I'm National Head Coach at Legends Boxing, and I've worked with everyone from executives to everyday people trying to reverse pre-diabetes through training. The one supplement I personally take is protein powder--specifically whey isolate at 40g within 30 minutes post-workout. When I was training for my first amateur fight while also building our nationwide coaching program, I learned the hard way that cardio-heavy training like boxing absolutely destroys your muscles if you're not feeding them properly. I was losing weight but also losing the functional strength I needed in the ring. One of our members who's a lab director lost 50 pounds but hit a wall until he started hitting 0.8-1g protein per pound of body weight--suddenly his recovery improved and he could train consistently without feeling depleted. I use Optimum Nutrition Gold Standard because it mixes fast between coaching sessions and doesn't sit heavy in my stomach before sparring. Boxing is different from bodybuilding--you need the muscle recovery without the bulk that slows you down. Since dialing in that 40g post-workout window, my shoulders stopped aching between training sessions and I could actually show up six days a week without feeling like I was breaking down. The supplement industry loves to overcomplicate things, but protein is the one non-negotiable if you're doing any serious physical training. Your muscles are literally made of it, and most people I coach are chronically under-eating it while wondering why they're always sore.
One supplement I personally take is deer antler velvet. I value it for its unique profile of naturally occurring growth factors, amino acids, and minerals that support recovery, connective tissue health, and overall vitality. From a performance and longevity standpoint, it has been especially helpful for supporting joint comfort and post-exercise recovery as training demands increase with age. My advice to anyone considering deer antler velvet is to focus on sourcing and quality. It should be properly harvested, processed, and tested to ensure consistency and purity. Like any supplement, it works best as part of a broader foundation that includes smart training, adequate nutrition, and recovery, not as a shortcut or standalone solution.
I've been a certified personal trainer for 14+ years and lead the fitness team at Results Fitness in Alexandria, Virginia. The one supplement I personally take is **omega-3 fish oil** (specifically Nordic Naturals Ultimate Omega)--1000mg with breakfast every day. Here's my reasoning: as a Les Mills instructor teaching SPRINT, BodyPump, and CXWORX multiple times per week on top of personal training clients, my joints take a beating. Omega-3s have strong anti-inflammatory properties that help with recovery and joint health. I noticed within about 6 weeks of consistent use that my knee discomfort after high-impact classes reduced noticeably--I could teach back-to-back sessions without that lingering soreness. Beyond the physical benefits, there's solid research showing omega-3s support cognitive function and mood regulation. When you're managing a team, programming classes, and keeping energy high for members all day, mental clarity matters as much as physical recovery. I'm sharper during long training days and my mood stays more stable even during our busiest seasons. I chose Nordic Naturals because it's third-party tested for purity and doesn't leave that fishy aftertaste some brands have. It's not flashy, but after nearly 30 years in group fitness (since 1995), I've learned the basics done consistently beat any trendy stack.
I'm a certified personal trainer and brain health trainer with 20+ years working with women over 40, many dealing with post-op recovery, osteoporosis, and cognitive concerns. The one supplement I personally take daily is vitamin D3 with K2--specifically 5000 IU D3 paired with 100mcg K2. About three years ago, I started tracking my clients' bone density scan results alongside their vitamin D levels. Women who maintained D levels above 50 ng/mL showed measurably better bone density improvements after 12-18 months of resistance training compared to those with levels in the 30s. I got my own levels tested and was sitting at 32 ng/mL despite living an active outdoor lifestyle--running, biking, hiking regularly around Winona Lake. Since supplementing, my recovery between training sessions improved noticeably, and I stopped getting that deep muscle fatigue that used to hit me mid-week. The K2 addition is critical because it directs calcium into bones rather than soft tissues, which matters when you're doing the bone-loading exercises I teach clients with osteopenia. I use Garden of Life's mykind Organics D3 + K2 spray because the absorption is faster than pills and I can take it between client sessions without water.
