Found: Energy all day!

Can’t remember the last time you powered through a busy day without feeling fatigued? We know exactly how you feel! Here’s help!

1 Trouble focusing? Consider B-12

Feeling tired, having trouble concentrating and recalling details (like names) are the top three signs of a vitamin B-12 deficiency, researchers report in JAMA Psychiatry. The reason, explains study coauthor Greg Kalpouzos, PH.D.: B-12 is difficult to absorb from food— and shortfalls can actually mimic Alzheimer’s disease.

■ Energizing Rx: A daily 1,000-mcg. dose of sublingual (under-the-tongue) B-12 can have you all-day energized and mentally focused in three weeks.

● Important: Always check with your doctor before starting a new supplement.

2 Aches and pains? Add more protein

Your body uses protein to keep your nervous system energized and your muscles in great repair, which is why even a slight protein shortfall doubles your risk of feeling tuckered out and achy, according to a study in Nutrients. Yet as your protein needs increase as you age, your ability to digest protein-rich fare (like red meat)

drops. The fi x? Mixing three tablespoons of whey protein powder (which is easily absorbable) into a daily smoothie could send your tiredness— and soreness— plunging 52% in one month.

■ Not a smoothie fan? Mix protein powder into the milk you use in your morning cereal for a creamier, tastier start!

3 Never “in the mood”? Soak in some sunshine

Vitamin D-3 ups your production of the energizing hormone dopamine while also switching on genes that help you produce testosterone, the hormone of desire! In fact, Cornell University scientists say taking 4,000 IU of D-3 daily cuts fatigue in half— plus revs a flagging sex drive—in 60 days.

■ Bonus! Exposing your eyes to the sun (without sunglasses on) in the a.m. can help reset your body clock so you sleep better!

4 Trouble sleeping? Sip this lemony tea

If you find your mind caught up in a worry wheel at night, your brain may be craving magnesium. This mineral prompts your cells to produce energizing enzymes during the day; then when darkness falls, magnesium triggers the production of sleep-inducing melatonin. In fact, a nightly 400mg. dose can decrease tiredness 57% in 10 days. The easy way to up your stores? Sip a lemon-flavored magnesium “tea” (like Natural Vitality Natural Calm Sweet Lemon, $25, Vitacost.com) before bed.