Because men may experience depression as constant irritability or angry reckless behavior, you may want to avoid using the term depression when first broaching the subject.  Try describing his behavior as seeming stressed or tired.  This could encourage him to open up.  Point out any changes in his behavior without being critical.  This is less presuming and allows him to open up at his discretion. For example, you could say you've noticed that he hasn't been working out with you in the past month.  Suggest a general check up with a physician.  Many men are less resistant to see a family doctor than a mental health professional. If you believe that your loved one may be suffering from depression, it's important that you encourage them to go see a doctor or psychologist. Due to the high risk of suicide, men need to seek immediate attention if they have been having suicidal thoughts.  As you can see, the signs that men display are not your classic depression symptoms. It is important to be familiar with these signs regarding the mental state of a loved one. If you're unsure, talk to your own psychologist or doctor for advice on what your next step should be. Offer to help him find a mental health provider and go with him on the first visit.  Finally, encourage him to make an honest list of symptoms to discuss including physical, emotional, and substance use. Depression, when episodic, is especially treatable. For example, symptoms of depression can be helped by eating a more nutrient-rich diet. Encourage your loved one to eat healthily by eating healthily with them and cooking together at home. Foods that are high in amino acids help improve neurotransmitter balance. Try to incorporate more omega-fatty acids into his (and your) diet, which are easily had in salmon, mackerel, and tuna. If he's not a fan of fish, turn to flax seed oil or supplements. Becoming more active has helped a lot of people with their symptoms. Once again, that's because exercise plays a role in neurotransmitters. Although his energy levels may be low, help him start being more active by being more active with him. Some have found great success in yoga, as it helps relax the mind and body. If cardio and other more vigorous activities aren't on the table, know that less intense workouts (yoga, walking, etc.) are also helpful. Supporting a male in your life with depression requires understanding and patience.  Engage him in conversation and listen carefully.  Don't disregard his feelings he expresses, but do point out realities and offer hope.  Invite him out for walks and other activities.  Know he's not going to feel like going, so be gentle but insistent.  Encourage participation in activities he once enjoyed, including hobbies and sports.  However, be careful not to overwhelm him.  Do not accuse him of faking feelings and do not expect him to “snap out of it.”  Instead, reassure him and yourself that with time he will feel better. You may also need to monitor therapy attendance or medication usage.  Encourage him to follow orders about the use of the therapists and doctors.  Professional recommendations are going to be the most helpful throughout treatment.

Summary:
Encourage him to open up. Help your loved one to seek treatment. Help him eat a healthy diet. Get active with your loved one. Be gentle but insistent.