I'm a board-certified Family Nurse Practitioner who's spent years in hematology/oncology and hospice care before transitioning to wellness optimization, so I've seen what the body needs when it's actually fighting for survival. The one supplement I take daily is **NAD+ precursors** (specifically sublingual NAD+ injections we offer at our clinic, though I also cycle nicotinamide riboside capsules). After working with cancer patients and watching cellular decline up close, I became obsessed with mitochondrial function and cellular energy. NAD+ levels drop dramatically as we age--by our 40s we've lost about 50% compared to our 20s. I started supplementing two years ago and noticed my mental clarity improved within weeks, plus my recovery time from workouts cut in half. What sold me wasn't just my own experience--it's what I see with our hormone optimization patients in Glendale. When we add NAD+ to their protocol alongside bioidentical hormones, they report feeling like their brain "turned back on." One 52-year-old patient told me she could finally finish work emails without rereading them three times. The research linking low NAD+ to diabetes, heart disease, and Alzheimer's matches exactly what I witnessed in my oncology days--cellular dysfunction shows up everywhere. I inject 100mg weekly at our clinic because bioavailability matters more than people realize. Oral supplements work but you need consistent dosing, and frankly, after years of watching bodies fail when nutrition couldn't reach cells properly, I don't mess around with absorption rates anymore.
I've been training clients at VP Fitness for over a decade, and I personally take **creatine monohydrate** every single day--5 grams post-workout. The brand I use is Optimum Nutrition Micronized Creatine Powder because it dissolves cleanly and doesn't cause any bloating. Here's why it matters for me: I'm not just programming workouts--I'm demonstrating lifts, spotting clients, running group classes, and staying on the gym floor for 8-10 hours straight. About three years ago, I noticed my strength endurance was dropping during afternoon sessions. I'd hit a wall around 2pm and my form would get sloppy when showing proper squat depth or push-up mechanics. Since adding creatine, my performance stays consistent all day. I can still demo heavy deadlifts at 5pm without feeling gassed, and my recovery between back-to-back training sessions improved noticeably. When you're leading by example in a fitness business, you can't afford to look tired or weak in front of clients--they need to see that what you're teaching actually works on your own body first.
Founder & Medical Director at New York Cosmetic Skin & Laser Surgery Center
Answered 3 months ago
Creatine monohydrate is the one supplement I take most days. Long clinic days can be a grind. I still like to lift before or after surgery, and I want my training to feel steady. I keep it simple. I mix 3 to 5 grams in water. It helps with short bursts of effort, which is how most strength work feels. I found a study that pooled 69 randomized trials with 1,937 participants. When creatine was paired with resistance training, bench or chest press strength rose by about 2.16 kg versus placebo. Strength gains were not as clear when people took creatine without training. That matches what I see in real life. The powder supports the work, it does not replace it.
Great question. I'm a PA specializing in men's health--spent years at Men's Health Boston and now run my own practice in Providence. I work with men dealing with hormone imbalances, ED, and age-related metabolic issues every day, so I see what moves the needle. I take vitamin D3--specifically 5,000 IU daily. Here's why: when we run comprehensive labs on new patients at our clinic, roughly 70% come back deficient or insufficient in vitamin D. These are guys in their 40s and 50s complaining about fatigue, brain fog, and low libido--classic low testosterone symptoms--but their vitamin D is sitting at 18-22 ng/mL when optimal is 50+. I had one patient last year whose total testosterone was borderline at 320 ng/dL. Before jumping to hormone replacement, we corrected his vitamin D from 19 to 52 over three months. His testosterone climbed to 480 naturally, and his energy and mood improved enough that he decided to hold off on TRT. That's not typical for everyone, but it showed me vitamin D isn't just "bone health"--it's foundational for hormone production and metabolic function. Living in New England makes it worse--our winters are brutal, and most guys aren't getting adequate sun exposure. I use Thorne's D3 because it's third-party tested, but honestly any reputable brand at 2,000-5,000 IU works. Get your levels checked first, but this is the one supplement I'd never skip.
My personal journey from exhaustion and an autoimmune disease back to vitality taught me the power of gut health, so a high-quality probiotic is my non-negotiable daily supplement. It's a simple act that supports my digestion and skin, which in turn helps keep my energy levels consistently high. When my internal systems are thriving, I can thrive in my life and work.
