Nearly one million people aged over 75 live in poverty and need more help from the government, a report suggests.
The charity Independent Age says ministers should do more to make older pensioners aware they can top up their pensions with other benefits.
It also suggests the income of those aged over 75 is, on average, £3,000 a year less than younger pensioners.
Pensions minister Baroness Ros Altmann said the government had run campaigns to encourage pension credit claims.
In its report, Independent Age defines the "poverty threshold" for a single pensioner as £182 a week before housing costs. For couples, its figure is £272 per week.
http://www.bbc.co.uk/news/uk-36297605