Volunteering provides unique benefits to organisations, recipients, and potentially the volunteers themselves. This umbrella review examined the benefits of volunteering and their potential moderators. Eleven databases were searched for systematic reviews on the social, mental, physical, or general health benefits of volunteering, published up to July 2022. AMSTAR 2 was used to assess quality and overlap of included primary studies was calculated. Twenty-eight reviews were included; participants were mainly older adults based in the USA. Although overlap between reviews was low, quality was generally poor. Benefits were found in all three domains, with reduced mortality and increased functioning exerting the largest effects. Older age, reflection, religious volunteering, and altruistic motivations increased benefits most consistently. Referral of social prescribing clients to volunteering is recommended. Limitations include the need to align results to research conducted after the COVID-19 pandemic. (PROSPERO registration number: CRD42022349703).

志愿服务为组织、接受者以及潜在的志愿者本身提供了独特的好处。这项总体审查审查了志愿服务的好处及其潜在的调节者。检索了 11 个数据库，以查找截至 2022 年 7 月发表的关于志愿服务的社会、心理、身体或一般健康益处的系统评价。AMSTAR 2 用于评估质量，并计算了纳入的初步研究的重叠。其中包括 28 条评论；参与者主要是美国的老年人。尽管评论之间的重叠率很低，但质量普遍较差。在所有三个领域都发现了好处，其中死亡率降低和功能增强发挥了最大的作用。年龄增长、反思、宗教志愿服务和利他动机最能持续增加福利。建议将社会处方客户转介至志愿服务。局限性包括需要将结果与 COVID-19 大流行后进行的研究保持一致。（PROSPERO 注册号：CRD42022349703）。