually led to higher rates of continuous sobriety than other established treatments¹. The review also found that these programs probably cut health care costs substantially¹.

AA is built on people in recovery helping each other. That is the idea behind peer support: someone who has lived through what you’re facing can offer things a clinician often can’t.

Peer support is no longer only folding chairs and coffee. It is a paid job with training rules, Medicaid and Medicare billing, and a growing research base. That research shows clear wins in some areas and clear limits in others.

Peer support is now a paid job with training rules

The federal Substance Abuse and Mental Health Services Administration (SAMHSA) describes peer support as help between people who share an experience, such as a mental health condition or addiction². Peer workers offer non-clinical support built on strengths. They show that recovery is possible, help set goals and link people to resources².

Job titles include peer specialist, peer recovery coach and peer advocate. Peers work in recovery centers, emergency departments, shelters, drug courts and primary care offices². SAMHSA says their job is to add to the work of therapists and case managers, not to duplicate or replace it².

Payment rules came next. In 2007, the Centers for Medicare & Medicaid Services (CMS) told states that Medicaid could pay for peer support under three conditions⁴. A mental health professional must supervise the peer, the service must fit a care plan with measurable goals, and the peer must complete state training and certification⁴.

Coverage is optional for states. The Government Accountability Office (GAO) found that 37 states covered peer support for adults with substance use disorders in 2018⁵. In the three states GAO studied closely, peer support added to clinical treatment rather than replacing it⁵.

Medicare joined in 2024. New billing codes pay for health navigation and community support by community health workers, navigators and peer support specialists working under a clinician’s supervision⁶. One set covers peer support specialists who help people with serious mental illness or substance use disorders⁶.

The wider workforce is growing too. Community health workers held about 64,700 U.S. jobs in 2025, with median pay of $51,850, and the field is projected to grow 13% by 2035⁷. They often come from the communities they serve, or share a language, background or health condition with them¹¹.

Some peers you may already know. WIC, the federal nutrition program for women, infants and children, trains mothers from the community who breastfed their own babies to support new moms⁹. When a problem goes beyond their role, they refer mothers to WIC breastfeeding experts⁹.

Where peer support has the strongest evidence

Alcohol recovery. The Cochrane review found that structured AA and twelve-step programs usually beat other established treatments on continuous abstinence¹. They did about as well on how much people drank when they did drink¹. The certainty of the evidence ranged from very low to high, depending on the outcome¹.

Breastfeeding. A 2022 Cochrane review pulled together 116 trials with 98,816 women⁸. With extra support, 17% fewer women stopped breastfeeding exclusively by four to six weeks, and about 10% fewer had stopped by six months⁸.

The striking part was who gave the help. The review found no clear difference between support from professionals and support from lay or peer supporters⁸. Phone and digital help worked about as well as face-to-face visits, and about four to eight scheduled contacts seemed to work best⁸.

Type 2 diabetes. A 2015 review of 13 randomized trials with 2,352 adults found that peer support lowered A1c by 0.57 points compared with usual care¹⁰. A1c is a blood test that reflects average blood sugar over recent months. People who started at 7.5% or higher benefited most. Those below 7.5% saw no clear change¹⁰.

Contact mattered. Programs with moderate or frequent contact lowered A1c, while low-contact programs did not show a clear effect¹⁰.

The Community Preventive Services Task Force reviewed 44 studies of community health workers in diabetes care¹¹. It found strong evidence and recommended these programs in 2017. A1c fell by a median of 0.49 points, and studies reported fewer emergency visits¹¹.

The Task Force also found the approach cost-effective. Programs cost a median of $585 per person per year, in 2016 dollars¹¹. The cost per quality-adjusted life year, a measure of healthy life gained, was $38,276, below a common $50,000 benchmark¹¹.

Where peer support helps less than people hope

Mental illness is the hardest test. A 2020 review of 19 randomized trials with 3,329 adults looked at one-to-one peer support for people using mental health services¹². It found no effect on clinical symptoms or on use of services such as hospital care¹².

