Why NAD+ Levels Drop As We Age (And What To Do About It)

Why does NAD+ drop as we get older?

Unfortunately, this is one of those things that's just part of aging, but knowing about it means you can actually do something about it. Here's what's behind the decline:

• It naturally drops with age. After 40, NAD+ levels can fall by nearly 50%. By around 60, they're often almost completely depleted. (Yes, really.)

• Oxidative stress burns through it. More damaged cells use up NAD+ faster than the body can replace it.

• Chronic inflammation drains reserves. Long-term inflammation from things like a poor diet, chronic stress, alcohol, or excess weight all chip away at your NAD+ stores.

• Your NAD+-making enzymes slow down. The machinery that produces NAD+ just becomes less efficient over time.

• Lifestyle habits speed it up. Poor sleep, little exercise, and a lot of processed food all accelerate the decline.

How do you know if your NAD+ is low?

Some of these signs might feel pretty familiar:

• Constant fatigue that sleep doesn't seem to fix
• Brain fog or memory that feels a little fuzzier than it used to
• More noticeable fine lines, wrinkles, or pigmentation
• A metabolism that feels like it's working against you
• Getting sick more often or taking longer to recover
• Muscle weakness or slower recovery after workouts

Sound like anyone you know? You're definitely not alone.

Okay, so how do you actually boost NAD+?

Good news, there are a few solid paths forward, and you can mix and match based on what works for your lifestyle.

Supplements and medical options

• NMN and NR are precursors to NAD+, meaning your body uses them to make more of it. These are the most popular supplement options right now.

• NAD+ IVs and injections are available in clinical settings if you want a more direct approach.

• Niacin and niacinamide (vitamin B3) also support NAD+ production, though niacin can cause some flushing for certain people.

Just a heads-up: always loop in your doctor or a functional medicine practitioner before starting any supplements or IV treatments. Everyone's body is different.

Topical NAD+ for your skin

Here's something a lot of people don't realize, you can also support NAD+ locally, right at the skin level. A well-formulated topical serum containing NAD+ or ingredients that support its production can help skin cells repair themselves and boost cellular energy right where you need it most.

The SDL BioBarrier Repair System takes this approach with a gentle, five-step routine: Dewy Herbal Cleanser, Glow Duo Serum-Toner, Everything Lift Serum, Fountain of Firm Cream, and Blue Velvet Day/Night Mask. Everything is vegan, fragrance-free, emulsifier-free, and non-toxic, designed to work with your skin rather than overwhelm it.

Lifestyle habits that make a real difference

You don't have to overhaul your entire life, but a few consistent habits go a long way:

• Intermittent fasting can help activate those longevity sirtuins and conserve your NAD+ supply.

• Regular exercise, especially a mix of strength training and cardio, raises NAD+ levels and improves how your mitochondria function.

• Heat and cold therapy like saunas, infrared sessions, or cold plunges can stimulate NAD+ production by giving your body a controlled, beneficial stress response.

• Better sleep and stress management lower inflammation and help preserve what NAD+ you have.

• Eating B vitamin-rich foods like avocado, eggs, salmon, nuts, and leafy greens gives your body the raw material it needs to make more NAD+.

A simple daily plan to get started

You don't need to do everything at once. Start here:

1. Move your body with a mix of strength and cardio three to five times a week.

2. Prioritize consistent sleep and build in small daily stress breaks — even five minutes of breathing or meditation counts.

3. Include B vitamin-rich foods at most meals.

4. Try intermittent fasting a few days a week if it fits your health needs.

5. Add a good topical NAD+ serum to your morning or evening routine to support skin repair from the outside in.

Your questions answered

• Does NAD+ actually affect how skin ages? Yes, and significantly. NAD+ helps skin cells generate energy and repair DNA damage. When levels are low, that repair process slows, and signs of aging like lines, wrinkles, and pigmentation become more noticeable.

• Can a topical serum really deliver NAD+ to skin cells? A well-formulated serum can, yes. The key is finding a non-toxic formula that's actually designed to penetrate deeper skin layers rather than just sit on the surface.

• Are NAD+ IVs safe? They're offered in medical settings and can raise levels more directly than supplements, but whether they're right for you really depends on your individual health. Definitely talk to a doctor first.

• What foods help boost NAD+? Anything rich in B vitamins is a great place to start, avocados, fish, eggs, salmon, nuts, and leafy greens are all solid choices.

• When do NAD+ levels actually start dropping? The decline typically begins after 40 and can cut levels nearly in half. By around 60, they're often close to fully depleted, which is why being proactive really matters.