I've been running gyms in Florida for 40 years, and the one supplement I take consistently is creatine monohydrate--5 grams daily, every morning. Not for muscle size (though that's a bonus), but because it genuinely helps my mental clarity during long operational days managing two facilities. About two years ago I started tracking how our members who used creatine performed in our in-gym challenges versus those who didn't. The creatine users had noticeably better strength progression week-over-week, especially in the 45+ age group. That data made me start taking it myself, and within three weeks I could feel the difference during back-to-back staff meetings and facility walkthroughs--less afternoon brain fog, better decision-making stamina. I use Optimum Nutrition micronized creatine because it mixes easily and doesn't cause any digestive issues. At 60+ years old and working full-time in a demanding industry, I need every edge I can get. Our trainers at Fitness CF now recommend it to members who plateau in strength training, and we've seen people break through stalls they'd been stuck at for months. The best part? It's dirt cheap compared to most supplements, and the research backing it is rock solid. No gimmicks, no trends--just consistent results for both performance and cognition.
After 40 years in the fitness industry and building Just Move Athletic Clubs across Florida, I've seen every supplement trend come and go. The one I personally take daily is creatine monohydrate--5 grams every morning with my coffee. Here's why: it's the most researched supplement in fitness with actual proven results for strength, recovery, and even cognitive function. I'm 40+ years into this business and still training hard myself. Creatine helps me maintain muscle mass and energy levels without any complicated timing or cycling protocols. At our clubs, I've watched trainers use it with clients ranging from 25-year-old athletes to our Silver Sneakers members in their 70s. One of our North Lakeland trainers had a 68-year-old client increase her functional strength by 15% over 12 weeks using basic programming plus creatine supplementation. That kind of real-world result is what matters to me. The brand matters less than consistency--I use Optimum Nutrition because it dissolves well and doesn't upset my stomach. It's cheap, effective, and has decades of safety data. No proprietary blends, no marketing hype, just something that actually works.
As a certified personal trainer and health coach who also runs a personal training studio, I take **creatine monohydrate** daily--5g every morning. Most people think it's just for bodybuilders, but the performance and recovery benefits matter whether you're training clients back-to-back or grinding through business development calls for a medical device startup. I started tracking my energy levels during 10-12 hour days where I'm jumping between training sessions, business meetings, and managing the studio. After adding creatine, my mental clarity during afternoon strategy calls improved noticeably--I wasn't hitting that 3pm wall anymore. The cognitive benefits are real, not just the muscle recovery piece everyone talks about. The brand I use is **Optimum Nutrition Micronized Creatine Monohydrate**. It's unflavored, mixes clear in water or coffee, and costs about $15 for a three-month supply. When you're juggling multiple businesses and need consistent energy without another stimulant, creatine delivers without the jitters or crash. I also recommend it to clients who do high-intensity training at our studio because their workout-to-workout performance stays more consistent. Recovery between sessions matters when you're paying for personalized training--nobody wants to waste a session feeling depleted from two days ago.
I'm not a nutritionist or trainer, but one supplement I consistently take is magnesium, mostly because I noticed how tense my body felt by the end of long days. One evening stands out. Sleep felt shallow and recovery lagged even when workouts were light. It felt odd at first paying attention to something that subtle. I started taking a basic magnesium glycinate at night and within a couple weeks my sleep settled and muscle tightness eased. The biggest change was consistency, not a performance spike. Mornings felt steadier. Stress didn't linger as long. What mattered most was choosing one thing and observing it carefully instead of stacking supplements. Health improved once I stopped chasing fixes and paid attention, abit more patiently.
I personally take magnesium because it helps with both recovery and sleep. My work days are long and stress adds up quietly, so I need it to stay balanced. I noticed I was sleeping better and my muscles were less stiff after taking it regularly. It's not about instant results, it's about steady improvement over time. If others are thinking about taking supplements, start with one thing and see how your body reacts. One well-chosen supplement is a whole lot better than trying a bunch of random ones.
Omega-3 fatty acids, especially from fish oil, are widely recommended for their health benefits, such as enhancing heart health, reducing inflammation, and supporting cognitive function. In the business development realm, the rising consumer interest in wellness products, particularly among athletes seeking better performance and recovery, underscores a strong market demand for omega-3 supplements, making them a strategic growth opportunity in the health sector.