The same review did find signs of modest gains in empowerment and in people’s own sense of recovery¹². Peer support might also widen people’s circle of social support, the authors suggested. They cautioned that incomplete reporting in many trials pointed to bias in the evidence¹².

Put these findings next to the wins above and a pattern shows up. This is our reading, not any single study’s conclusion.

Peer support seems strongest when the goal is something a person does every day, like staying sober, nursing a baby or managing blood sugar. It may also build hope and confidence. It does not replace treatment for the symptoms of a mental illness.

Cancer support groups offer a similar kind of help. The National Cancer Institute (NCI) says groups can help people feel less alone and more hopeful, and can help with practical problems and side effects¹³. NCI also notes that some people don’t like hearing about others’ struggles, and that a group’s value can change over time¹³.

What the evidence says, by goal

Goal	What research found	Evidence rating
Staying sober from alcohol (AA and twelve-step programs)	More continuous abstinence than other treatments in structured versions1	Strong evidence, certainty varies by outcome
Continuing to breastfeed	Fewer mothers stop early; peers and professionals about equal8	Strong evidence
Lowering A1c in type 2 diabetes	About 0.5 points lower, mostly when A1c starts high1011	Strong evidence
Feeling empowered and in recovery, for people in mental health care	Modest gains in 19 trials, with signs of bias12	Promising but early
Reducing mental illness symptoms or hospital use	No effect in the same trials12	Evidence says no
Coping with cancer in a support group	Comfort, hope and practical help; value varies by person13	Promising but early

What a good peer does, and the lines they shouldn’t cross

One peer worker quoted by SAMHSA summed up the role this way: “I am an expert at not being an expert”². A peer’s power comes from shared experience, not from a license.

In February 2026, SAMHSA updated its core skills for peer workers³. The list includes building caring relationships, sharing lived experience, supporting recovery plans, linking people to services and helping manage crises³. Peer workers are expected to recognize the limits of what they know and to get help from others when needed³.

The person being helped stays in charge. SAMHSA says taking part in peer support is always the person’s choice, and peer workers don’t dictate which services someone receives³.

From those rules, a few lines follow. This is our summary of what the role implies, since a peer’s role is non-clinical by design².

• A peer does not diagnose you or tell you what condition you have.
• A peer does not tell you to stop, start or change a prescribed medicine. That conversation belongs with your prescriber.
• A peer does not sell you products or recruit you into a business.
• A peer does not ask you to hide your choices from your doctors.
• A peer knows when to call in a professional, especially in a crisis.

Formal programs build these lines in. Medicaid-funded peers work under supervision and inside a care plan⁴. WIC peer counselors hand off harder problems to breastfeeding experts⁹.

Natural health has always believed in mutual aid

Natural health values self-reliance, community and knowledge earned through experience. Peer support fits all three. People who have walked a hard road often know the practical tricks no textbook covers, and their example can make change feel possible.

Self-reliance never meant doing it alone. The AA research shows how much a community of peers can add, especially when people get structured help to connect with it¹.

The same respect calls for honesty about what a story can prove. A peer can tell you what recovery felt like and what helped them cope. Their story cannot show that a particular herb, diet or supplement caused their improvement. Hold a fellow member’s testimonial to the same standard you’d hold a drug ad.

A scorecard for good peer support

Use this checklist, our own tool, after a first meeting or a few sessions. Give one point for each “yes.”

1. The peer or group leader has training, and you know who backs them up.
2. They share their story to help you, not to make you copy it.
3. They ask what you want, and your goals lead.
4. They encourage you to keep your clinicians informed.
5. They can name where to send you for problems beyond their role.
6. There is a plan for a crisis, including 988.
7. Nothing is for sale, and no one recruits you.
8. Privacy rules are stated, and people follow them.
9. People who take medicine and people who don’t are both welcome.
10. You leave feeling more hopeful and more capable, not more dependent.

A score of 8 or more is a strong sign. From 5 to 7, ask questions about the gaps. Below 5, or if any red flag in the box below shows up, look elsewhere.

How to find peer support, and when to get help now

If you or someone near you is thinking about suicide, or is in emotional crisis, call or text 988, or chat at chat.988lifeline.org¹⁴. The line is free, confidential and open around the clock. It also helps with alcohol and drug concerns, and text and chat work in Spanish¹⁴. Call 911 if someone is in immediate danger.

