Nutritional psychiatry

Domain IX · Biomedical, neuro & digital · 2015

What it is

Nutritional psychiatry is a research field and clinical framework, not a single psychotherapy. Its core claim, set out in a 2015 viewpoint written on behalf of the International Society for Nutritional Psychiatry Research (ISNPR), is that diet and nutrition should be recognised "as central…

Format

• Format: part of the ordinary intake or a single focused segment of a session.
• Format: one session segment, revisited briefly at later sessions; readiness is reassessed each session.

Who practises it, and how they are trained or regulated

• Who delivers it. In SMILES, the dietary intervention was delivered by an Accredited Practising Dietitian (Australia). Staudacher et al. (2025) state that mental health clinicians are "well placed" to raise diet, assess intake, give psychoeducation and support change, and should refer to a specialist dietitian where needed. Individualised dietary prescription belongs to registered or accredited dietitians; the…

Evidence status, as the guide reports it

• Evidence status (attributed).

Questions to explore with your client

• What drew you to it, and what are you hoping it will change?
• Does it involve any substance, plant preparation, remedy or supplement? Has your doctor or prescriber been told, especially about any medication you take?
• Does it involve intense or unusual breathing? Have you been told about the medical conditions for which that is not advised?
• Does it involve fasting, a special diet or 'detox'? Have you discussed this with your doctor?
• Is it a group, retreat or community? How do they respond if someone wants to leave or raises a concern?
• Who runs it, and what training or registration do they hold?
• What actually happens in a session or meeting, and how often?
• What does it cost, and is there pressure to commit to more?
• How do you feel afterwards, in the hours and days that follow?
• Does it fit with, or clash with, the work we do here?

What practitioners of it watch for

• access barriers (cost, waiting lists) that need problem-solving in therapy.
• conflicting advice between professionals; the client feeling monitored. Working: the client can describe one shared plan.
• self-criticism after lapses; loss of all gains when therapy ends. Working: the client can describe their own restart plan.
• comparison and body talk in groups (risky for some clients). Working: attendance continues and the client reports feeling supported.
• loss-of-control eating, bingeing or compensatory behaviour (B2, refer). Working: urges are noticed earlier and responded to with more choice.

When to involve someone else

• New or worsening physical symptoms, or advice to stop or change prescribed medication: involve the client's doctor or prescriber.
• Signs of coercion, isolation from family and friends, escalating costs or secrecy: discuss openly and consider safeguarding.
• A crisis or thoughts of suicide: follow your crisis protocol. In the US, call or text 988; in the UK and Ireland, Samaritans on 116 123.

Drawn automatically from the guide's own sections. Stay curious: neither endorse nor dismiss what the client values, and check anything that matters against the full guide and its sources. Not medical advice.