For ongoing support, these are good starting points:

• Mental health or substance use: SAMHSA’s Find Support page helps you locate support groups, local programs and ways to pay¹⁵. If you have Medicaid, ask your plan whether it covers peer support, because states differ⁵.
• Medicare: Ask your clinician’s office whether it offers navigation or community health services delivered by peer support specialists or community health workers⁶.
• Breastfeeding: Ask your local WIC office about peer counselors⁹.
• Cancer: Ask your care team, a hospital social worker or an advocacy group for your cancer type. Many organizations can pair you with someone who has had your type of cancer¹³.
• Diabetes: Ask your clinic whether it works with community health workers or peer coaches¹¹.

Questions readers ask

The bottom line

Peer support is one of the oldest forms of care, and it now has real evidence behind it. It helps people stay sober, keep breastfeeding and bring down high blood sugar, often as well as professional help for those goals. It may build hope and confidence for people in mental health care, but it does not treat their symptoms.

The best peer support works next to your care team, not against it. Look for a trained peer who shares experience, respects your choices, knows their limits and never asks you to drop treatment you need.

Keep exploring: shared learning health, disagreeing with family about health and supporting a loved one’s health.

Related reading

• Learning health skills together works when the group checks its facts
• How to tell psychiatrists, psychologists and therapists apart
• Living with a condition that isn’t going away
• Health coaching is real, unregulated, and easy to get wrong
• What to say when a doctor isn’t taking you seriously

Sources

1. Kelly JF, Humphreys K, Ferri M. “Alcoholics Anonymous and other 12-step programmes for alcohol use disorder.” Cochrane Database of Systematic Reviews, 2020 (Cochrane summary). cochrane.org
2. Substance Abuse and Mental Health Services Administration. “Value of Peers, 2017.” SAMHSA, 2017. samhsa.gov
3. Substance Abuse and Mental Health Services Administration. “Core Competencies for Peer Workers in Behavioral Health Services.” SAMHSA, updated 2026. samhsa.gov
4. Centers for Medicare & Medicaid Services. State Medicaid Director Letter SMDL #07-011 on peer support services. CMS, 2007. medicaid.gov
5. U.S. Government Accountability Office. “Substance Use Disorder: Medicaid Coverage of Peer Support Services for Adults” (GAO-20-616). GAO, 2020. gao.gov
6. Centers for Medicare & Medicaid Services. “Calendar Year (CY) 2024 Medicare Physician Fee Schedule Final Rule” fact sheet. CMS, 2023. cms.gov
7. U.S. Bureau of Labor Statistics. “Community Health Workers.” Occupational Outlook Handbook. bls.gov
8. Gavine A, Shinwell SC, Buchanan P, et al. “Support for healthy breastfeeding mothers with healthy term babies.” Cochrane Database of Systematic Reviews, 2022 (Cochrane summary). cochrane.org
9. U.S. Department of Agriculture, WIC Breastfeeding Support. “WIC moms helping moms.” USDA. wicbreastfeeding.fna.usda.gov
10. Qi L, Liu Q, Qi X, et al. “Effectiveness of peer support for improving glycaemic control in patients with type 2 diabetes: a meta-analysis of randomized controlled trials.” BMC Public Health, 2015. bmcpublichealth.biomedcentral.com
11. Community Preventive Services Task Force. “Diabetes Management: Interventions Engaging Community Health Workers.” The Community Guide, 2017 (updated 2025). thecommunityguide.org
12. White S, Foster R, Marks J, et al. “The effectiveness of one-to-one peer support in mental health services: a systematic review and meta-analysis.” BMC Psychiatry, 2020. bmcpsychiatry.biomedcentral.com
13. National Cancer Institute. “Support Groups.” NIH, updated 2024. cancer.gov
14. 988 Suicide & Crisis Lifeline. Home page. 988lifeline.org
15. Substance Abuse and Mental Health Services Administration. “Find Support.” SAMHSA. samhsa.gov